Dr. Fabian I. Ezema
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Dr. Fabian I. Ezema

Professor
Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria

Highest Degree
Ph.D. in Physical Science Engineering from University of Nigeria, Nsukka, Nigeria

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Area of Interest:

Physical Science Engineering
100%
Thin Films
62%
Nanomaterials
90%
Materials Physics
75%
Chemical Physics
55%

Research Publications in Numbers

Books
5
Chapters
27
Articles
210
Abstracts
8

Selected Publications

  1. Okorieimoh, C.C., U. Chime, A.C. Nkele, A.C. Nwanya and I.G. Madiba et al., 2019. Room-temperature synthesis and optical properties of nanostructured Ba-Doped ZnO thin films. Superlattices Microstruct., 130: 321-331.
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  2. Offor, P.O., G.M. Whyte, V.A. Ezekoye, A.D. Omah and S.N. Ude et al., 2019. Structural, morphological and optical properties of spray-formed silver-doped zinc sulphide thin films. Optik, 185: 519-528.
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  3. Offor, P.O., G.M. Whyte, F.U. Otung, P.S. Nnamchi and S.N. Ude et al., 2019. The characteristics and wettability response of spray-synthesized ZnS films complexed with glycine. Surfaces Interfaces, 16: 157-163.
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  4. Offiah, S.U., A.N.C. Agbogu, A.C. Nwanya, A.C. Nkele and B.T. Sone et al., 2019. Influence of Cd ions on the structural and spectral properties of CdZnS thin films. Vacuum, 160: 246-254.
  5. Obodo, R.M., A.C. Nwanya, A.B.C. Ekwealor, I. Ahmad and T. Zhao et al., 2019. Influence of pH and annealing on the optical and electrochemical properties of cobalt (III) oxide (Co3O4) thin films. Surfaces Interfaces, 16: 114-119.
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  6. Nwanya, A.C., M.M. Ndipingwi, N. Mayedwaa, L.C. Razanamahandry and C.O. Ikpo et al., 2019. Maize (Zea mays L.) fresh husk mediated biosynthesis of copper oxides: Potentials for pseudo capacitive energy storage. Electrochim. Acta, 301: 436-448.
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  7. Nwankwo, U., R. Bucher, A.B.C. Ekwealor, S. Khamlich, M. Maaza and F.I. Ezema, 2019. Synthesis and characterizations of rutile-TiO2 nanoparticles derived from chitin for potential photocatalytic applications. Vacuum, 161: 49-54.
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  8. Nkele, A.C., K.C. Ugochi, C.N. Assumpta, D. Obi and O. Daniel et al., 2019. Role of metallic dopants on the properties of copper (1) iodide nanopod-like structures. Vac., 161: 306-313.
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  9. Nkele, A.C., A.C. Nwanya, N.U. Nwankwo, A.B.C. Ekwealor and R.U. Osuji et al., 2019. Structural, optical and electrochemical properties of SILAR-deposited zirconium-doped cadmium oxide thin films. Mater. Res. Express, Vol. 6. 10.1088/2053-1591/ab31f5.
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  10. Madubuonu, N., S.O. Aisida, A. Ali, I. Ahmad and T.K. Zhao et al., 2019. Biosynthesis of iron oxide nanoparticles via a composite of Psidium guavaja-Moringa oleifera and their antibacterial and photocatalytic study. J. Photochem. Photobiol. B: Biology, Vol. 199. 10.1016/j.jphotobiol.2019.111601.
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  11. Khan, S., I. Ahmad, M.H. Raza, T.K. Zhao and F.I. Ezema, 2019. Structural modification and bandgap tunning of cubic AlN thin film by carbon ions irradiations. Opt. Quantum Elect., Vol. 51. 10.1007/s11082-019-1934-5.
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  12. Ike, P.O., S. Ezugwu, R. Chikwenze, A.C. Nwanya and A.E. Ezugwuet al., 2019. Efficient control of band gap energy and optical properties of titania thin films for dye-sensitized solar cell applications. Optik, 191: 1-9.
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  13. Ijeh, R.O., A.C. Nwanya, A.C. Nkele, Z. Khumalo and I.G. Madiba et al., 2019. Magnetic and optical properties of electrodeposited nanospherical copper doped nickel oxide thin films. Phys. E: Low-Dimen. Syst. Nanostruct., 113: 233-239.
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  14. Ighodalo, K.O., B.N. Ezealigo, A. Agbogu, A.C. Nwanya and D. Obi et al., 2019. Effects of deposition cycles on the structural and optical properties of SILAR deposited CoS thin films for solar cell application. Mater. Sci. Semiconduct. Process., 101: 16-27.
  15. Bashir, A.K.H., N. Mayedwa, K. Kaviyarasu, L.C. Razanamahandry and N. Matinise et al., 2019. Investigation of electrochemical performance of the biosynthesized α-Fe2O3 nanorods. Surfaces Interfaces, Vol. 17. 10.1016/j.surfin.2019.100345.
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  16. Bashir, A.K.H., L.C. Razanamahandry, A.C. Nwanya, K. Kaviyarasu and W. Saban et al., 2019. Biosynthesis of NiO nanoparticles for photodegradation of free cyanide solutions under ultraviolet light. J. Phys. Chem. Solids, 134: 133-140.
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  17. Aisida, S.O., R.M. Obodo, M. Arshad, I. Mahmood and I. Ahmad et al., 2019. Irradiation-induced structural changes in ZnO nanowires. Nuclear Instruments Meth. Phys. Res. Section B: Beam Interact. Mater. Atoms, 458: 61-71.
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  18. Aisida, S.O., P.A. Akpa, I. Ahmad, M. Maaza and F.I. Ezema, 2019. Influence of PVA, PVP and PEG doping on the optical, structural, morphological and magnetic properties of zinc ferrite nanoparticles produced by thermal method. Phys. B: Condensed Matter, 571: 130-136.
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  19. Aisida, S.O., N. Madubuonu, M.H. Alnasir, I. Ahmad, S. Botha, M. Maaza and F.I. Ezema, 2019. Biogenic synthesis of iron oxide nanorods using Moringa oleifera leaf extract for antibacterial applications. Applied Nanosci., 10.1007/s13204-019-01099-x.
