CdTe Nanocrystals Capped with a Tetrazolyl Analogue of Thioglycolic Acid: Aqueous Synthesis, Characterization, and Metal-Assisted Assembly

ACS Nano ◽  
2010 ◽  
Vol 4 (7) ◽  
pp. 4090-4096 ◽  
Author(s):  
Vladimir Lesnyak ◽  
Sergei V. Voitekhovich ◽  
Pavel N. Gaponik ◽  
Nikolai Gaponik ◽  
Alexander Eychmüller
Keyword(s):  
Thioglycolic Acid ◽  
Aqueous Synthesis ◽  
Cdte Nanocrystals

scholarly journals OPTICAL AND ELECTROCHEMICAL PROPIERTIES IN CdSe/CdTe AND CdSe/CdTe NANOCRYSTALS PREPARED BY AQUEOUS SYNTHESIS

2020 ◽  
pp. 160-169
Author(s):  
Raul Fernando Cuevas Rojas ◽  
Miguel Angel González Balanta ◽  
Silvio José Prado ◽  
Pablo Henrique Menezes ◽  
Lauro Antonio Pradela Filho ◽  
...  
Keyword(s):  
Aqueous Synthesis ◽  
Cdte Nanocrystals

Aqueous Synthesis of MPA-Capped CdTe Nanocrystals Emitted in Near Infrared with High Quantum Yield

2014 ◽  
Vol 14 (7) ◽  
pp. 5238-5243 ◽  
Author(s):  
Yongqiang Cao ◽  
Ning Liu ◽  
Ping Yang ◽  
Yuanna Zhu ◽  
Ruixia Shi ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Near Infrared ◽  
High Quantum Yield ◽  
Aqueous Synthesis ◽  
High Quantum ◽  
Cdte Nanocrystals

Synthesis of Highly Photoluminescent CdTe Nanocrystals and Their Incorporation into Glass Matrices

2004 ◽  
Vol 829 ◽  
Author(s):  
Norio Murase ◽  
Chunliang Li
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Thioglycolic Acid ◽  
Sol Gel ◽  
Molar Ratio ◽  
Amino Group ◽  
Cdte Nanocrystals ◽  
Silane Coupling ◽  
Glass Matrices ◽  
Luminescent Nanocrystals

ABSTRACTPhotoluminescence (PL) efficiency of thioglycolic-acid (TGA)-stabilized CdTe nanocrystals in water depends strongly on the amount of TGA upon synthesis. The less the amount, the higher the PL efficiency obtained if the colloid is not precipitated. When the molar ratio of TGA against Cd2+ upon preparation is ca. 1.3, PL efficiency of as-prepared solution becomes the maximum and exceeds 60% in red-emitting region. In this case, the spectral widths of the PL become the minimum. We have encapsulated these highly luminescent nanocrystals into glass matrices by using a sol-gel method. Silane coupling agent having an amino-group is effective to preserve the surface of the nanocrystals. The glass thus prepared is stable and shows PL efficiency as high as 40%.

Kinetic Growth of One-Dimensional Zinc-Blende CdTe Nanocrystals by Aqueous Synthesis at Low Temperature

2009 ◽  
Vol 9 (12) ◽  
pp. 5077-5082 ◽  
Author(s):  
Tao Wang ◽  
Zhengguo Jin ◽  
Yamin Shi ◽  
Wenle Li ◽  
Jingxia Yang
Keyword(s):  
Low Temperature ◽  
Aqueous Synthesis ◽  
One Dimensional ◽  
Cdte Nanocrystals ◽  
Kinetic Growth ◽  
Zinc Blende

Preparation and Photoluminescence of Hybrid SiO2-Coated CdTe Nanocrystals

2011 ◽  
Vol 306-307 ◽  
pp. 1194-1197 ◽  
Author(s):  
Ning Liu ◽  
Zhi Min Yuan ◽  
Jie Yang ◽  
Yu Lan Zhang ◽  
Rui Li Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Thioglycolic Acid ◽  
Sol Gel ◽  
Tetraethyl Orthosilicate ◽  
Important Application ◽  
Average Lifetime ◽  
Peak Wavelength ◽  
Cdte Nanocrystals ◽  
Biological Technique ◽  
Cdte Core

Novel hybrid SiO2-coated CdTe core-shell nanocrystals (NCs) were fabricated by re-dispersing green-emitting CdTe NCs in a solution of Cd2+ions, thioglycolic acid (TGA), tetraethyl orthosilicate and ammonia with a sol-gel reaction at room temperature and a further reflux procedure. The hybrid NCs consisted of a CdTe core and a hybrid SiO2shell with CdS-like clusters. The clusters created by the reaction of Cd2+and S2-generated by the decomposition of TGA during reflux. The hybrid NCs exhibited tunable photoluminescence (PL) color from green to red and high PL quantum yield (PLQY). The CdS-like clusters play an important role for the hybrid NCs with numerous PL properties. Compared with initial CdTe NCs, the PLQY of the hybrid NCs increased from 18% to 47% together with a red-shifted PL peak wavelength of 61 nm. The average lifetime of the hybrid NCs (39 ns) is longer than that of initial CdTe NCs (25 ns). The high PLQY and the hybrid shell make CdTe NCs an important application for biological technique.

Theoretical simulation of CdTe nanocrystals in aqueous synthesis

2010 ◽  
Vol 21 (3) ◽  
pp. 519-525 ◽  
Author(s):  
Shuhong Xu ◽  
Chunlei Wang ◽  
Yiping Cui
Keyword(s):  
Aqueous Synthesis ◽  
Theoretical Simulation ◽  
Cdte Nanocrystals

scholarly journals Synthesis and characterization of oleic acid stabilized CdTe quantum dots and their properties as luminescence quencher of a pyridine pendented rod-coil homopolymer

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Manpreet Kaur ◽  
Duryodhan Sahu
Keyword(s):  
Quantum Dots ◽  
Oleic Acid ◽  
Surface Passivation ◽  
Average Diameter ◽  
Cdte Quantum Dots ◽  
Aqueous Synthesis ◽  
Quenching Effect ◽  
Pl Spectra ◽  
Cdte Nanocrystals ◽  
Transmission Electron

AbstractWe report a facile one-step non aqueous synthesis of oleic acid stabilized cadmium telluride (CdTe) quantum dots (QDs) with an average diameter of 3 nm to 4 nm by hot injection method. The synthesized oleic acid capped QDs observed by TEM were nearly spherical. The optical properties of QDs were characterized by UV-Vis absorption spectra and photoluminescence (PL) spectra. The structures of QDs and their surface passivation were further verified using transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The quenching effect of the CdTe QD was explored by addition of CdTe nanocrystals into a solution of rod-coil homopolymer (poly[10-(6-(9,9-diethyl-7-(pyridin-4-yl)-9H-fluoren-2-yl)naphthalen-2-yloxy) decyl methacrylate]) (PFNA) having pendent pyridine. The gradual addition of quantum dots to the solution of PFNA quenched the PL spectra of PFNA. This may be used to explore the coordination ability of pyridine containing homopolymer with CdTe quantum dots.

Aqueous synthesis of CdTe nanocrystals: progresses and perspectives

2011 ◽  
Vol 47 (33) ◽  
pp. 9293 ◽  
Author(s):  
Yilin Li ◽  
Lihong Jing ◽  
Ruirui Qiao ◽  
Mingyuan Gao
Keyword(s):  
Aqueous Synthesis ◽  
Cdte Nanocrystals
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