Two-Phase Approach to High-Quality, Oil-Soluble, Near-Infrared-Emitting PbS Quantum Dots by Using Various Water-Soluble Anion Precursors

2011 ◽  
Vol 2011 (15) ◽  
pp. 2422-2432 ◽  
Author(s):  
Dawei Deng ◽  
Jie Cao ◽  
Junfei Xia ◽  
Zhiyu Qian ◽  
Yueqing Gu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Water Soluble ◽  
High Quality ◽  
Two Phase ◽  
Phase Approach ◽  
Pbs Quantum Dots

Facile Synthesis of High-Quality, Water-Soluble, Near-Infrared-Emitting PbS Quantum Dots

2009 ◽  
Vol 2009 (23) ◽  
pp. 3440-3446 ◽  
Author(s):  
Dawei Deng ◽  
Wenhao Zhang ◽  
Xinyang Chen ◽  
Fei Liu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Water Soluble ◽  
Facile Synthesis ◽  
High Quality ◽  
Quality Water ◽  
Pbs Quantum Dots

Comparison of the Luminescence Properties of PbS Quantum Dots Prepared by Different Methods

2013 ◽  
Vol 745-746 ◽  
pp. 616-620
Author(s):  
Xiang Wen Yu ◽  
Ming Hui Wang ◽  
Lian Jun Wang ◽  
Wan Jiang
Keyword(s):  
Quantum Dots ◽  
Luminescent Properties ◽  
Xrd Analysis ◽  
Water Soluble ◽  
Cubic Phase ◽  
Two Phase ◽  
Phase Approach ◽  
Aqueous Method ◽  
Biological Labeling ◽  
Pbs Quantum Dots

PbS quantum dots (QDs) were prepared through a two-phase approach and an aqueous method respectively. The reaction conditions of the two-phase approach were mild and highly controllable, but the as-prepared QDs were capped with oleic acid. Although the PbS QDs prepared by the aqueous method did not exhibit excellent photoluminescence properties, it was more facile and environmentally friendly, and furthermore the resulting PbS QDs were more promising in biological labeling without ligand exchange. We have investigated the absorption and luminescent properties of QDs prepared by the two methods. The results showed that the absorption shoulder of oil soluble PbS QDs was at 580nm and water soluble PbS QDs was at 600~700nm. And the emission peaks in the photoluminescence spectra were at 755nm and 970nm, respectively. XRD analysis confirmed that the PbS QDs were cubic phase. The TEM results showed that the size of both types of PbS QDs was smaller than the excitons Bohr radius (18nm).

Two-phase approach synthesis of high photoluminescence PbS quantum dots

2014 ◽  
Vol 131 ◽  
pp. 35-37
Author(s):  
Fengjiu Yang ◽  
Beiying Zhou ◽  
Xin Zhang ◽  
Lianjun Wang ◽  
Wan Jiang
Keyword(s):  
Quantum Dots ◽  
Two Phase ◽  
Phase Approach ◽  
Pbs Quantum Dots

Size Tunable near Infrared High-Quality PbS Quantum Dots

2014 ◽  
Vol 490-491 ◽  
pp. 319-323 ◽  
Author(s):  
M.N. Kalasad ◽  
M.K. Rabinal ◽  
B.G. Mulimani ◽  
N.C. Greenham
Keyword(s):  
Quantum Dots ◽  
Present Method ◽  
Near Infrared ◽  
Low Cost ◽  
Electronic Devices ◽  
High Quality ◽  
Band Emission ◽  
Transmission Electron ◽  
Pbs Quantum Dots ◽  
Time Of Reaction

Herein, we report the synthesis of PbS Quantum Dots (QDs) with oleic acid as surfactant molecules by non coordinating solvent route. The particles are having better size tunability by varying temperature and time of reaction. These quantum dots are characterized by optical absorption, photoluminescence and transmission electron microscopy. The resulting colloids are highly stable, extremely small size, spherical in shape, monodisperse and strong band emission. The estimated particles sizes are in the range of 2 to 6 nm. The present method of synthesis of PbS quantum dots can be used to fabricate low cost electronic devices.

High-Quality and Water-Soluble Near-Infrared Photoluminescent CdHgTe/CdS Quantum Dots Prepared by Adjusting Size and Composition

2007 ◽  
Vol 111 (45) ◽  
pp. 16852-16857 ◽  
Author(s):  
Huifeng Qian ◽  
Chaoqing Dong ◽  
Jinliang Peng ◽  
Xin Qiu ◽  
Yuhong Xu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Water Soluble ◽  
Cds Quantum Dots ◽  
High Quality

Two-step synthesis of high-quality water-soluble near-infrared emitting quantum dots via amphiphilic polymers

2010 ◽  
Vol 46 (29) ◽  
pp. 5301 ◽  
Author(s):  
Haiguang Zhao ◽  
Defa Wang ◽  
Teng Zhang ◽  
Mohamed Chaker ◽  
Dongling Ma
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Amphiphilic Polymers ◽  
Water Soluble ◽  
High Quality ◽  
Quality Water

The photoluminescence spectral profiles of water-soluble aggregates of PbS quantum dots assembled through reversible metal coordination

2017 ◽  
Vol 53 (12) ◽  
pp. 1981-1984 ◽  
Author(s):  
Chen Wang ◽  
Mohamad Saeed Kodaimati ◽  
George C. Schatz ◽  
Emily A. Weiss
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Near Infrared ◽  
Water Soluble ◽  
Metal Coordination ◽  
Spectral Profiles ◽  
Soluble Aggregates ◽  
Pbs Quantum Dots

PbS quantum dots coupled by glutathione–Zn2+ complexes act as their own aggregation sensors by mediating multi-step near-infrared energy transfer.

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