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  20. Aisida, S.O., K. Ugwu, P.A. Akpa, A.C. Nwanya and U. Nwankwo et al., 2019. Biosynthesis of silver nanoparticles using bitter leave (Veronica amygdalina) for antibacterial activities. Surfaces Interfaces, Vol. 17. 10.1016/j.surfin.2019.100359.
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  21. Aisida, S.O., K. Ugwu, P.A. Akpa, A.C. Nwanya and P.M. Ejikeme et al., 2019. Biogenic synthesis and antibacterial activity of controlled silver nanoparticles using an extract of Gongronema latifolium. Mater. Chem. Phys., Vol. 237. 10.1016/j.matchemphys.2019.121859.
    CrossRef  |  PubMed  |  
  22. Tyona, M.D., S.B. Jambure, C.D. Lokhande, A.G. Banpurkar, R.U. Osuji and F.I. Ezema, 2018. Dye-sensitized solar cells based on Al-doped ZnO photoelectrodes sensitized with rhodamine. Mater. Lett., 220: 281-284.
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  23. Tyona, M.D., R.U. Osuji, C.D. Lokhande and F.I. Ezema, 2018. Photovoltaic properties of aluminum doped zinc oxide electrodes based on variation of aluminum impurities in the semiconductor. J. Mater. Phys. Chem., 6: 9-16.
  24. Ohwofosirai, A., M.D. Femi, A. Sunday, O. Sunday and F.I. Ezema et al., 2018. A study of the optical conductivity, extinction coefficient and dielectric function of CdO by Sucessive Ionic Layer Adsorption and Reaction (SILAR) techniques. Am. Chem. Sci., 4: 736-744.
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  25. Nwoke, O.O., I.F. Ezema, V.N. Chigor, E.C. Anoliefo and C.C. Mbajiorgu, 2018. Disinfection of a farmstead roof harvested rainwater for potable purposes using an automated solar photocatalytic reactor. Agric. Eng. Int., 20: 52-60.
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  26. Nwankwo, M.C., A.C. Nwanya, A. Agbogu, A.B.C. Ekwealor and P.M. Ejikeme et al., 2018. Electrochemical supercapacitive properties of SILAR-Deposited Mn3O4 electrodes. Vacuum, 158: 206-214.
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  27. Khan, M.R., M.A.R. Khan, I. Ahmad, M.A. Khan, T. Iqbal, F.I. Ezema and M. Malek, 2018. Joining of individual silicon carbide nanowires via proton beam irradiation. Curr. Nanosci., 14: 354-359.
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  28. Darbar, D., M.R. Anilkumar, V. Rajagopalan, I. Bhattacharya and H.I. Elim et al., 2018. Studies on spinel cobaltites, MCo2O4 (M= Mn, Zn, Fe, Ni and Co) and their functional properties. Ceram. Int., 44: 4630-4639.
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  29. Chime, U.K., F.I. Ezema and J. Marques-Hueso, 2018. Porosity and hole diameter tuning on nanoporous anodic aluminium oxide membranes by one-step anodization. Optik, 174: 558-562.
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  30. Apeh, O.O., U. Chime, S.N. Agbo, S. Ezugwu and R. Taziwa et al., 2018. Properties of nanostructured ZnO thin films synthesized using a modified aqueous chemical growth method. Mater. Res. Express, Vol. 6. 10.1088/2053-1591/aadcd6.
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  31. Ahmad, I., M. Usman, T.K. Zhao, S. Qayum and I. Mahmood et al., 2018. Bandgap engineering of TiO2 nanoparticles through MeV Cu ions irradiation. Arab. J. Chem., 10.1016/j.arabjc.2018.11.008.
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  32. Tyona, M.D., R.U. Osuji, P.U. Asogwa, S.B. Jambure and F.I. Ezema, 2017. Structural modification and band gap tailoring of zinc oxide thin films using copper impurities. J. Solid State Electrochem., 21: 2629-2638.
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  33. Offor, P.O., A.C. Nwanya, A.D. Omah, C.C. Daniel-Mkpume, M. Maaza, B.A. Okorie and F.I. Ezema, 2017. Chemical spray pyrolysis deposition of zinc sulphide thin films using ethylenediaminetetraacetic acid disodium salt complexant. J. Solid State Electrochem., 21: 2687-2697.
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  34. Offiah, S.U., S.N. Agbo, P. Sutta, M. Maaza, P.E. Ugwuoke, R.U. Osuji and F.I. Ezema, 2017. Study of the extrinsic properties of ZnO: Al grown by SILAR technique. J. Solid State Electrochem., 21: 2621-2628.
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  35. Nwanya, A.C., D. Obi, R.U. Osuji, R. Bucher, M. Maaza and F.I. Ezema, 2017. Simple chemical route for nanorod-like cobalt oxide films for electrochemical energy storage applications. J. Solid State Electrochem., 21: 2567-2576.
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  36. Nwanya, A.C., C. Awada, D. Obi, K. Raju and K.I. Ozoemena et al., 2017. Nanoporous copper-cobalt mixed oxide nanorod bundles as high performance pseudocapacitive electrodes. J. Electroanal. Chem., 787: 24-35.
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  37. Ighodalo, K.O., D. Obi, A. Agbogu, B.N. Ezealigo and A.C. Nwanya et al., 2017. The structural and optical properties of metallic doped copper (I) iodide thin films synthesized by SILAR method. Mater. Res. Bull., 94: 528-536.
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  38. Ezealigo, B.N., A.C. Nwanya, S. Ezugwu, S. Offiah and D. Obi et al., 2017. Method to control the optical properties: Band gap energy of mixed halide Organolead perovskites. Arab. J. Chem., 10.1016/j.arabjc.2017.09.002.
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  39. Ezealigo, B.N., A.C. Nwanya, A. Simo, R.U. Osuji, R. Bucher, M. Maaza and F.I. Ezema, 2017. Optical and electrochemical capacitive properties of copper (I) iodide thin film deposited by SILAR method. Arab. J. Chem., 10.1016/j.arabjc.2017.01.008.
