Highly concentrated MoS2 nanosheets in water achieved by thioglycolic acid as stabilizer and used as biomarkers

RSC Advances ◽  
2014 ◽  
Vol 4 (81) ◽  
pp. 42936-42941 ◽  
Author(s):  
Rajeshkumar Anbazhagan ◽  
Hsing-Ju Wang ◽  
Hsieh-Chih Tsai ◽  
Ru-Jong Jeng
Keyword(s):  
Quantum Dots ◽  
Carboxylic Acid ◽  
Thioglycolic Acid ◽  
Hydrophobic Surface ◽  
Water Soluble ◽  
Mos2 Nanosheets ◽  
Carboxylic Acid Groups ◽  
Monolayer Nanosheets

Synthesis of water soluble MoS2 quantum dots from the monolayer nanosheets of MoS2, using thioglycolic acid (TGA) was reported in this study. TGA molecules not only exfoliated the bulk of MoS2, but also modified the hydrophobic surface of MoS2 with hydrophilic carboxylic acid groups.

Metal ion interaction of water-soluble copolymers containing carboxylic acid groups in aqueous phase by membrane filtration technique

2007 ◽  
Vol 105 (5) ◽  
pp. 2893-2902 ◽  
Author(s):  
Guadalupe Del C. Pizarro ◽  
Oscar G. Marambio ◽  
Manuel Jeria-Orell ◽  
Margarita R. Huerta ◽  
Oscar O. Rodríguez ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Aqueous Phase ◽  
Metal Ion ◽  
Membrane Filtration ◽  
Water Soluble ◽  
Carboxylic Acid Groups ◽  
Filtration Technique

SYNTHESIS AND PHOTOLUMINESCENCE OF WATER-SOLUBLE ZnS:Mn2+/ZnS QUANTUM DOTS BY NUCLEATION DOPING STRATEGY

NANO ◽  
2011 ◽  
Vol 06 (01) ◽  
pp. 75-79 ◽  
Author(s):  
ZHANGSEN YU ◽  
XIYING MA
Keyword(s):  
Quantum Dots ◽  
Solution Structure ◽  
Thioglycolic Acid ◽  
Luminescent Properties ◽  
Fluorescent Labeling ◽  
Water Soluble ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Conditions

We report the synthesis of luminescent-doped core/shell quantum dots (QDs) of water-soluble manganese-doped zinc sulfide (ZnS:Mn2+/ZnS) . QDs of ZnS:Mn2+/ZnS were prepared by nucleation doping strategy, with thioglycolic acid (TGA) as stabilizer in aqueous solution. Structure and optical properties of the ZnS:Mn2+/ZnS core/shell quantum dots were characterized by X-ray diffraction and photoluminescence emission spectroscopy. The influence of the synthesis conditions on the luminescent properties of ZnS:Mn2+/ZnS QDs is discussed. Different Mn2+ concentrations, ratios of the TGA/ (Zn+Mn) and thickness of the ZnS shell were used. Results showed that the ZnS:Mn2+/ZnS QDs are water-soluble and have improved fluorescence properties. Therefore, Mn2+ -doped ZnS quantum dots could be potential candidates as fluorescent labeling agents in biology.

Synthesis of CdTe and CdTe/CdS Core-Shell Quantum Dots and their Optical Properties

2011 ◽  
Vol 306-307 ◽  
pp. 1350-1353 ◽  
Author(s):  
Juan Juan Lu ◽  
Shen Guang Ge ◽  
Fu Wei Wan ◽  
Jing Hua Yu
Keyword(s):  
Quantum Dots ◽  
Thioglycolic Acid ◽  
Water Soluble ◽  
Molar Ratio ◽  
Core Shell ◽  
The Core ◽  
Cdte Qds ◽  
Quality Water ◽  
Synthesis Procedure ◽  
Pl Emission

This paper describes the synthesis of CdTe and CdTe/CdS core-shell quantum dots (QDs) in aqueous solution. The quantum dots are prepared by using thioglycolic acid (TGA) as stabilizers. The synthesis procedure is simple and controllable. Different sized CdTe QDs with tuned PL wavelengths from 550 to 640 nm was synthesized by controlling reaction time within 5 h in aqueous solutions at a temperature of 100 °C. We also investigated the influence of precursor Cd/Te molar ratio for the prepared QDs. It was showed that the core-shell CdTe/CdS QDs have larger photoluminescence (PL) emission intensity than the original CdTe QDs. The synthesized core-shell CdTe/ZnS QDs have high quality, water-soluble and will be useful in applications of biolabeling, biosensing, and imaging.

Research Based on Dependencies of Luminescent Properties of CdTe Quantum Dots with TGA as Surfactant

2013 ◽  
Vol 740 ◽  
pp. 715-720
Author(s):  
Jigang Wang ◽  
Yong Sheng Wang ◽  
Da Wei He ◽  
Shu Lei Li ◽  
Jia Qi He ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Reaction Time ◽  
Thioglycolic Acid ◽  
Luminescent Properties ◽  
Optical Characterization ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
Secondary Effects ◽  
Stabilizing Agents

We investigated the optical characterization of luminescent thioglycolic acid (TGA) stabilized CdTe quantum dots (CdTe-QD) synthesized in water. The influence of stabilizing agents on the luminescent properties of water-soluble CdTe quantum dots (QDs) was described. It is found that QDs can be synthesized easily when TGA is chosen as stabilizing agent and TGA leads to preparation of highly luminescent QDs due to the secondary effects of bonds between Cd2+ and sulfhydryl groups. The absorption wavelength and PL stability of TGA-CdTe are also characterized. Size can be controlled between 2.0 nm to 4.0 nm. The TGA-CdTe QDs prepared at 2 h reaction time possess excellent luminescent properties.

Investigations on the interaction of water-soluble semiconductor polymer with thioglycolic acid (TGA) capped CdTe quantum dots

2019 ◽  
Vol 93 ◽  
pp. 70-75
Author(s):  
Milton Lopes de Lana Junior ◽  
Thamiris Ranquine Cardoso ◽  
Paula D.C. Souza ◽  
Virgílio de Carvalho dos Anjos ◽  
Maria José V. Bell ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Thioglycolic Acid ◽  
Water Soluble ◽  
Cdte Quantum Dots

A quantum dot-based fluorescence sensor for sensitive and enzymeless detection of creatinine

2016 ◽  
Vol 8 (30) ◽  
pp. 5911-5920 ◽  
Author(s):  
Narjes Tajarrod ◽  
Mohammad Kazem Rofouei ◽  
Majid Masteri-Farahani ◽  
Reza Zadmard
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Fluorescence Enhancement ◽  
Thioglycolic Acid ◽  
Fluorescence Sensor ◽  
Water Soluble ◽  
Core Shell

A schematic illustration of a sensitive creatinine probe using fluorescence enhancement of water-soluble thioglycolic acid capped ZnS:Mn/ZnS core/shell quantum dots.

Monodisperse and Water-Soluble Quantum Dots for SWIR Imaging via Carboxylic Acid Copolymer Ligands

2020 ◽  
Vol 12 (32) ◽  
pp. 35845-35855
Author(s):  
Daniel M. Montana ◽  
Michel Nasilowski ◽  
Whitney R. Hess ◽  
Mari Saif ◽  
Jessica A. Carr ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carboxylic Acid ◽  
Water Soluble ◽  
Acid Copolymer
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