Direct Visualization of Ligands Exchange on the Surfaces of Quantum Dots by a Two-Phase Approach

2018 ◽  
Vol 3 (8) ◽  
pp. 2267-2271
Author(s):  
Xiaobo Nie ◽  
Ying Zhang ◽  
Xiaojuan Wang ◽  
Chunguang Ren ◽  
Shu-Qin Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Direct Visualization ◽  
Two Phase ◽  
Phase Approach ◽  
Ligands Exchange

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

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

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).

A two-phase approach for mining weighted partial periodic patterns

2014 ◽  
Vol 30 ◽  
pp. 225-234 ◽  
Author(s):  
Kung-Jiuan Yang ◽  
Tzung-Pei Hong ◽  
Guo-Cheng Lan ◽  
Yuh-Min Chen
Keyword(s):  
Periodic Patterns ◽  
Two Phase ◽  
Phase Approach
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