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  40. Chibuko, U.M., S.U. Offiah, P.U. Asogwa, P.E. Ugwuoke and F.I. Ezema, 2017. Influence of deposition parameters on spectral and structural properties of CdS thin films for solar cells applications. Niger. J. Solar Energy, 28: 1-7.
  41. Tyona, M.D., R.U. Osuji, F.I. Ezema, S.B. Jambure and C.D. Lokhande, 2016. Enhanced photoelectrochemicalsolar cells based on natural dye-sensitized Al-doped zinc oxide electrodes. Adv. Applied Sci Res., 7: 18-31.
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  42. Tyona, M.D., R.U. Osuji, F.I. Ezema and C.D. Lokhande, 2016. Modification of structural and optical properties induced by annealing of ZnO thin films synthesized by sol gel spin coating technique. Niger. J. Pure Applied Sci., 8: 242-253.
  43. Nwanya, A.C., D. Obi, K.I. Ozoemena, R.U. Osuji and C. Awada et al., 2016. Facile synthesis of nanosheet-like CuO film and its potential application as a high-performance pseudocapacitor electrode. Electrochim. Acta, 198: 220-230.
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  44. Nithyadharseni, P., M.V. Reddy, K.I. Ozoemena, F.I. Ezema, R.G. Balakrishna and B.V.R. Chowdari, 2016. Electrochemical performance of BaSnO3 anode material for lithium-ion battery prepared by molten salt method. J. Electrochem. Soc., 163: A540-A545.
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  45. Mogal, G.J., P.D. Hire, G.E. Patil, V.B. Gaikwad, F.I. Ezema and G.H. Jain, 2016. TiO2 nanorods based highly sensitive liquefied petroleum gas sensor. J. Adv. Phys., 5: 1-7.
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  46. Henni, A., A. Merrouche, L. Telli, A. Karar, F.I. Ezema and H. Haffar, 2016. Optical, structural and photoelectrochemical properties of nanostructured ln-doped ZnO via electrodepositing method. J. Solid State Electrochem., 20: 2135-2142.
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  47. Ezema, C.G., A.C. Nwanya, B.E. Ezema, B.H. Patil and R.N. Bulakhe et al., 2016. Photo-electrochemical studies of chemically deposited nanocrystalline meso-porous n-type TiO2 thin films for Dye-Sensitized Solar Cell (DSSC) using simple synthesized azo dye. Applied Phys. A, Vol. 122. 10.1007/s00339-016-9965-2.
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  48. Daniel-Umeri, R., R.U. Osuji and F.I. Ezema, 2016. Synthesis and characterisation of copper oxide thin films using Successive Ionic Layer Adsorption Reaction (SILAR) method. Chem. Mater. Res., 8: 68-76.
  49. Amaechi, I.C., A.C. Nwanya, D. Obi, S.C. Ezugwu and A.E. Udounwa et al., 2016. Structural characterization and electrochemical properties of cerium-vanadium (Ce-V) mixed oxide films synthesized by chemical route. Ceram. Int., 42: 3518-3524.
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  50. Tyona, M.D., R.U. Osuji, F.I. Ezema, S.B. Jambure and C.D. Lokhande, 2015. Highly efficient natural dye-sensitized photoelectrochemical solar cells based on Cu-doped zinc oxide thin film electrodes. Adv. Applied. Sci Res., 6: 7-20.
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  51. Offor, P.O., B.A. Okorie, F.I. Ezema, V.S. Aigbodion, C.C. Daniel-Mkpume and A.D. Omah, 2015. Synthesis and characterization of nanocrystalline zinc sulphide thin films by chemical spray pyrolysis. J. Alloys Compounds, 650: 381-385.
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  52. Nwanya, A.C., S.U. Offiah, I.C. Amaechi, S. Agbo and S.C. Ezugwu et al., 2015. Electrochromic and electrochemical supercapacitive properties of room temperature PVP capped Ni (OH)2/NiO thin films. Electrochim. Acta, 171: 128-141.
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  53. Nwanya, A.C., P.R. Deshmukh, R.U. Osuji, M. Maaza, C.D. Lokhande and F.I. Ezema, 2015. Synthesis, characterization and gas-sensing properties of SILAR deposited ZnO-CdO nano-composite thin film. Sensors Actuat. B: Chemical, 206: 671-678.
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  54. Nwanya, A.C., C.I. Amaechi, A.E. Udounwa, R.U. Osuji, M. Maaza and F.I. Ezema, 2015. Complex impedance and conductivity of agar-based ion-conducting polymer electrolytes. Applied Phys. A, 119: 387-396.
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  55. Nwanya, A.C., C.I. Amaechi, A.B.C. Ekwealor, R.U. Osuji, M. Maaza and F.I. Ezema, 2015. Dye-sensitized solar cell with natural gel polymer electrolytes and f-MWCNT as counter-electrode. Philosop. Mag., 95: 1490-1498.
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  56. Mogal, G.J., D.V. Ahire, G.E. Patil, F.I. Ezema and G.H. Jain, 2015. Hydrothermally synthesized nano TiO2 thick films for gas sensing application. Chem. Sci., 4: 296-302.
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  57. Iwueke, D.C., C.I. Amaechi, A.C. Nwanya, A.B.C. Ekwealor and P.U. Asogwa et al., 2015. A novel chemical preparation of Ni(OH)2/CuO nanocomposite thin films for supercapacitive applications. J. Mater. Sci.: Mater. Elect., 26: 2236-2242.
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  58. Ezema, C.G., S.U. Offiah, A.C. Nwanya, P.O. Ukoha, B.E. Ezema, M. Maaza and F.I. Ezema, 2015. Electrochemical studies of Pvp-Capped Pbs thin film deposited by polymer-assisted chemical bath deposition (Pacbd). Chalcogenide Lett., 12: 11-23.
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  59. Amaechi, I.C., A.C. Nwanya, P.U. Asogwa, R.U. Osuji, M. Maaza and F.I. Ezema, 2015. Hall coefficient determination and electrical properties of chemical bath-deposited n-WO3 thin films. J. Elect. Mater., 44: 1110-1115.
