نتایج جستجو برای: Cu-doped ZnS

تعداد نتایج: 110881  

2015
Lata Wanjari D. P. Bisen Raunak Kumar Tamrakar

Cu doped ZnS Nanoparticles in powder form were prepared by wet chemical route method by using thioglycerol as a capping agent. The prepared powder was characterized by using X-ray diffraction (XRD) analysis. The XRD studies indicated that most of the samples are having cubic phase. The absorption spectra, and photoluminescence behaviour of bulk ZnS, nano ZnS and Cu doped ZnS have been studied. ...

Journal: :physical chemistry research 2014
aziz habibi-yangjeh zahra poormohammadi-ahandani mahsa pirhashemi

ultrasonic-assisted method was applied for preparation of cu+2-doped zns nanoparticles (mole fractions of cu+2 ions are 0.000, 0.015, 0.030 and 0.060) in water as a template-free and green method at 30 min. the prepared nanoparticles were investigated by powder x-ray diffraction (xrd), scanning electron microscopy (sem), energy dispersive x-ray (edx) and uv–vis diffuse reflectance spectra (drs)...

2015
Lata Wanjari D. P. Bisen Raunak Kumar Tamrakar

Pure and copper doped ZnS nanoparticles in powder form were prepared by wet chemical route method by using thioglycerol as a capping agent. The XRD studies indicate that the samples are cubic in nature. The thermoluminescence (TL) behavior of pure and copper doped ZnS has been studied for fixed 10 min UV exposure time; TL glow curve shows a single peak at 165.1°C and 184.3°C temperature respect...

2014
Paulina Ziółczyk Ewa Miller Małgorzata Przybyt

The paper presents a survey of literature on the structure and optical properties of ZnS and copper ion-doped ZnS quantum dots. The effect of other metal dopants on the spectral properties of ZnS:Cu quantum dots was also considered. The influence of such parameters as dopant concentration, temperature of the synthesis and compounds which form or modify the additional layer on dots on spectral p...

2006
Haiying Wang Xiaofeng Lu Yiyang Zhao Ce Wang Alan G. MacDiarmid

ZnS:Cu/Poly(vinyl alcohol) (PVA) composite nanofibers have been successfully prepared by electrospinning technique. The formation of ZnS: Cu/PVA nanofibers were carried out by reacting H2S with Zn(AC)2:Cu/PVA nanofibers, which were electrospun from the mixture aqueous solution of Zn(Ac)2, Cu(Ac)2 and PVA. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray-diffr...

Journal: :The journal of physical chemistry. A 2009
Carley Corrado Yu Jiang Fadekemi Oba Mike Kozina Frank Bridges Jin Z Zhang

Stable water-suspendable Cu+-doped ZnS nanocrystals (NCs) have been synthesized with mercaptopropionic acid (MPA) as a capping molecule. The nanocrystals have been characterized using a combination of experimental techniques including UV-vis and photoluminescence (PL) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), inductively coupled plasma (ICP), and extended X-...

In the present work, a one pot, rapid and room temperature photochemical Synthesis of transition metal (TM; Cu, Mn, Cr)-doped ZnSe/ZnS core/shell nanocrystals (NCs) was reported. FT-IR spectrum confirmed the capping of ZnSe by thioglycolic acid. XRD and TEM analysis demonstrated zinc blende phase NCs with an average size of around 3 and 5 nm for TM:ZnSe and TM:ZnSe/ZnS NCs, respectively. PL spe...

Journal: :Dalton transactions 2014
Naixu Li Longzhou Zhang Jiancheng Zhou Dengwei Jing Yueming Sun

Nanosized photocatalysts have been shown to be important to many modern photocatalytic reactions. Control of the microstructure of the nanocrystals enables regulation of their optical properties and enhancement of specific reactions. Here, Cu(2+)-doped ZnS nanosphere photocatalysts with hierarchical nanostructures and controllable sizes were synthesized via a facile wet-chemical reaction. We de...

2014
Xiaolian Sun Xinglu Huang Jinxia Guo Wenlei Zhu Yong Ding Gang Niu Andrew Wang Dale O. Kiesewetter Zhong Lin Wang Shouheng Sun Xiaoyuan Chen

Construction of self-illuminating semiconducting nanocrystals, also called quantum dots (QDs), has attracted much attention recently due to their potential as highly sensitive optical probes for biological imaging applications. Here we prepared a self-illuminating QD system by doping positron-emitting radionuclide (64)Cu into CdSe/ZnS core/shell QDs via a cation-exchange reaction. The (64)Cu-do...

2006
W. Q. Peng Z. G. Wang

The room-temperature photoluminescence (PL) of copper doped zinc sulfide (ZnS:Cu) nanoparticles were investigated. These ZnS:Cu nanoparticles were synthesized by a facile wet chemical method, with the copper concentration varying from 0 to 2 mol%. By Gaussian fitting, the PL spectrum of the undoped ZnS nanoparticles was deconvoluted into two blue luminescence peaks (centered at 411 nm and 455 n...

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