A universal method for the synthesis of metal and metal sulfide clusters embedded in polymer matrices

2003 ◽  
Vol 13 (12) ◽  
pp. 2927 ◽  
Author(s):  
Gianfranco Carotenuto ◽  
Brunetto Martorana ◽  
Piero Perlo ◽  
Luigi Nicolais
Keyword(s):  
Metal Sulfide ◽  
Polymer Matrices ◽  
Universal Method ◽  
Sulfide Clusters

scholarly journals Low-Temperature Synthesis of Highly Efficient, Deep-Red Zn-Cu-In-Se/ZnSe Fluorescence Quantum Dots

NANO ◽  
2019 ◽  
Vol 14 (06) ◽  
pp. 1950070
Author(s):  
Juan Yang ◽  
Jingling Li ◽  
Yanqing Zhu ◽  
Xueqing Xu ◽  
Xiudi Xiao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Low Temperature ◽  
Synthesis Method ◽  
Metal Sulfide ◽  
Intrinsic Defect ◽  
Core Shell ◽  
Nonradiative Recombination ◽  
Zn Doping ◽  
Sulfide Clusters ◽  
The One

We report a facile synthesis method on CuInSe2 (CISe)-based quantum dots (QDs) by using tri-[Formula: see text]-octylphosphine selenium (TOPSe) as selenide precursor, with assistance of oleylamine (OAm) and [Formula: see text]-dodecanethiol (DDT). We demonstrate that the OAm and DDT jointly contribute to the formation of the low-temperature-decomposable metal-sulfide clusters, and promote the QD nucleation at relatively low temperature range of 180–200∘C. Furthermore, to improve fluorescence property, Zn-doping and ZnSe coating are simultaneously carried out. The obtained deep-red ZnCISe/ZnSe QDs possess higher quantum yield of 65% at wavelength of 670[Formula: see text]nm, which is in the best performance range ever reported. Then, we investigate the improvement mechanism, where the sufficient Zn replacement of In sites is the crucial factor. This modified core–shell structure provides two benefits, on the one hand, the enhancement on intrinsic defect-related recombination, and the other hand, the improved core–shell interface that reduces the nonradiative recombination.

Transition metal sulfide clusters below the cluster-platelet transition: Theory and experiment

2010 ◽  
Vol 247 (5) ◽  
pp. 1069-1076 ◽  
Author(s):  
Sibylle Gemming ◽  
Gotthard Seifert ◽  
Matthias Götz ◽  
Tim Fischer ◽  
Gerd Ganteför
Keyword(s):  
Transition Metal ◽  
Metal Sulfide ◽  
Transition Theory ◽  
Transition Metal Sulfide ◽  
Sulfide Clusters ◽  
Theory And Experiment

Multistep synthesis of metal sulfide clusters: A novel zeolite modification method

2010 ◽  
Vol 46 (8) ◽  
pp. 878-884 ◽  
Author(s):  
A. B. Ponomaryov ◽  
V. E. Vakhmistrov ◽  
M. V. Shostakovsky ◽  
V. N. Kalinin ◽  
E. S. Mortikov
Keyword(s):  
Metal Sulfide ◽  
Multistep Synthesis ◽  
Modification Method ◽  
Sulfide Clusters ◽  
Zeolite Modification

scholarly journals Nanocomposites Based on Metal and Metal Sulfide Clusters Embedded in Polystyrene

Polymers ◽  
2011 ◽  
Vol 3 (3) ◽  
pp. 1352-1362 ◽  
Author(s):  
Gianfranco Carotenuto ◽  
Cinzia Giannini ◽  
Dritan Siliqi ◽  
Luigi Nicolais
Keyword(s):  
Metal Sulfide ◽  
Sulfide Clusters

scholarly journals Dispersion of nanoparticles in optically transparent polymer matrices

Radiotekhnika ◽  
2021 ◽  
pp. 105-114
Author(s):  
V.M. Borshchov ◽  
O.M. Listratenko ◽  
M.A. Protsenko ◽  
I.T. Tymchuk ◽  
O.V. Kravchenko ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Solid Phase ◽  
Hybrid Composites ◽  
Low Cost ◽  
Experimental Studies ◽  
Polymer Matrices ◽  
Inorganic Filler ◽  
Universal Method ◽  
Colloidal Solutions ◽  
Optically Transparent

Search and analysis of results of theoretical and experimental studies, materials of dissertations, literature sources and patents in the field of optical and optoelectronic instrumentation were carried out. Obtained data and recommendations on the development of methods for dispersing nanoparticles into polymer matrices for the creation of optically transparent nan composites for use in many fields of science and technology are generalized. Analysis of considered results makes it possible to conclude that for creating hybrid organic-inorganic composites with high level of dispersion of inorganic component, it is necessary to solve problems relating to compatibility of components and stabilization of filler nanoparticles in polymer matrix. Due to the limited range of hydrophilic polymers capable of forming composites with nanoparticles without stabilizers, the main approaches to the preparation of hybrid composites are using modifying additives of surfactants, as well as complex chemical reactions on the surface of inorganic filler nanoparticles. Such methods of obtaining nanocomposites with nanoparticles are laborious and involve formation of by-products and additional purification. It is shown that titanium dioxide (TiO2) and zinc oxide (ZnO) are of great interest among a large number of nanodispersed fillers of polymer matrices in preparing composite materials. There are many methods for synthesis of ZnO and TiO2 nanoparticles with various shapes and sizes, including laser ablation method, which is convenient and universal method for preparing nanosuspensions of solid-phase materials in liquid. Advantages over other methods for nanoparticle synthesis, such as the simplicity of method, environmental friendliness, low cost, and the ability to obtain cleaner colloidal solutions without using surfactants and other impurities, have made laser ablation in a liquid medium very popular among researchers.

Synthesis and characterization of metal sulfide clusters for toxicological studies

2002 ◽  
Vol 21 (4) ◽  
pp. 693-699 ◽  
Author(s):  
Karl C. Bowles ◽  
Russell A. Bell ◽  
Michael J. Ernste ◽  
James R. Kramer ◽  
Helen Manolopoulos ◽  
...  
Keyword(s):  
Metal Sulfide ◽  
Synthesis And Characterization ◽  
Toxicological Studies ◽  
Sulfide Clusters
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