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Sep 02, 2014Open    AccessPreprint

Biosynthesis of Copper Nanoparticles and Their Antimicrobial Activity

Parth Parikh, Dipali Zala, Bharat A. Makwana

Development of green nanotechnology is generating interest of researchers toward ecofriendly biosynthesis of nanoparticles. Biomolecules present in plant extracts can be used to reduce metal ions to nanoparticles in a single-step green synthesis process. This biogenic reduction of metal ion to base metal is quite rapid, readily conducted at room temperature and pressure, and easily scaled up. In this study, biosynthesis of stable copper nanoparticles were done using datura


Jun 30, 2014Open    AccessPreprint

Estimation Energy Band Gap of Au/ Nano-Crystal Porous Silicon/Mono-Crystal Silicon Heterojunction

Hasan A. Hadi
Porous silicon layers were fabricated on p-type crystalline silicon wafers using electrochemical etching ECE process. An investigation of the dependence on applied current density to formed PS layer was made. Porosity of the porous silicon layer and thickness were determined gravimetrically. Increasing the etching current density led to increase the surface porosity and thickness.The porosity varies between 44and 77% for current densities between 25 and 85mA/2.The current density-voltage charact...