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  60. Amaechi, I.C., A.C. Nwanya, A.B. Ekwealor, P.U. Asogwa, R.U. Osuji, M. Maaza and F.I. Ezema, 2015. Electronic thermal conductivity, thermoelectric properties and supercapacitive behaviour of conjugated polymer nanocomposite (polyaniline-WO3) thin film. Eur. Phys. J. Applied Phys., Vol. 69. 10.1051/epjap/2015140441.
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  61. Uduh, U.C., R.M. Obodo, S. Esaenwi, C.I. Amaechi, P.U. Asogwa, R.U. Osuji amd F.I. Ezema, 2014. Sol-gel synthesis, optical and structural characterization of ZrOS nanopowder. J. Sol-Gel Sci. Technol., 71: 79-85.
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  62. Reddy, M.V., T.W. Jie, C.J. Jafta, K.I. Ozoemena and M.K. Mathe et al., 2014. Studies on bare and Mg-doped LiCoO2 as a cathode material for Lithium ion batteries. Elect. Acta, 128: 192-197.
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  63. Offiah, S.U., M.O. Nwodo, A.C. Nwanya, S.C. Ezugwu and S.N. Agbo et al., 2014. Effects of post-thermal treatments on morphological and optical properties of NiO/Ni (OH)2 thin films synthesized by solution growth. Optik-Int. J. Light Elect. Opt., 125: 2905-2908.
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  64. Offiah, S.U., A.C. Nwanya, S.C. Ezugwu, B.T. Sone and R.U. Osuji et al., 2014. Chemical bath synthesis and physico-chemical characterizations of NiO-CoO composite thin films for supercapacitor applications. Int. J. Electrochem. Sci., 9: 5837-5848.
  65. Nwanya, C.A., C.J. Jafta, P.M. Ejikeme, P.E. Ugwuoke and M.V. Reddy et al., 2014. Electrochromic and electrochemical capacitive properties of tungsten oxide and its polyaniline nanocomposite films obtained by chemical bath deposition method. Electrochim. Acta., 128: 218-225.
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  66. Mogal, G.J., G.E. Patil, F.I. Ezema, V.B. Gaikwad and G.H. Jain, 2014. Hydrothermal synthesis of TiO2 using TiCl3 with Nutrients and gas sensing performance of TiO2 thick films. Int. J. Enhanced Res. Sci. Technol. Engi., 3: 86-92.
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  67. Femi, M.D., A. Ohwofosirai, A. Sunday, O. Sunday, B.A. Ezekoye, F.I. Ezema and R.U. Osuji, 2014. Variation of the optical conductivity dielectric function and the energy bandgap of CdO using cadmium acetate dehydrate. Int. J. Adv. Electr. Electron. Eng., 2: 331-337.
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  68. Ezema, F.I., Y. Kayama, I.C. Amaechi, T. Hiramatsu and A.C. Nwanya et al., 2014. Effect of annealing on the properties of chemical bath deposited cds buffer layer of cis solar cells. Chalcogenide Lett., 11: 629-638.
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  69. Ezema F.I. and P.M. Ejikeme, 2014. Climate Change and the Physical Sciences In: Multidisciplinary Issues and Perspectives O. Nicholas, Grand Heritage Global Communications, Nigeria, ISBN: 978-978-53249-2-1 pp: 291-314.
  70. Ezekoye, B.A., F.I. Ezema, V.A. Ezekoye, P.O. Offor and U. Uduh, 2014. Synthesis, structural and surface morphological characterizations of sulfated zirconia nanoparticles via chemical route. Niger. J. Technol., 33: 54-59.
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  71. Ekwealor, A.B.C., S.U. Offiah, S.C. Ezugwu and F.I. Ezema, 2014. Variations of optical and structural properties of CoxOy thin films with thermal treatment. Indian J. Mater. Sci., Vol. 2014. 10.1155/2014/367950.
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  72. Amaechi, C.I., P.U. Asogwa, A.B.C. Ekwealor, R.U. Osuji, M. Maaza and F.I. Ezema, 2014. Fabrication and capacitive characteristics of conjugated polymer composite p-polyaniline/n-WO3 heterojunction. Applied Phys. A, 117: 1589-1598.
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  73. Agbogu, A.N.C., A.B.C. Ekwealor and F.I. Ezema, 2014. Influence of precursor concentration on structural and optical properties of CoxOy thin films. Digest J. Nanomater. Biostruct., 9: 1289-1296.
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  74. Tyona, M.D., R.U. Osuji and F.I. Ezema, 2013. A review of zinc oxide photoanode films for dye-sensitized solar cells based on zinc oxide nanostructures. Adv. Nano Res., 1: 43-58.
  75. Onah, D.U., C.E. Okeke, R.U. Osuji, B.A. Ezekoye and J.E. Ekpe et al., 2013. Study of the effects of thermal annealing on the optical band gap of nanocrystalline CoO thin films prepared by chemical bath deposition. Chem. Mater. Res., 3: 43-51.
  76. Ohwofosirai, A., C. Chigbo, S.L. Mammah, P.E. Ugwuoke, R.U. Osuji and F.I. Ezema, 2013. Flower-like ZnO thin film deposited by chemical bath deposition. J. Nanosci. Nanoeng. Applic., 3: 16-21.
  77. Nwanya, A.C., P.E. Ugwuoke, B.A. Ezekoye, R.U. Osuji and F.I. Ezema, 2013. Structural and optical properties of chemical bath deposited silver oxide thin films: Role of deposition time. Adv. Mater. Sci. Eng., Vol. 2013. 10.1155/2013/450820.
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  78. Mammah, S.L., F.E. Opara, V.B. Omubo-Pepple, J.E.E. Ntibi, S.C. Ezugwu and F.I. Ezema, 2013. Annealing effect on the optical and solid state properties of cupric oxide thin films deposited using the Aqueous Chemical Growth (ACG) method. Natural Sci., 5: 389-399.
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  79. Ezekoye, B.A., P.O. Offor, V.A. Ezekoye and F.I. Ezema, 2013. Chemical bath deposition technique of thin films: A review. Int. J. Scient. Res., 2: 452-456.
