СOLLOIDAL SYNTHESIS AND CHARACTERIZATION HYDROPHILIC CDTE QUANTUM DOTS FOR MEDICAL DIAGNOSTICS

2019 ◽  
pp. 42-52
Author(s):  
S.A. Novikova ◽  
E.D. Gribova ◽  
E.V. Andreev ◽  
R.V. Novichkov ◽  
P.P. Gladyshev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Thioglycolic Acid ◽  
Medical Diagnostics ◽  
Organic Medium ◽  
Synthesis And Characterization ◽  
Exciton Peak ◽  
Additional Time ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Average Size

The present article deals with colloidal quantum dots (QDs) synthesized in an aqueous medium using thioglycolic acid (TGA), L-cysteine (L-cys) and mercaptoethylamine (MEA) as stabilizers. In contrast to high-temperature synthesis in an organic medium, this method of synthesis enables us to skip an additional time-consuming stage of hydrophilization of QDs. The resulting CdTe QDs were studied by spectroscopic methods of analysis. In the absorption spectra of the QDs there is an exciton peak. The average size of the QDs, which is about 3-4 nm, was calculated based on the position of the exciton peak, the zeta potential of the QDs was measured.

scholarly journals Multianvil High-Pressure/High-Temperature Synthesis and Characterization of multiferroic HP-Co3TeO6

2021 ◽  
Author(s):  
Gunter Heymann ◽  
Elisabeth Selb ◽  
Toni Buttlar ◽  
Oliver Janka ◽  
Martina Tribus ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Type Structure ◽  
Synthesis And Characterization ◽  
Temperature Synthesis ◽  
Space Group ◽  
Crystal System ◽  
High Temperature Synthesis ◽  
High Pressure High Temperature

By high-pressure/high-temperature multianvil synthesis a new high-pressure (HP) phase of Co3TeO6 was obtained. The compound crystallizes in the acentric trigonal crystal system of the Ni3TeO6-type structure with space group R3...

High-temperature synthesis and characterization of boron suboxide (B6O) and boron containing hard materials

2019 ◽  
Vol 16 ◽  
pp. 95-101
Author(s):  
Jelena Maletaškić ◽  
Jelena Luković ◽  
Katsumi Yoshida ◽  
Toyohiko Yano ◽  
Ryosuke S.S. Maki ◽  
...  
Keyword(s):  
High Temperature ◽  
Synthesis And Characterization ◽  
Temperature Synthesis ◽  
Hard Materials ◽  
High Temperature Synthesis ◽  
Boron Suboxide

scholarly journals High-Pressure, High-Temperature Synthesis and Characterization of Polar and Magnetic LuCrWO6

2020 ◽  
Vol 59 (6) ◽  
pp. 3579-3584
Author(s):  
Sun Woo Kim ◽  
Xiaoyan Tan ◽  
Corey E. Frank ◽  
Zheng Deng ◽  
Huaiyu Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Synthesis And Characterization ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
High Pressure High Temperature

scholarly journals IR Luminescence of Polyfunctional Associates of Indocianine Green and Ag-=SUB=-2-=/SUB=-S Quantum Dots-=SUP=-*-=/SUP=-

2020 ◽  
Vol 128 (8) ◽  
pp. 1200
Author(s):  
T.S. Kondratenko ◽  
M.S. Smirnov ◽  
O.V. Ovchinnikov ◽  
I.G. Grevtseva ◽  
A.N. Latyshev
Keyword(s):  
Quantum Dots ◽  
Indocyanine Green ◽  
Biological Tissue ◽  
Thioglycolic Acid ◽  
Therapeutic Window ◽  
Polymethine Chain ◽  
Coordination Interaction ◽  
Ag2s Quantum Dots ◽  
Average Size ◽  
Monomer Band

In this work, manifestations of IR luminescence sensitization of Indocyanine Green during conjugation with colloidal Ag2S quantum dots with average size of 2.2 and 3.7 nm, passivated with thioglycolic acid molecules (Ag2S/TGA QDs) are studied using absorption and luminescence techniques. The possibility of enhancing luminescence in the dye monomer band (820 nm) under excitation of 660 nm by a factor of 6 in the presence of Ag2S/TGA QDs (2.2 nm) due to a decrease in the dye polymethine chain due movement via coordination interaction with quantum dots was demonstrated. The way to switch-over from the first therapeutic window of biological tissue transparency (NIR-I, 700-950 nm) to the second (NIR-II, 1000-1700 nm), based on sensitization of IR luminescence of Ag2S/TGA QDs with an average size of 3.7 nm in the region of 1040 nm due to of resonance non-radiative transfer of excitation energy from Ag2S/TGA (2.2 nm) QDs at 900 nm to Ag2S/TGA QDs (3.7 nm) via the J-aggregate of ICG dye, which acts as an exciton bridge.

scholarly journals High temperature synthesis and characterization of ultrathin tellurium nanostructures

APL Materials ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 081103 ◽  
Author(s):  
Keshab R. Sapkota ◽  
Ping Lu ◽  
Douglas L. Medlin ◽  
George T. Wang
Keyword(s):  
High Temperature ◽  
Synthesis And Characterization ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Low-temperature synthesis and characterization of ZnO quantum dots

2008 ◽  
Vol 463 (1-2) ◽  
pp. 92-95 ◽  
Author(s):  
Lili Yang ◽  
Jinghai Yang ◽  
Xiaoyan Liu ◽  
Yongjun Zhang ◽  
Yaxin Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Low Temperature ◽  
Synthesis And Characterization ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Zno Quantum Dots

A Microfabricated Gas-Liquid Segmented Flow Reactor for High-Temperature Synthesis: The Case of CdSe Quantum Dots

2005 ◽  
Vol 44 (34) ◽  
pp. 5447-5451 ◽  
Author(s):  
Brian K. H. Yen ◽  
Axel Günther ◽  
Martin A. Schmidt ◽  
Klavs F. Jensen ◽  
Moungi G. Bawendi
Keyword(s):  
Quantum Dots ◽  
High Temperature ◽  
Flow Reactor ◽  
Cdse Quantum Dots ◽  
Segmented Flow ◽  
Temperature Synthesis ◽  
High Temperature Synthesis
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