D.M. Fernandes, R. Silva, A.A.Winkler Hechenleitner, E. Radovanovic, M.A. Custodian Melon, and E.A. Gomez Pineda, Synthesis and characterization of ZnO, CuO and a mixed Zn and Cu oxide, J. Materials Chemistry and Physics , 115 (2009) 110–115.
 J. D. Wright, and A. N.J.M. Sommerdijk, Sol-Gel materials: chemistry and applications, CRC Press, Boca Raton, 1st edition , USA , 2001.
 G. Bodurov, T. V and K. Gesheva, Technology and application of transition metal oxide of W-V-O as functional layers and NiO thin films as counter electrode material in electro chromic smart windows, Phys. Procedia , 46 (2013) 149–58.
 D. Guo, G.Liu, X .Li, X .Tang, J.Zhang, X .Zhu, and S. Jiang, Transition metal oxide hierarchical nanotubes for energy applications Nanotechnology, J. Bionanosci, 9 (2015) 325-329.
 I. Hasa, D .Buchholz, S. Passerini and J. Hassoun, A comparative study of layered transition metal oxide cathodes for application in sodium-ion battery, ACS Appl. Mater. Interfaces, 7 (2015) 5206–5212.
 Z. He, L. Dai, S .Liu, L .Wang and C .Li, Mn3O4 anchored on carbon nanotubes as an electrode reaction catalyst of V (IV)/V(V) couple for vanadium redox flow batteries Electrochim, J. Acta, 176 (2015) 1434–40.
 V. Subramanian, S.C. Hall, S. P. Rambabu, Mesoporous anhydrous RuO2 as a super capacitor electrode material, J. Solid State Ion, 175 (2004) 511–5.
 S .Chaudhary, D .Rohilla, V.Umar, K.N. Shanavas, Synthesis and characterizations of luminescent copper oxide nanoparticles: toxicological profiling and sensing applications Ceram, Int. 45 (2019) 15025–35.
 R. Kanwar, R. Bhar, and S. Mehta, Designed meso-macroporous silica framework impregnated with copper oxide nanoparticles for enhanced catalytic performance, J. Chem Cat Chem , 10 (2018) 2087–95.
 M.A. Kumar, N. A. Kumar, D. A.Kumar, and P. Debabrata, Microwave-assisted solvothermal synthesis of cupric oxide nanostructures for high-performance super capacitor, J. Phys. Chem.C, 122 (2018) 11249–61.
 A. Ch. Nwanya, M. M. Ndipingwi, N. Mayedwa,L.C. Razanamahandry,Ch. O. Ikpo,T Waryo,S.K.O. Ntwampe, E. Malenga, E. Fosso-Kankeu, F. I. Ezema, E. I. Iwuoha, and M. Maaza, Maize (Zea mays L.) Fresh husk mediated biosynthesis of copper oxides: Potentials for pseudo capacitive energy storage, J. Electro him Acta, 30 (2019) 436–48.
 R. D Preeth, M .Shairam, N .Suganya, R .Hootan, R .Kartik, K .Pierre, and S. Rajalakshmi, Green synthesis of copper oxide nanoparticles using sinapic acid: an underpinning step towards antiangiogenic therapy for breast cancer, J. Biol. Inorg. Chem , 24 (2019) 633–45.
 D.Renuga, J .Jeyasundari,A.S. S. Athithan andY. B. A. Jacob, Synthesis and characterization of copper oxide nanoparticles using Brassica oleracea var. italic extract for its antifungal application, J. Mater. Res. Express, 7 (2020) 1.
 L. Theodore, Nanotechnology: basic calculations for engineers and scientists, IEEE Electrical Insulation Magazine J., 22 (2006) 50–51.
  X. Wang, J. Lu, M. Xu, and B. Xing, Sorption of pyrene by regular and nanoscaled metal oxide particles: influence of adsorbed organic matter, J.Environ. Sci. Technol, 42 (2008) 7267–7272.