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  80. Ekwealor, A.B.C. and F.I. Ezema, 2013. Optical and structural properties variations with precursor concentration for crxoy thin films synthesized in a polymer matrix by chemical bath deposition technique. Digest. J. Nanomater. Biostruct., 8: 377-384.
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  81. Ekwealor, A.B.C. and F.I. Ezema, 2013. Effects of precursor concentration on the optical and structural properties of Fe2O3 thin films synthesized in a polymer matrix by chemical bath deposition. J. Ovonic Res., 9: 35-43.
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  82. Agbo, S.N., P.E. Ugwuoke and F.I. Ezema, 2013. Deposition pressure and hydrogen dilution effects on the spectral response of thin film nanocrystalline silicon solar cells. J. Ovonic Res., 9: 1-8.
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  83. Uche, O.V., F.I. Ezema and O.U. Rose, 2012. Synthesis and characterization of local impurities doped stannous iodide (SnI2) crystal in silica gel. Adv. Applied Sci. Res., 3: 1175-1184.
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  84. Uche, O.V., F.I. Ezema and O.U. Rose, 2012. A study of the optical properties of un-doped and potash doped lead chloride crystal in silica gel. Adv. Applied Sci. Res., 3: 103-109.
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  85. Onah, D.U., C.E. Okeke and F.I. Ezema, 2012. Study of annealing effects of TiO2/CoO core-shell thin films grown by chemical bath deposition technique. Asian Trans. Sci. Technol., 2: 32-39.
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  86. Onah, D.U., A.B.C. Ekwealor, B.A. Ezekoye, R.U. Osuji, F.I. Ezema and C.E. Okeke, 2012. Synthesis, structural and optical properties of novel core-shell oxide materials by chemical bath deposition. J. Ovonic Res., 8: 105-111.
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  87. Offiah, S.U., P.E. Ugwuoke, F.I. Ezema, A.B.C. Ekwealor and R.U. Osuji, 2012. Comparative study of CuxS and CuySe thin films grown by CBD. Chalcogenide Lett., 9: 257-264.
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  88. Offiah, S.U., P.E. Ugwuoke, A.B.C. Ekwealor, S.C. Ezugwu, R.U. Osuji and F.I. Ezema, 2012. Structural and spectral analysis of chemical bath deposited copper sulfide thin films for solar energy conversions. Digest J. Nanomater. Biostruct., 7: 165-173.
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  89. Nwanya, A.C., P.E. Ugwuoke, P.M. Ejikeme, O.U Oparaku and F.I. Ezema, 2012. Jathropha curcas and Citrus aurantium leaves dye extract for use in dye sensitized solar cell with TiO2 films. Int. J. Electrochem. Sci., 7: 11219-11235.
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  90. Nwanya, A.C., P.E. Ugwuoke, O.U. Oparaku and F.I. Ezema, 2012. Chemical bath deposited TiO2 films prepared for use in dye sensitized solar cell. Nig. J. Sol. Ener., 23: 165-170.
  91. Mammah, S.L., F.E. Opara, J. Ntibi, S.C. Ezugwu and F.I. Ezema, 2012. Annealing effect on the solid state and optical properties of α-Fe2O3 thin films deposited using the Aqueous Chemical Growth (ACG) method. Mater. Sci. Appl., 3: 793-801.
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  92. Mammah, S.L., F.E. Opara, F.B. Sigalo, S.C. Ezugwu and F.I. Ezema, 2012. Effect of concentration on the optical and solid state properties of ZnO thin films deposited by Aqueous Chemical Growth (ACG) method. J. Mod. Phys., 3: 947-954.
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  93. Ishiwu, S.M.U., M.N. Nnabuchi, F.I. Ezema, S.C. Ezugwu and C.N. Eze, 2012. The effect of chemical constituents on the optical and solid state properties of lead selenide (PbSe) thin films grown chemical bath (CBD) technique. Niger. J. Sol. Ener., 23: 140-145.
  94. Agbo, S.N., P.E. Ugwuoke and F.I. Ezema, 2012. Opto-electronic modelling of thin film nanocrystalline silicon solar cells. J. Ovonic Res., 8: 81-90.
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  95. Offiah, S.U., S. C. Ezugwu, F.I. Ezema and O.U. Oparaku, 2011. Spectral analysis of chemical bath deposited copper selenide thin films. Niger. J. Solar Energy, 22: 97-104.
  96. Nwodo, M.O., S.C. Ezugwu, F.I. Ezema, R.U. Osuji and P.U. Asogwa, 2011. Effect of thermal annealing on the optical and structural, properties of PbO thin film. J. Optoelectron. Biomed. Mater., 3: 95-100.
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  97. Nwanya, A.C., F.I. Ezema and P.M. Ejikeme, 2011. Dyed sensitized solar cells: A technically and economically alternative concept to p-n junction photovoltaic devices. Int. J. Phys. Sci., 6: 5190-5201.
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  98. Ezugwu, S.C., F.I. Ezema, P.U. Asogwa, A.E. Ajuba, M.P. Ogbu and D.D.O. Eya, 2011. The effect of deposition time on the structural and optical properties of Zno thin films by aqueous chemical growth technique. Digest J. Nanomater. Biostruc., 6: 1301-1310.
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  99. Ezema, F.I. and U.O.A. Nwankwo, 2011. Effect of concentration of Mn dopant ions on the structural and optical properties of zinc oxide crystals. Digest J. Nanomater. Biostruc., 6: 271-278.
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  100. Ekuma, C.E., E.V. Esabunor, E. Osarolube, I.O. Owate, F.I. Ezema, E.O. Chukwuocha and M.C. Onyeaju, 2011. Optoelectronic properties and band gap narrowing in chemically PbO doped TiO2 thin film. Optoelectron. Adv. Mater.-Rapid Commun., 5: 960-963.
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  101. Amaechi, C.I., S.C. Ezugwu, F.I. Ezema, P.U. Asogwa and A.E. Ajuba, 2011. Composition, optical and solid state properties of quarternary Cd0.39Ba0.28S0.10O0.23 thin films. J. Non-Oxide Glasses, 3: 1-7.
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  102. Adeloju, K.A. and F.I. Ezema, 2011. Effect of natural dye extracting temperature on the performances of dye sensitized solar cells using Petrocarpus erinaceus. Archiv. Phys. Res., 2: 191-196.
