Congratulations:
Happy New Year
Best wishes for a healthy and prosperous new year with warmest greetings
2012: joy, cheer, prosperity and peace
(Quran: All Imran: 45)
Keyhan Special Interview:
University specialization
for research development
November 11, 1987
This interview is in persian. For more information please see Persian version.
The role and importance of research in various communities, particularly Iran, is a clearly known issue without any need to mention. Stability and flourishing of research in its true position requires sustained effort of all those especially involved in investigation affairs. These efforts will not bear fruits unless all facilities, human resources, etc. is evaluated and assistance and coordination of all centers that actively participate in different areas of research activity support this endemic movement.Solar Cell:
Fabrication of dye sensitized
solar cell by titanium oxide
nanostructures
Low- cost high-efficiency light absorber
materials for generation of electricity
and disinfection of water.
March 20, 2011
Degradation of dye contaminants under UV light illumination and enhancement of charge separation efficiency, charge carriers lifetime, photocatalytic activity and interfacial charge transfer by coupling of semiconductors have helped fabrication of new type of photoelectrochemical system using nanostructured substances with great consideration of efficiency and cost of manufacture.US Patent:
Fabrication of NiO Nanoparticles and Chip-Like Nanoflakes by Solvothermal Technique
December 31, 2009
A method is disclosed for fabrication of NiO nanoparticles and NiO chip-like nanoflakes by solvothermal technique. Mixed organic alcohols were used as solvent to make a homogenous solution from a nickel containing complex for production of NiO nanoparticles and chip-like nanoflakes. The solution was heated in a sealed flask sitting inside a warm furnace. The precipitate was filtered, rinsed, dried and calcined to produce nanoparticles or nanoflakes.Recent Article:
Synthesis of Wide Bandgap Nanocrystalline
NiO Powder via Sonochemical Method
S. Mohseni Meybodi, S.A. Hosseini, D. Mohammadyani, M. Rezaee and S.K. Sadrnezhaad
Cubic shaped nano-crystalline nickel oxide of wide band-gap was synthesized from Ni(OH)2 precursor via sonochemical method. Nickel vacancy detected in photoluminescence spectra confirmed p-type property of the semiconductor product.
.jpg)
Journal and Conference Links
Nanomaterials
The seeding effect on the microstructure and photocatalytic properties of ZnO nano powders
S. Khameneh Asl, S.K. Sadrnezhaad, M. Kianpourrad
Materials Letters, Volume 64, Year 2010, Pages 1935–1938
Nano sized ZnO powders, with suitable amount of TiO2 (P25), have been successfully synthesized via a novel modified hydrothermal method by using zinc acetate. Titania nano powder plays an important role in fabrication of ZnO nano structure. The structure and morphology of the product were characterized by X-ray diffraction and scanning electron microscopy, which show different morphologies and particle sizes. Photocatalytical properties of the product exhibit strong improvement in the reactivity of seeded powders. These powders have better properties because of coupling effect of semiconductors, small powder size and reduced recombination of electron-hole in the surface of a catalyst.Pictures
