scholarly journals Aqueous Synthesis of CdTe Quantum Dot Using Dithiol-Functionalized Ionic Liquid

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Suk Young Choi ◽  
Jong Pil Shim ◽  
Dong Sun Kim ◽  
TaeYoung Kim ◽  
Kwang S. Suh
Keyword(s):  
Ionic Liquid ◽  
Quantum Dot ◽  
Water Soluble ◽  
Ligand Molecule ◽  
Synthetic Route ◽  
Aqueous Synthesis ◽  
Cdte Nanocrystals ◽  
Photoluminescence Quantum Yield ◽  
Improved Stability ◽  
Cdte Quantum Dot

We report on an aqueous synthesis of cadmium telluride (CdTe) nanocrystals by using dithiol-functionalized ionic liquids (dTFILs). The dTFILs were designed to have dithiol and vinylimidazolium functional groups and used as a ligand molecule of CdTe quantum dot (QD) to utilize the bidendate chelate interaction afforded by the dithiol groups of dTFILs. The photoluminescence quantum yield of dTFIL-capped CdTe QDs reached up to ~40%, and their luminescent property was maintained for 8 weeks, suggesting an improved stability in water phase. This approach will provide a new synthetic route to the water soluble QDs.

One-step aqueous synthesis of graphene–CdTe quantum dot-composed nanosheet and its enhanced photoresponses

2011 ◽  
Vol 353 (2) ◽  
pp. 588-592 ◽  
Author(s):  
Zhisong Lu ◽  
Chun Xian Guo ◽  
Hong Bin Yang ◽  
Yan Qiao ◽  
Jun Guo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Aqueous Synthesis ◽  
One Step ◽  
Cdte Quantum Dot

Synthesis of CdTe Nanocrystals with Mercaptosuccinic Acid as Stabilizer

2008 ◽  
Vol 8 (9) ◽  
pp. 4408-4414 ◽  
Author(s):  
Chao Wang ◽  
Qiang Ma ◽  
Xingguang Su
Keyword(s):  
Hydrothermal Synthesis ◽  
Quantum Yield ◽  
Growth Process ◽  
Thioglycolic Acid ◽  
Water Soluble ◽  
Narrow Size Distribution ◽  
High Quality ◽  
Cdte Nanocrystals ◽  
Mercaptosuccinic Acid ◽  
Photoluminescence Quantum Yield

Water soluble high quality CdTe nanocrystals (NCs) with mercaptosuccinic acid (MSA) as stabilizer are prepared by refluxing and hydrothermal synthesis in this paper. The MSA stabilizer which comprises both thioglycolic acid (TGA)-like and 3-mercaptopropionic acid (MPA)-like moieties can accelerate the whole growth process of CdTe NCs comparing with TGA-like or MPA-like stabilizer. It takes only 5 min and 2 hours to obtain green emitting (luminescence maximum at 526 nm) and red emitting (luminescence maximum at ∼650 nm) from CdTe NCs, respectively. In this study, the influences of the ratios of precursors and temperature on CdTe NCs synthesis were studied in detail, and the stable CdTe NCs with high photoluminescence quantum yield and narrow size distribution can be obtained under optimal condition by both routes. The luminescence quantum yield of the green-yellow emitting CdTe NCs obtained in this study can reach 75.2%.

A p-Type PbS Quantum Dot Ink with Improved Stability for Solution Processable Optoelectronics

2021 ◽  
Author(s):  
Fiaz Ahmed ◽  
John Hardin Dunlap ◽  
Perry J. Pellechia ◽  
Andrew Greytak
Keyword(s):  
Quantum Dot ◽  
Ligand Exchange ◽  
Chemical Characterization ◽  
Single Step ◽  
Improved Stability ◽  
Solution Processable ◽  
P Type ◽  
Pbs Quantum Dot

A highly stable p-type PbS-QDs ink is prepared using a single-step biphasic ligand exchange route, overcoming instability encountered in previous reports. Chemical characterization of the ink reveals 3-mercaptopriopionic acid (MPA)...

Near-Unity Photoluminescence Quantum Yield and Highly Suppressed Blinking in a Toxic-Metal-Free Quantum Dot

2021 ◽  
Vol 12 (5) ◽  
pp. 1426-1431
Author(s):  
Swarnali Ghosh ◽  
Saptarshi Mandal ◽  
Soumen Mukherjee ◽  
Chayan K. De ◽  
Tridib Samanta ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Quantum Dot ◽  
Toxic Metal ◽  
Metal Free ◽  
Photoluminescence Quantum Yield

Electrochemical Determination of Uric Acid at CdTe Quantum Dot Modified Glassy Carbon Electrodes

2015 ◽  
Vol 98 (5) ◽  
pp. 1260-1266 ◽  
Author(s):  
Deng Pan ◽  
Shengzhong Rong ◽  
Guangteng Zhang ◽  
Yannan Zhang ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
Uric Acid ◽  
Quantum Dot ◽  
Glassy Carbon ◽  
Semiconductor Nanocrystals ◽  
Phosphate Buffer Solution ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Buffer Solution ◽  
Peak Current ◽  
Cdte Quantum Dot

Abstract Cyclic voltammetry and differential pulse voltammetry were used to investigate the electrochemical behavior of uric acid (UA) at a CdTe quantum dot (QD) modified the glassy carbon electrode (GCE). CdTe QDs, as new semiconductor nanocrystals, can greatly improve the peak current of UA. The anodic peak current of UA was linear with its concentration between 1.0 × 10–6 and 4.0 × 10–4 M in 0.1 M pH 5.0 phosphate buffer solution. The LOD for UA at the CdTe electrode (1.0 × 10–7 M) was superior to that of the GCE. In addition, we also determined the effects of scan rate, pH, and interferences of UA for the voltammetric behavior and detection. The results indicated that modified electrode possessed excellent reproducibility and stability. Finally, a new and efficient electrochemical sensor for detecting UA was developed.

scholarly journals Energy transfer in colloidal CdTe quantum dot nanoclusters

2010 ◽  
Vol 18 (24) ◽  
pp. 24486 ◽  
Author(s):  
Clare Higgins ◽  
Manuela Lunz ◽  
A. Louise Bradley ◽  
Valerie A. Gerard ◽  
Stephen Byrne ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Quantum Dot ◽  
Cdte Quantum Dot
Sign in / Sign up

Export Citation Format

Share Document