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  103. Smu, I. and M.N. Nnabuchi, 2010. The optical and solid state properties of lead selenide (PbSe) thin films grown by Chemical Bath Deposition (CBD) technique. J. Ovonic Res., 6: 81-86.
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  104. Offiah, S.U., S.C. Ezugwu, F.I. Ezema, O.U. Oparaku and P.U. Asogwa, 2010. Effects of deposition media and thermal annealing on chemical bath deposited zinc oxide thin films. J. Ovonic Res., 6: 135-141.
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  105. Nwodo, M.O., S.C. Ezugwu, F.I. Ezema, P.U. Asogwa and R.U. Osuji, 2010. Chemical bath deposition and characterization of PVP capped tin oxide thin films. J. Optoelectron. Biomed. Mater., 2: 267-272.
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  106. Ezugwu, S.C., P.U. Asogwa, F.I. Ezema and R.U. Osuji, 2010. Synthesis and characterization of Co doped CdS thin films grown within a polymer matrix by solution growth technique. J. Non-Oxide Glasses, 2: 121-127.
  107. Ezugwu, S.C., P.U. Asogwa, F.I. Ezema and P.M. Ejikeme, 2010. Structural and optical characterization of PVP-capped lead oxide nanocrystalline thin films. J. Optoelectron. Adv. Mater., 12: 1765-1771.
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  108. Ezugwu, S.C., F.I. Ezema, R.U. Osuji, P.U. Asogwa, A.B.C. Ekwealor and B.A. Ezekoye, 2010. Structural and optical properties of PVA capped nickel oxide thin film prepared by chemical bath deposition. J. Phys. Sci., 1: 43-47.
  109. Ezugwu, S.C., F.I. Ezema and P.U. Asogwa, 2010. Synthesis and characterization of ternary CuSbS2 thin films: Effect of deposition time. Chalcogenide Lett., 7: 341-348.
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  110. Ezema, F.I., S.C. Ezugwu, R.U. Osuji, P.U. Asogwa, B.A. Ezekoye, A.B.C. Ekwealor and M.P. Ogbu, 2010. Role of thermal annealing on the optical and solid state properties of chemically deposited cadmium sulphide nanocrystalline thin film grown in a polymer matrix. J. Non-Oxide Glasses, 1: 45-50.
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  111. Ezema, F.I., S.C. Ezugwu, P.U. Asogwa, A.B.C. Ekwealor and R.U. Osuji, 2010. Synthesis and characterization of CdS nanowires and CdS/TlS nanoflower grown in a polymer matrix by chemical bath deposition (CBD) method. Optoelectron. Adv. Mater. Rapid Communi., 4: 747-750.
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  112. Ezema, F.I., D.D. Hile, S.C. Ezugwu, R.U. Osuji and P.U. Asogwa, 2010. Optical properties of CdS/CuS and CuS/CdS heterojunction thin films deposited by chemical bath deposition technique. J. Ovonic Res., 6: 99-104.
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  113. Ezema, F.I. and U.O.A. Nwankwo, 2010. Effect of annealing temperature on the structural and optical properties of zinc oxide (ZnO) nanocrystals prepared by sol gel. Digest J. Nanomater. Biostruc., 5: 981-988.
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  114. Ezema, F.I. and U.O.A. Nwankwo, 2010. Effect of annealing temperature on the structural and optical properties of Al-doped zinc oxide (ZnO) crystals. J. Optoelectron. Biomed. Mater., 1: 167-173.
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  115. Ezekoye, B.A., F.I. Ezema, A. Arome and E.N. Eze, 2010. Synthesis and characterizations of CuSe (CS) nano-thin films for photovoltaic applications. J. Nanotech. Prog. Int., 3: 39-49.
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  116. Asogwa, P.U., S.C. Ezugwu and F.I. Ezema, 2010. Variation of optical and solid state properties with post deposition annealing in PVA-capped MnO2 thin films. Superficiesy Vacio, 23: 18-22.
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  117. Ajuba, A.E., S.C. Ezugwu, P.U. Asogwa and F.I. Ezema, 2010. Composition and optical characterization of ZnO/NiO multilayer thin film: Effect of annealing temperature. Chalcogenide Lett., 7: 573-579.
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  118. Ajuba, A.E., S.C. Ezugwu, B.A. Ezekoye, F.I. Ezema and P.U. Asogwa, 2010. Influence of pH on the structural, optical and solid state properties of chemical bath deposited ZnO thin films. J. Optoelectron. Biomed. Mater., 2: 73-78.
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  119. Osuwa, J.C., C.I. Oriaku and F.I. Ezema, 2009. Impurity effects of cadmium salt on the absorption edge and structure of chemically prepared PbS films. Chalcogenide Lett., 6: 385-391.
  120. Oriaku, C.I., F.I. Ezema and J.C. Osuwa, 2009. Fabrication and optical constants of CdMnS ternary thin films deposited by chemical bath. Pacific J. Sci. Technol., 10: 413-416.
  121. Ezugwu, S.C., P.U. Asogwa, R.U. Osuji, F.I. Ezema, B.A. Ezekoye and A.B.C. Ekwealor, 2009. CdS thin solid films for photovoltaic application. Proceedings of the 2nd International Seminar on Theoretical Physics and National Development, July 5-8, 2009, Abuja, Nigeria, pp: 89-99.
  122. Ezugwu, S.C., F.I. Ezema, R.U. Osuji, P.U. Asogwa, A.B.C. Ekwealor and B.A. Ezekoye, 2009. Effect of deposition time on the band-gap and optical properties of chemical bath deposited CdNiS thin films. Optoelectron. Adv. Mater. Rapid Comm., 3: 141-144.
  123. Ezugwu, S.C., F.I. Ezema, R.U. Osuji, P.U. Asogwa and B.A. Ezekoye et al., 2009. Optical studies of chemically deposited PVA-capped PbS nanoparticle thin film. Optoelectron. Adv. Mater. Rapid Communi., 3: 528-532.
