نتایج جستجو برای: نانودرات zns

تعداد نتایج: 2976  

2010
Katrin Pechstedt Tracy Whittle Jeremy Baumberg Tracy Melvin

An investigation of the photoinduced fluorescence enhancement (PFE) behavior of CdSe/ZnS core/shell quantum dots deposited at low densities, under anhydrous and controlled water humidity, under oxygen or argon, is presented. The photoluminescence properties of CdSe/ZnS QDs are highly dependent upon the local gaseous environment. Under anhydrous conditions, under either oxygen or argon, there wa...

2017
JingLun Li JiaoJiao Deng JinXian Yuan Jie Fu XiaoLing Li AiPing Tong YueLong Wang YangMei Chen Gang Guo

Spinal cord injury (SCI) commonly leads to lifelong disability due to the limited regenerative capacity of the adult central nervous system. Nanomicelles can be used as therapeutic systems to provide effective treatments for SCI. In this study, a novel triblock monomethyl poly(ethylene glycol)-poly(l-lactide)-poly(trimethylene carbonate) copolymer was successfully synthesized. Next, polymeric n...

2017
Tetyana V. Torchynska

Photoluminescence, its excitation power dependence, and Raman scattering spectra have been studied in CdSe/ZnS and CdSeTe/ZnS QDs for the nonconjugated states and after the QD conjugation to the anti-Interleukin-10, Human papilloma virus and Pseudo rabies virus antibodies. The QD bioconjugation to charged antibodies stimulates the “blue” energy shift of PL bands related to exciton emission in t...

2012
A. S. Opanasyuk D. I. Kurbatov M. M. Ivashchenko I.Yu. Protsenko H. Cheong

The paper presents complex investigation of optical characteristics and some structural parameters of ZnS and ZnSe films obtained by the close-spaced sublimation technique under different growth condition. Investigation of optical characteristics was carried out in the 350-900 nm wavelength range for ZnS and 300-600 nm for ZnSe. Spectral distributions of transmission Т( ) and reflection spectra...

2012
DEZHI QIN GUANGRUI YANG GUOXU HE LI ZHANG QIUXIA ZHANG LUYAO LI

Ag-doped ZnS nanocrystals were synthesized by hydrothermal method in propanetriol solutions. X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) characterizations were used to determine the structure and morphology of ZnS: Ag nanocrystals. The as-prepared nanoparticles are approx...

2017
Oleh Shpotyuk Adam Ingram Zdenka Bujňáková Peter Baláž

Microstructure hierarchical model considering the free-volume elements at the level of interacting crystallites (non-spherical approximation) and the agglomerates of these crystallites (spherical approximation) was developed to describe free-volume evolution in mechanochemically milled As4S4/ZnS composites employing positron annihilation spectroscopy in a lifetime measuring mode. Positron lifet...

The relatively low power conversion efficiency (PCE) of quantum dot sensitized solar cells (QDSSCs) is attributed to charge recombination at the interfaces. Charge recombination process could be suppressed by coating the QD layer with a wide band gap semiconductor such as ZnS, which acts as a blocking layer between the QDs and hole transport material (HTM). In present study, to improve PCE of P...

Journal: :The Analyst 2010
Suresh Kumar Kailasa Hui-Fen Wu

For the first time, we report the applications of Mn(2+)-doped ZnS@cysteine nanoparticles (NPs) as matrices for analysis of coccidiostats (lasalocid, monensin, salinomycin and narasin) and peptide mixtures (Met-enk, Leu-enk, HW6 and gramicidin) in surface-assisted laser desorption/ionization time-of-flight mass spectrometry (SALDI-TOF MS). The Mn(2+)-doped ZnS@cysteine NPs have been successfull...

2015
Yanjie Yang Shuang-Yu Lv Bianfei Yu Shuang Xu Jianmin Shen Tong Zhao Haixia Zhang

Doped ZnS quantum dots (QDs) have a longer dopant emission lifetime and potentially lower cytotoxicity compared to other doped QDs. The liver is the key organ for clearance and detoxification of xenobiotics by phagocytosis and metabolism. The present study was designed to synthesize and evaluate the hepatotoxicity of Mn-doped ZnS QDs and their polyethylene glycol-coated counterparts (1 mg/kg an...

2018
Eloísa Berbel Manaia Renata Cristina Kiatkoski Kaminski Bruno Leonardo Caetano Marina Magnani Florian Meneau Amélie Rochet Celso Valentim Santilli Valérie Briois Claudie Bourgaux Leila Aparecida Chiavacci

ZnO/ZnS heterostructures have emerged as an attractive approach for tailoring the properties of particles comprising these semiconductors. They can be synthesized using low temperature sol-gel routes. The present work yields insight into the mechanisms involved in the formation of ZnO/ZnS nanostructures. ZnO colloidal suspensions, prepared by hydrolysis and condensation of a Zn acetate precurso...

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