نتایج جستجو برای: doped zns

تعداد نتایج: 50881  

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...

2002
V. L. Kalashnikov E. Sorokin I. T. Sorokina

The Kerr-lens mode locking stability and the ultrashort pulse characteristics are analyzed numerically for the Cr-doped ZnTe, ZnSe, ZnS active media. The advantages of these materials for the femtosecond lasing within 2-3 µm spectral range are demonstrated.

Journal: :Chemical communications 2013
Suresh Sarkar Amit K Guria Narayan Pradhan

Doped and undoped ZnS semiconductor nanocrystals having different recombination pathways are explored to study the charge transfer reaction between the nanocrystals and the 4-nitrophenol/sodium borohydride redox couple.

2014
L. Sujata Devi Nomita Devi Indrajit Sharma H. Nandakumar Sarma

Zinc Sulphide (ZnS) nanoparticles doped with different concentrations of Mn (0%, 2%, 4%, 6%, 8%, 10%) have been synthesized by chemical co-precipitation method using polyvinyl alcohol (PVA) as a capping agent to control the particle growth. The structural characterizations of as synthesized nanoparticles are determined by X-ray diffraction (XRD) which showed cubic zinc blende structures with av...

2003
V. L. Kalashnikov E. Sorokin I. T. Sorokina

The Kerr-lens mode locking ability and the ultrashort pulse characteristics are analyzed numerically for the Cr-doped ZnTe, ZnSe, ZnS active media. The advantages of these materials for the femtosecond lasing within 2-3 µm spectral range are demonstrated.

2011
Bong Je Park Seok Seo Joon Tae Ahn Jung Ho Song Woon Jin Chung Duk Young Jeon

ZnS:Cu,Cl,Mn,Te, which shows red AC powder electroluminescence (ACPEL) emission, was synthesized using a conventional wet synthesis and a sealed vessel method. The photoluminescence (PL) and ACPEL were characterized. After the second firing, 0.5 wt% tellurium (Te)-doped ZnS: Cu,Cl,Mn,Te phosphor shows almost red PL emission from the T1– A1 transition of Mn 21 ions, which are affected by the Te....

Journal: :Optics express 2016
Xiao Li Yan Li Ying Xiang Na Rong Pengcheng Zhou Shuxin Liu Jiangang Lu Yikai Su

In this paper, we demonstrate a dynamic holographic display in a quantum dot (ZnS/InP) doped liquid crystal device, where one of the interior cell surfaces is covered by a ZnSe layer. Such a hybrid device shows substantially improved photorefractive sensitivity of 2.2 cm3/J, which is almost 300 times larger than that in ZnS/InP doped liquid crystal device without the ZnSe layer. The ...

2016
Hayriye Eda ŞATANA Burak DEMİRHAN Buket ER DEMİRHAN

L-cysteine–capped Mn-doped ZnS quantum dots (QDs) were used for the determination of glutamic acid in foodstuffs. This method is based on measurement of the quenching of the phosphorescence intensity of the QDs after interacting with glutamic acid. A linear response was observed from 50 to 500 ng mL−1 glutamic acid with a limit of detection of 6.79 ng mL−1 . Room temperature phosphorescence (RT...

2017
Harish Kumar

The most significant process for optical coating is variant of vacuum deposition. Zinc sulphide having direct and large band gap which is use in opto electronics. By using ZnS material in thermal evaporation technique and characterizing the minimum reflectance and maximum transmittance in visible wavelength and energy gap increases with increasing thickness having direct and large band gap. Whe...

Journal: :Angewandte Chemie 2006
Daniel Moore Yong Ding Zhong Lin Wang

Wurtzite-structured materials, such as ZnO, ZnS, GaN, and AlN, have an important characteristic: the presence of polar surfaces that result from cationor anion-terminated atomic planes. Consequently, a series of novel nanostructures, such as nanosprings, nanorings, nanohelices, and nanobows, have been formed. The mechanism that drives the formation of these novel configurations minimizes the el...

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