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  124. Ezema, F.I., S.C. Ezugwu, S.N. Agbo, A.B.C. Ekwealor, P.U. Asogwa and R.U. Osuji, 2009. Synthesis and characterization of thallium sulphide/cadmium sulphide and lead sulphide/cadmium sulphide thin films grown in a polymer matrix by Chemical Bath Deposition (CBD) method. Proceedings of the 24th European Photovoltaic Solar Energy Conference, September 21-25, 2009, Hamburg, Germany, pp: 295-298.
  125. Ezema, F.I., S.C. Ezugwu, P.U. Asogwa and A.B.C. Ekwealor, 2009. Solid state properties and structural characterization of Sb2S3 and Tl2S thin films. J. Ovonic Res., 5: 145-156.
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  126. Ezema, F.I., R.U. Osuji, S.C. Ezugwu, A.B.C. Ekwealor, P.U. Asogwa, B.A. Ezekoye and M. Mahaboob Beevi, 2009. Chemical bath deposition of heterojunction thin films for solar cell application. Proceeedings of the International Conference on Photonics, Nanotechnology and Computer Applications, February 25-28, 2009, Tamilnadu, India, pp: 144-150.
  127. Asogwa, P.U., S.C. Ezugwu, F.I. Ezema, A.B.C. Ekwealor, B.A. Ezekoye and R.U. Osuji, 2009. Effect of thermal annealing on the band gap and optical properties of chemical bath deposited PbS-CuS thin films. J. Optoelectron. Adv. Mater., 11: 940-944.
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  128. Asogwa, P.U., S.C. Ezugwu, F.I. Ezema and R.U. Osuji, 2009. Influence of dip time on the optical and solid state properties of as-grown Sb2S3 thin films. Chalcogenide Lett., 6: 287-292.
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  129. Agbo, S.N. and F.I. Ezema, 2009. Predicting global solar radiation using sunshine duration and ambient temperature. Proceedings of the ISES World Congress on Renewable Energy Shaping our Future, October 11-14, 2009, Johannesburg, South Africa, pp: 182-187.
  130. Ezema, F.I., A.B.C. Ekwealor and R.U. Osuji, 2008. Optical properties of chemical bath deposited nickel oxide (NiOx) thin films. Superficies Vacio, 21: 6-10.
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  131. Ugwuoke, P.E., F.I. Ezema, O.U. Oparaku and C.E. Okeke, 2007. Effect of temperature variation on the performance of polycrystalline silicon photovoltaic modules in a tropical climate. Inter. J. Phys. Sci., 2: 54-60.
  132. Ezugwu, G., F.I. Ezema and R.U. Osuji, 2007. Effect of dip times on optical properties of chemically deposited Bi2S3 thin films. Nig. J. Solar Solar Energy, 18: 37-42.
  133. Ezema, F.I., P.U. Asogwa, A.B.C. Ekwealor, P.E. Ugwuoke and R.U. Osuji, 2007. Growth and optical properties of Ag2S thin films deposited by chemical bath deposition technique. J. Univ. Chem. Technol. Metall., 42: 217-222.
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  134. Ezema, F.I., A.B.C. Ekwealor, P.U. Asogwa, P.E. Ugwuoke, C. Chigbo and R.U. Osuji, 2007. Optical properties and structural characterizations of SB2S3 thin films deposited by chemical bath deposition technique. Turk. J. Phys., 31: 205-210.
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  135. Ezema, F.I., A.B.C. Ekwealor and R.U. Osuji, 2007. Optical properties of chemical bath deposited nickel oxide (NiO) thin films. J. Optoelect., Adv. Mater., 9: 1898-1903.
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  136. Ezema, F.I. and R.U. Osuji, 2007. Preparation and optical properties of chemical bath deposited MnCdS2 thin films. FIZIKA A (Zagreb), 16: 107-116.
  137. Ezema, F.I. and R.U. Osuji, 2007. Band gap shift and optical characterization of chemical bath deposited CdSSe thin films on annealing. Chalcogenide lett., 4: 69-75.
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  138. Ezema, F.I. and M.N. Nnabuchi, 2007. Optical properties of chemical bath deposited bismuth fluoride (BiF3) thin films. Discovery Innov., 19: 33-36.
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  139. Agbo, S.N., P.E. Ugwuoke, F.I. Ezema and O.U. Oparaku, 2007. Solar radiation estimates from relative humidity-base D models. Nig. J. Solar Solar Energy, 18: 134-138.
  140. Agbo, S.N. and F.I. Ezema, 2007. Evaluation of the regression parameters of the angstrom page for predicting global solar radiation. Proceedings of the 1st International Workshop on Renewable Energy for Sustainable Development in Africa, July 29-August 1, 2007, Nsukka, Nigeria, pp: 92-97.
  141. Agbo, S.N. and F.I. Ezema, 2007. Analysis of chemically deposited MnS thin films. Pacific J. Sci. Technol. .
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  142. Ugwoke, P.E., F.I. Ezema and C.E. Okeke, 2006. Performance response of Monocrystalline Silcon PV modules to some meteorological parameters at Nsukka. Nig. J. Space Sci. Res., 2: 63-70.
  143. Ezema, F.I., N. Nnabuchi and R.U. Osuji, 2006. Optical properties of CuS thin films deposited by chemical bath deposition technique and their applications. Trends Applied Sci. Res., 1: 467-476.
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  144. Ezema, F.I., A.B.C. Ekwealor and R.U. Osuji, 2006. Effect of thermal annealing on the band gap and optical properties of chemical bath deposited ZnSe thin films. Turk. J. Phys., 30: 157-163.
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  145. Ezema, F.I. and R.U. Osuji, 2006. Preparation and optical characterization of chemical bath deposited CdCoS2 thin films. J. Applied Sci., 6: 1827-1832.
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  146. Ezema, F.I. and M.N. Nnabuchi, 2006. Growth and optical properties of chemical bath deposited MgCdS2 thin films. J. Res., 17: 115-126.
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  147. Ezema, F.I., 2005. Optical characterization of chemical bath deposited bismuth oxy iodide (BiOI) thin films. Turk. J. Phys., 29: 105-114.
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  148. Ezema, F.I., 2005. Chemical bath deposition of bismuth chloride oxide (BiClO) thin film and its applications. Pac. J. Sci. Technol., 6: 6-15.
