Water-soluble, luminescent ZnTe quantum dots: supersaturation-controlled synthesis and self-assembly into nanoballs, nanonecklaces and nanowires

2016 ◽  
Vol 45 (9) ◽  
pp. 3918-3926 ◽  
Author(s):  
Sovan Kumar Patra ◽  
Bhavya Bhushan ◽  
Amiya Priyam
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Blue Shift ◽  
Water Soluble ◽  
Red Shift ◽  
Controlled Synthesis ◽  
High Quality ◽  
Pl Spectra

A supersaturation-controlled aqueous approach was used to obtain high-quality ZnTe QDs. These QDs underwent isotropic self-assembly to form nanoballs and nanonecklaces with a blue shift and anisotropic self-assembly to form nanowires with a red shift in the PL spectra.

Green and facile synthesis of high-quality water-soluble Ag-In-S/ZnS core/shell quantum dots with obvious bandgap and sub-bandgap excitations

2018 ◽  
Vol 753 ◽  
pp. 364-370 ◽  
Author(s):  
Yanyan Chen ◽  
Qiang Wang ◽  
Tianyong Zha ◽  
Jigang Min ◽  
Jingying Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Soluble ◽  
Core Shell ◽  
Facile Synthesis ◽  
High Quality ◽  
Quality Water

Effects of Cu Dopant on Lattice and Optical Properties of ZnS Quantum Dots

2016 ◽  
Vol 16 (4) ◽  
pp. 3816-3820
Author(s):  
Lu Shuhua ◽  
Wang Aiji ◽  
Chen Tingfang ◽  
Wang Yinshu
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Dot ◽  
Blue Shift ◽  
Red Shift ◽  
Colloidal Nanocrystals ◽  
Long Tail ◽  
Low Concentrations ◽  
Cu Dopant ◽  
Cu Ions

Doped and undoped ZnS colloidal nanocrystals have drawn much attention due to their versatile applications in the fields of optoelectronics and biotechnology. In this paper, Cu doped ZnS quantum dots were synthesized via the simple thermolysis of ethylxanthate salts. The lattice and optical properties of the nanocrystals were then studied in detail. The quantum dot lattice contracted linearly between Cu concentrations of 0.2–2%, while it continued to contract more gradually as Cu concentrations were further increased from 4 to 6%, due in part to the Cu ions located on the surface of the ZnS lattice. Cu incorporation induces a long tail in absorption at long wavelengths. The PL spectrum shows a red shift at first, and then a blue shift with increases in Cu concentration. Cu doped at low concentrations (0.2–1%) enhanced the emission, while high Cu concentrations (2–6%) quenched emissions.

Optimized Synthesis of Water-Soluble and Small-Size CdSe Quantum Dots

2011 ◽  
Vol 266 ◽  
pp. 46-50
Author(s):  
Jiao Yun Xia ◽  
Jun Long Tang
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Water Soluble ◽  
Cdse Quantum Dots ◽  
Key Factors ◽  
Cdse Qds ◽  
High Quality ◽  
Synthesis Route ◽  
Initial Ph

An optimized synthesis route was applied for controlling the preparation of CdSe quantum dots (QDs) in an aqueous solution. Some key factors which influencing the properties of CdSe QDs, such as initial pH, ratio of precursor etc, were investigated. The as-prepared products have been characterized by TEM, XPS, XRD, UV-Vis and fluorescence (FL) spectra. The result showed that the high-quality CdSe QDs with 3 nm was obtained. The experiments also conformed that the CdSe QDs with better FL properties were obtained with properly initial pH, 5, suitably [Cd2+] / [SeSO3 2-], range from 1:0.25 to 1:0.75 and the ratio of [Cd2+] / [TGA] is 1:2~1:3.

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

The preparation of high-quality water-soluble silicon quantum dots and their application in the detection of formaldehyde

RSC Advances ◽  
2016 ◽  
Vol 6 (101) ◽  
pp. 98899-98907 ◽  
Author(s):  
Xiaoling Xu ◽  
Shiyao Ma ◽  
Xincai Xiao ◽  
Yan Hu ◽  
Dan Zhao
Keyword(s):  
Quantum Dots ◽  
Sodium Citrate ◽  
Water Soluble ◽  
Hydrothermal Route ◽  
High Quality ◽  
Silicon Quantum Dots ◽  
Quality Water ◽  
Soluble Silicon

This paper reports the synthesis of water-soluble fluorescence silicon quantum dots (Si QDs) through a hydrothermal route with urea propyl triethoxysilane (UPTES) as the source of silicon and sodium citrate as the deoxidizer.

Biomanufacturing of CdS quantum dots

2015 ◽  
Vol 17 (7) ◽  
pp. 3775-3782 ◽  
Author(s):  
Zhou Yang ◽  
Li Lu ◽  
Victoria F. Berard ◽  
Qian He ◽  
Christopher J. Kiely ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Stenotrophomonas Maltophilia ◽  
Water Soluble ◽  
Controlled Synthesis ◽  
Cds Quantum Dots ◽  
Size Controlled

A strain ofStenotrophomonas maltophiliais engineered to achieve size controlled synthesis of water soluble CdS quantum dots.

Direct Synthesis of High-Quality Water-Soluble CdTe:Zn2+Quantum Dots

2012 ◽  
Vol 51 (17) ◽  
pp. 9208-9213 ◽  
Author(s):  
Qisui Wang ◽  
Tingting Fang ◽  
Peng Liu ◽  
Bohua Deng ◽  
Xinmin Min ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Direct Synthesis ◽  
Water Soluble ◽  
High Quality ◽  
Quality Water

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
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