نتایج جستجو برای: ZnS Coverage

تعداد نتایج: 89231  

2016
Deok-Yong Cho Lifei Xi Chris Boothroyd Beata Kardynal Yeng Ming Lam

We have investigated the chemical state of In(Zn)P/ZnS core/shell nanocrystals (NCs) for color conversion applications using hard X-ray absorption spectroscopy (XAS) and photoluminescence excitation (PLE). Analyses of the edge energies as well as the X-ray absorption fine structure (XAFS) reveal that the Zn(2+) ions from ZnS remain in the shell while the S(2-) ions penetrate into the core at an...

Modaresi M, Parivar K Taheri J Valipoor A,

Background: Quantum dots are commonly composed of cadmium contained semiconductors. Cadmium is potentially hazardous but toxicity of such quantum dots is not yet systematically investigated. On the other hand, in vitro studies have shown almost complete control of CdSe induced cytotoxicity by ZnS coverage. Toxicity of CdSe quantum dots and controlling this toxicity by ZnS coverage in immature m...

2003
A. V. Baranov S. I. Vavilov J. F. Donegan T. S. Perova R. A. Moore D. V. Talapin A. L. Rogach Y. Masumoto I. Nabiev

The evolution of the optical phonon spectra of colloidal core/shell CdSe/ZnS quantum dots with an increase of the shell thickness from 0.5 to 3.4 monolayers has been studied by resonant Raman spectroscopy. The results obtained suggest that the ZnS shell changes its structure from amorphous to partly crystalline as the thickness increases. Simultaneously, an increase in Raman scattering by surfa...

2008
S. Clarke S. Koshy J. Zhang N. Cohen J. Nadeau

(CdSe)ZnS-Dopamine. Photoluminescence. Photoenhancement. Living Cell CdSe(ZnS) quantum dots conjugated to the electron donor dopamine show enhancement of photoluminescence over a time course of seconds to minutes when exposed to ultraviolet or blue irradiation. This phenomenon is observed when the dots are in aqueous solution as well as after endocytosis by living cells. The rate of enhancement...

2011
Günther Slesak Saythong Inthalad Phadsana Basy Dalaphone Keomanivong Ounheaun Phoutsavath Somchaivang Khampoui Aude Grosrenaud Vincent Amstutz Hubert Barennes Yves Buisson Peter Odermatt

BACKGROUND We evaluated the Ziehl-Neelsen staining (ZNS) technique for the diagnosis of paragonimiasis in Laos and compared different modifications of the ZNS techniques. METHODOLOGY WE APPLIED THE FOLLOWING APPROACH: We (1) examined a paragonimiasis index case's sputum with wet film direct examination (WF) and ZNS; (2) re-examined stored ZNS slides from two provinces; (3) compared prospectiv...

2017
Yu-Kuang Liao Yung-Tsung Liu Dan-Hua Hsieh Tien-Lin Shen Ming-Yang Hsieh An-Jye Tzou Shih-Chen Chen Yu-Lin Tsai Wei-Sheng Lin Sheng-Wen Chan Yen-Ping Shen Shun-Jen Cheng Chyong-Hua Chen Kaung-Hsiung Wu Hao-Ming Chen Shou-Yi Kuo Martin D. B. Charlton Tung-Po Hsieh Hao-Chung Kuo

Most thin-film techniques require a multiple vacuum process, and cannot produce high-coverage continuous thin films with the thickness of a few nanometers on rough surfaces. We present a new "paradigm shift" non-vacuum process to deposit high-quality, ultra-thin, single-crystal layers of coalesced sulfide nanoparticles (NPs) with controllable thickness down to a few nanometers, based on thermal...

Journal: :Nanoscale 2014
Xing Huang Marc-Georg Willinger Hua Fan Zai-lai Xie Lei Wang Achim Klein-Hoffmann Frank Girgsdies Chun-Sing Lee Xiang-Min Meng

Synthesis of ZnO/ZnS heterostructures under thermodynamic conditions generally results in the wurtzite (WZ) structure of the ZnS component because its WZ phase is thermodynamically more stable than its zinc blende (ZB) phase. In this report, we demonstrate for the first time the preparation of ZnO/ZnS coaxial nanocables composed of single crystalline ZB structured ZnS epitaxially grown on WZ Zn...

2012
A. Behjat M. Neghabi

The effects of ZnS/Metal/ZnS multilayer anodes, including ZnS/Au/ZnS (ZAuZ), ZnS/Ag/ZnS (ZAgZ) and ZnS/Cu/ZnS (ZCuZ) on device performance in organic light emitting diodes based on rubrene were investigated systematically. The device with ZAuZ as anode gave an improved performance comparable with ITO based devices. A low driving voltage of 5.61 V and a high luminance of 1836 cd/m were obtained ...

2015
Jun Lee Chang-Soo Han

We report a highly bright and stable aqueous dispersion of CuInS2/ZnS (CIS/ZnS) nanocrystals (NCs) using surfactant-assisted microemulsion and cold treatment. CIS/ZnS NCs were facilely synthesized via a stepwise, consecutive hybrid flow reactor approach. To stabilize the optical properties of hydrophobic CIS/ZnS NCs, cetyltrimethylammonium bromide (CTAB) was chosen as a matrix for aqueous phase...

2012
Petr Praus Ondřej Kozák

O nanocompósito de partículas de ZnS estabilizadas por íons cetiltrimetilamônio (ZnS-CTA) e montmorilonita (ZnS−CTA−MMT) foi preparado e usado como catalisador na fotodecomposição de fenol sob radiação UV de uma lâmpada de Hg de pressão média. A quantidade de ZnS em ZnS−CTA−MMT foi aproximadamente 6 wt.%. Para comparação, a fotodecomposição foi também realizada com ZnS−CTA, montmorilonita e sem...

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