نتایج جستجو برای: Nanostructures

تعداد نتایج: 19096  

Journal: :journal of reports in pharmaceutical sciences 0
mahsa azami department of pharmaceutics, faculty of pharmacy, kermanshah university of medical sciences, kermanshah, iran elham arkan nano drug delivery research center, kermanshah university of medical sciences, kermanshah, iran

this review reports recent advances in metallic nanostructures based electrochemical sensors. interesting aspects of nps include size and shape-dependent interatomic bond distances, melting points, chemical reactivity, and optical and electronic properties. the small size of metallic nanostructures has allowed nanoscale electrochemical processes to be probed. electrochemical characteristics can...

Journal: :iranian chemical communication 2014
mohamad mohsen momeni ali kazempoor mahboubeh mirhosseini mohadesah hakimiyan zohre nazari

cupper oxide structures with a variety of novel morphologies are synthesized using cupper foil as substrate via a solution route. the structure, morphology and phase of the as-synthesized nanostructures are analyzed by various techniques. sem images show gradual development of hierarchical structures of copper oxide with different morphology. in order to study the effect of reaction time and te...

Journal: :journal of nanostructures 2016
m. ahmadi golsefidi f. abbasi m. abrodi z. abbasi f. yazarlou

in this pepper fe2o3 nanoparticles were synthesized via a fast microwave method. then fe2o3-tio2 nanocomposites were synthesized by a sonochemical-assisted method. the prepared products were characterized by x-ray diffraction pattern, scanning electron microscopy and fourier transform infrared spectroscopy. the photocatalytic behaviour of fe2o3-tio2 nanocomposites was evaluated using the degrad...

Journal: :international journal of nano dimension 0
n. parsafar research institute of applied sciences, academic center of education, culture and research (acecr), shahid beheshti university, tehran, iran. a. ebrahimzad research institute of applied sciences, academic center of education, culture and research (acecr), shahid beheshti university, tehran, iran.

tellurium nanostructures have been prepared by physical vapor deposition method in a tube furnace. the experiments were carried out under argon gas flow at a pressure of 1 mbar. tellurium powder was evaporated by heating at 350°c and 430°c and was condensed on substrates at 110–250°c, in the downstream of argon gas flow. the products were characterized by field emission scanning electron micros...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - پژوهشکده علوم پایه کاربردی 1388

موضوع ترابرد الکتریکی، ترموالکتریکی و ترمومغناطیسی یکی از موضوعات مهم در علم نانوترموالکترونیک می باشد. با دانستن هر چه بیشتر خواص ترمومغناطیسی مواد، می توان تحولات اساسی در صنعت الکترونیک ایجاد کرد و باعث طراحی دقیقتر و بهتر ادوات الکتریکی اپتوالکترونیکی وابسته به اسپین در مقیاس نانو شد. اندازه گیری کمیت های ترموالکتریکی مانند توان ترموالکتریک، در ساختارهایی با ابعاد پایین، به دلیل کاربرد فراو...

Journal: :international journal of nano dimension 0
m. s. sadjadi department of chemistry, science and research branch, islamic azad university, tehran, iran. m. meskinfam department of chemistry, faculty of science, lahijan branch, islamic azad university , lahijan, iran. h. jazdarreh department of chemistry, faculty of science, lahijan branch, islamic azad university , lahijan, iran.

bone like hydroxyapatite (nhap) was synthesized via an in situ biomimetic process in presence of wheat starch. the effect of polymer concentration alteration on the final structure of nhap was investigated. formation of the nhap at room temperature was confirmed by x-ray diffraction (xrd) and fourier transform infrared spectroscopy (ft-ir). size and morphology of the nhap samples were character...

Fatima Allawi, M. A. Mahdi, M.J Kadhim, Sami Najah Abaas,

     Zinc Oxide (ZnO) nanorods and titanium dioxide (TiO2) nanostructures thin films were prepared onto glass substrates by the chemical bath deposition (CBD) method. The ZnO was structured as nanorods (NRs) while TiO2 was formed as nanoflowers plate as confirmed by Field-Emission Scanning Electron Microscope (FESEM) images. The ZnO/Fe3O4 and TiO2/Fe3O4 nanostructures thin films were prepared v...

Journal: :international journal of nano dimension 0
m. enhessari department of chemistry, naragh branch, islamic azad university, naragh, iran. a. parviz department of chemistry, naragh branch, islamic azad university, naragh, iran. k. ozaee young researchers club, naragh branch, islamic azad university, naragh, iran. h. habibi abyaneh department of chemistry, payame noor university, delijan, iran.

nowadays various methods are presented for synthesis of barium strontium titanate (bst) nanopowders with different morphology and properties. each of these (bst)s has got individual characterization that makes it suitable for a special application. every method has a special quality, causes it to have preference over the other methods. low processing temperature is a desired point which most of...

Journal: :journal of nanostructures 2012
m. mousavi-kamazani m. salavati-niasari d. ghanbari

cuins2 nanostructures were  synthesized  via  a  simple  surfactant-free solvothermal  route.  in  this  synthesis,  thiosemicarbazide  and thioglycolic acid were used as sulfur sources. the effects of different parameters such as type of precursor and time on the morphology and particle  size  of  the  samples  have  been  investigated.  the nanostructures  were  characterized  by  means  of  ...

Journal: :international journal of nanoscience and nanotechnology 2012
m. hatami m. h. majles ara a. rostami m. dolatyari m. mahmudi

well-defined crystalline pbse nanocubes and nanospheres have been synthesized through a simple hydrothermal method by using pb2+- edta and pb2+- oleylamine complexes at 180°c for different reaction times. composition and morphology of the samples have been characterized by means of xrd and sem. gradual release process of pb2+ from pb2+-edta and pb2+-oleylamine complexes can adjust the growth ra...

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