نتایج جستجو برای: nanocrystals of zinc oxide

تعداد نتایج: 21195295  

2009
J. Pedersen K. S. Teh

Growth of a multitude of zinc oxide nanostructures has been achieved without the use of catalysts at atmospheric pressure in less than 10 minutes at low power (65WRF) in an inductive heating apparatus. Scanning electron microscopy shows an array of nanostructures including nanocrystals, tetrapods, telescopic tetrapods, and nanowires which do not appear to be terminated with a catalyst. X-ray di...

2011
Raid A. Ismail Abdulrahman K. Ali Mukhlis M. Ismail Khaleel I. Hassoon

Pulsed laser ablation in liquid was employed to synthesize zinc oxide (ZnO) nanocolloidal suspension. Colloidal ZnO nanocrystals are synthesized by pulsed laser ablation of high purity zinc target in double distilled water with various laser fluences at RT. UV–visible absorption and transmission electron microscope are used for the characterization of colloidal ZnO nanoparticles (NPs). The opti...

2011
Jian Dong Wang Da Li Jin Ku Liu Xiao Hong Yang Jia Luo He Yi Lu

The surface-modified zinc phosphate (Zn3(PO4)2) nanocrystals were synthesized by a facile and efficient one-step ultrasonic-template-microwave (UTM) assisted route. The crystal structure, optical properties and morphologies of zinc phosphate nanocrystals were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and transmission electron microscope. And...

2013
Fengrui Jiang Guolong Tan

Herein we present an unusual phosphine-free method to fabricate water soluble CdSeS nanocrystals in cubic structure. In this method, glycerin was used as a stabilizing agent replacing tri-n-octylphosphine oxide (TOPO). Water solution of Na2SeO3 in polyethylene glycol was utilized as Se source. 3-Mercaptopropionic acid (MPA) provides S source. The phosphine-free Se and S sources were found to be...

2014
Ali Khorsand Zak Abdul Manaf Hashim Majid Darroudi

UNLABELLED Pure zinc oxide and zinc oxide/barium carbonate nanoparticles (ZnO-NPs and ZB-NPs) were synthesized by the sol-gel method. The prepared powders were characterized by X-ray diffraction (XRD), ultraviolet-visible (UV-Vis), Auger spectroscopy, and transmission electron microscopy (TEM). The XRD result showed that the ZnO and BaCO3 nanocrystals grow independently. The Auger spectroscopy ...

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
حسین نعمت اللهی h neamatollahi . [email protected] ناهید رمضانی n ramazani

introduction: ferric sulfate pulpotomy is a safe and effective method of the pulpotomy of primary teeth. but the results of different studies indicate low success rate of ferric sulfate pulpotomy in comparison to formocresol pulpotomy and a portion of these failures may be related to stimulating and harmful effects of zinc oxide eugenol paste. the aim of this study was to determine and compare ...

Journal: :avicenna journal of medical biotechnology 0

background: antibiotic resistant bacteria can be considered as a main problem in infection management. zinc oxide nanoparticles (zno nps), individually or in combination with antibiotics, can be considered as good candidates for struggling against drug resistant bacteria. methods: in this study, zinc oxide nanoparticles were synthesized using sol-gel method in low temperature as a cost effectiv...

Journal: :The journal of physical chemistry. B 2005
Tamar Andelman Yinyan Gong Mark Polking Ming Yin Igor Kuskovsky Gertrude Neumark Stephen O'Brien

Nanocrystals of the wide band gap semiconductor zinc oxide of controllable morphologies were synthesized by a simple thermal decomposition method. The predominating factor in determining the morphology (spheres, triangular prisms, and rods) was the solvent, selected on the basis of coordinating power. The nanoparticles were structurally analyzed, and the photoluminescence of each shape was comp...

Journal: :تولید گیاهان زراعی 0
فریده بهبودی فارغ التحصیل کارشناسی ارشد گروه زراعت، دانشگاه تهران ایرج اله دادی دانشیار گروه زراعت، دانشگاه تهران ابراهیم محمدی گل تپه استاد گروه بیماری شناسی گیاهی، دانشگاه تربیت مدرس، تهران

in order to study the effect of vermicompost containing copper oxide and zinc oxide nanoparticles on was beans, in an experiment factorial were done based on a randomized complete block design in three replications. the experiment treatment were as follows: nanoparticles in 4 levels (0, 0.4, 0.8 and 1.2 g/kg weight of substrate), vermicompost in 3 levels (2.5, 5 and 7.5 g/kg-1 weight of substra...

Journal: :The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society 2005
Gorm Danscher Meredin Stoltenberg

In vivo-applied sodium selenide or sodium selenite causes the appearance of zinc-selenium nanocrystals in places where free or loosely bound zinc ions are present. These nanocrystals can in turn be silver enhanced by autometallographic (AMG) development. The selenium method was introduced in 1982 as a tool for zinc-ion tracing, e.g., in vesicular compartments such as synaptic vesicles of zinc-e...

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