 C. Dagdeviren, S. W. Hwang, Y. Su, S. Kim, H. Cheng, O. Gur, R. Haney, F. G. Omenetto, Y. Huang, and J. A. Rogers, Transient biocompatible electronics and energy harvesters based on ZnO, J. Engineering Science and Mechanics, Institute for Computational and Data Sciences (ICDS) , 9 (2013) 3398–3404.
 D. Liu, W. Wu, Y. Qiu, S. Yang, Si Xiao, Qu. Wang, Lu Ding, and J. Wang, Surface functionalization of ZnO Nano tetrapod's with photoactive and electro active organic monolayers, J. Langmuir, 24 (2008) 5052–5059.
 G. Bisht, and S. Rayamajhi, ZnO nanoparticles: a promising anti-cancer agent, J. Nano biomedicine (Rij), (2016) 9–20.
 S. Sonia, L J. Kumari, H. Ruckmanib, K. Sivakumara, Antimicrobial and antioxidant potentials of biosynthesized colloidal zinc oxide nanoparticles for a fortified cold cream formulation: a potent Nano cosmeceutical application, J. Mater. Sci. Eng. C Mater. Biol. Appl. 79 (2017) 581–589.
 A. H. Waleed , K. H. Abbas, A. S. Hayder, Ceramic filled polymer matrix composite used for bio-medical application, J. Engineering and Technology,. 29 (2011) 1766-1767.
 S. Kuriakose, D. K. Avasthi, S. Mohapatra, Effects of swift heavy ion irradiation on structural, optical and photo catalytic properties of ZnO–CuO Nano composites prepared by carbothermal evaporation method, Beilstein J. Nanotechnology, 6 (2015) 928–937.
 R. Saravanan, S. Karthikeyan, V.K. Gupta, G. Sekaran, V. Narayanan, A. Stephen, Enhanced photo catalytic activity of ZnO/CuO Nano composite for the degradation of textile dye on visible light illumination, J. Mater. Sci. Eng., 33 (2013) 91–98.
 T. A. Saleh, G. Fadillah, and O. A. Saputra, Nanoparticles as components of electrochemical sensing platforms for the detection of petroleum pollutants: a review, TrAC Trends in Analytical Chemistry, 118 (2019) 194-206.
 V. Apalangya, Y. D. Bensah, and E. Annan, Synthesis and characterization of zinc and copper oxide nanoparticles and their antibacterial activity, Results in Materials, 20 (2020) 30041-8.
 J. Oremusová and M. Vojteková, Density determination of liquids and solids, Manual for laboratory practice, UK , 121 (1999).
 A. A. Abdul Hamead, Fabrication and AFM characterization of selenium recycled Nano particles by pulse laser evaporation and thermal evaporation, J. Mater. Res. Express, 6 (2020) 12.
 H. A.Sallal, A. A. Abdul Hamead, and F. M. Othman, Preparation of Al2O3/MgO Nano-composite particles for bio-applications, J. Engineering and Technology. 38 (2020) 586-583.
 H. Marco, B. Alfons, Differences in grain growth of calcite: a field-based modeling approach, J. Contrib Mineral Petrol, Springer-Verlag , 145 (2003) 600–611.
 R. Lamba, A. Umar, S. K. Mehta, S. K. Kansal, Sb2O3–ZnO Nano spindles: A potential material for photo catalytic and sensing applications, J. Ceram. Int., 41 (2015) 5429–5438.
 A. M. Abdul Majeed, I. F. Hussein, R. O. Abd Al-Jalil, Fabrication of high responsively for MgO NPs/PSi heterojunction device by sol-gel technique, J. silicon-neth, 12 (2019) 1007–1010.
 G. S. Campos, D. C. German, J. A. G. Valenzuela, M. C. Leal, J. L. F. Rios, M. M. Gil, H. Hu, and M. S. Lerma, Controlled synthesis of Mg(OH)2 thin films by chemical solution deposition and their thermal transformation to MgO thin films, J.CERAM INT, 45 (2019) 10356-10363.
 P. A.Tran, L.Sarin, R. H. Hurt, and T. J. Webster, Differential effects of Nano selenium doping on healthy and cancerous osteoblasts in couture on titanium, Int. J. Nano medicine , 5 (2010) 351–358.