  149. Ezema, F.I. and M.N. Nnabuchi, 2005. Optical characterization of chemical bath deposited bismuth sulphide (Bi2S4) thin films. Discovery Innov., 17: 156-166.
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  150. Ezema, F.I. and M.N. Nnabuchi, 2005. Growth characteristics and effect of thickness on optical properties of iron copper sulphide (FeCu2S3) thin films. J. Applied Sci. Technol., 10: 53-59.
  151. Ezema, F.I. and A.B.C. Ekwealor, 2005. Optical characterization and applications of chemical bath deposited beryllium iodide. Nig. J. Solar Energy 15: 73-79.
  152. Ezema, F.I., 2004. Preparation and optical properties of cadmium chloride thin films prepared by solution growth technique. Acad. Open Inter. J., Vol. 11 .
  153. Ezema, F.I., 2004. Optical properties of strontium sulphide (SrS) thin films prepared by solution growth technique. J. Univ. Chem. Technol. Metall., 39: 351-354.
  154. Ezema, F.I., 2004. Optical properties of chemical bath deposited FeCdS3 thin films. Acad. Open Inter. J., Vol. 11 .
  155. Ezema, F.I., 2004. Fabrication, optical properties and applications of undoped chemical bath deposited ZnO thin films. J. Res., Sci., 15: 343-350.
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  156. Ezema, F.I., 2004. Effects of some parametric variations on the optical properties of chemical bath deposited BiClO thin films. J. Univ. Chem. Technol. Metall., 39: 225-238.
  157. Ezema, F.I. and P.U. Asogwa, 2004. Preparation and optical properties of chemical bath deposited beryllium chloride (BeCl2) thin films. Pac. J. Sci. Technol., 5: 26-32.
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  158. Ezema, F.I. and P.E. Ugwuoke, 2004. Optical properties of Ag2S thin films by deposited chemical bath deposition technique. Proceedings of the 3rd Nigerian Materials Congress, December 5-7, 2004, Zaria, Nigeria, pp: 73-78.
  159. Ezema, F.I. and P.E. Ugwuoke, 2004. Investigation of optical properties of barium oxide (BaO) thin films deposited by chemical bath technique. Pac. J. Sci. Technol., 5: 33-38.
  160. Ezema, F.I., P.E. Ugwuoke and C.E. Okeke, 2003. Fabrication and characterization of undoped tin oxide (SnO2) thin film prepared by electroless method. Nig J. Phys., 15: 31-36.
  161. Ezema, F.I., 2003. Photovoltaic potentials of some chemical bath deposited pds and Bi2S3 thin films. Greenwich J. Sci. Technol., 4: 31-36.
  162. Ezema, F.I., 2003. Optical properties of chemical bath deposited beryllium bromide (BeBr2) thin films. J. Univ. Sci. Technol., 23: 32-40.
  163. Ezema, F.I., 2003. Investigation of optical properties of chemical bath deposited Beryllium Oxide (BeO) thin and it’s applications. Greenwich J. Sci. Technol., 3: 110-122.
  164. Ezema, F.I., 2003. Estimation of optical and electrical properties of zirconium sulphide thin films prepared by the chemical bath deposition technique and using a spectrophotometer. Greenwich J. Sci. Technol., 4: 38-44.
  165. Ezema, F.I. and C.E. Okeke, 2003. Fabrication and characterization of palladium sulphide (PdS) thin films for solar energy applications using solution growth technique. Nig. J. Solar Energy, 14: 68-72.
  166. Ezema, F.I. and C.E. Okeke, 2003. Chemical bath deposition of bismuth oxide (Bi2O3) thin films and its application. Greenwich J. Sci. Technol., 3: 90-109.
  167. Ezema, F.I. and C.E. Okeke, 2003. Chemical bath deposition of beryllium sulphide (BeS) thin films and its applications. Acad. Open Inter. J., 9: 1-18.
  168. Ezema, F.I., 2002. Characterization of zirconium sulphide thin films prepared by the chemical bath deposition technique for spectral selective coatings. J. Liberal Stud., 10: 53-66.
  169. Ezema, F.I. and C.E. Okeke, 2002. Preparation and characterization of bismuth bromide oxide thin films prepared by solution growth technique. Nig. J. Phys., 14: 48-54.
  170. Ezema, F.I. and C.E. Okeke, 2002. Characterization of bismuth fluoride (BiF3) thin films prepared by solution growth technique and its applications. Nig J. Phys., 14: 77-85.
  171. Ezema, F.I., 2001. Solar adapted Mobile Metal Base (M.M.B) solar still for production of fresh water for rural dwellers. J. Liberal Stud., 9: 289-297.
  172. Ezema, F.I., 2001. Conventional Sources of Energy. In: Introduction to Natural Sciences, Ezekwesili N.O. (Ed.)., 2nd Edn., Newcrest Publishers, Onitsha, pp: 212-225.
  173. Ezema, F.I. and P.U. Asogwa, 2001. Man and Energy. J. Liberal Stud., 9: 250-266.
  174. Ezema, F.I. and M.O. Asogwa, 2001. Space Science and Exploration. In: Introduction to Natural Sciences, Ezekwesili N.O. (Ed.)., 2nd Edn., Newcrest Publishers, Onitsha, pp: 263-295.
  175. Ezema, F.I., M.O. Asogwa and P.U. Asogwa, 1999. Solar and Stellar Systems. In: Introduction to Natural Sciences, Ezekwesili N.O. (Ed.)., 1st Edn., Newcrest Publishers, Onitsha, pp: 108-135.
  176. Asogwa, P.U. and F.I. Ezema, 1999. The Concept of Forces and Energy. In: Introduction to Natural Sciences, Ezekwesili N.O. (Ed.)., 1st Edn., Newcrest Publishers, Onitsha, pp: 94-107.
  177. Asogwa, P.U. and F.I. Ezema, 1999. Energy Transformation in Physical Systems. In: Introduction to Natural Sciences, Ezekwesili, N.O. (Ed.)., 1st Edn., Newcrest Publishers, Onitsha, pp: 167-180.