Related Experiment Video
Updated: May 4, 2026
Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
Controllable blinking-to-nonblinking behavior of aqueous CdTeS Alloyed quantum dots
Chaoqing Dong1, Heng Liu, Aidi Zhang
1School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China), Fax: (+86) 21-5474-1297. cqdong@sjtu.edu.cn.
Researchers controlled the blinking of semiconductor quantum dots (QDs) using thiol ligands. This breakthrough enables nonblinking QDs with high quantum yield for advanced applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Semiconductor quantum dots (QDs) are crucial optical nanomaterials.
- Single-dot emission applications are hindered by QD blinking.
Purpose of the Study:
- Investigate synthetic conditions affecting aqueous CdTeS alloyed QDs blinking.
- Control QD blinking using surface ligand structure and concentration.
Main Methods:
- Systematic investigation of synthetic conditions.
- Utilized thiol compounds as surface ligands.
- Prepared aqueous CdTeS alloyed QDs.
Main Results:
- QD blinking behavior is controllable via thiol ligand structure and concentration.
- Achieved completely nonblinking QDs under optimal conditions.
- Suppressed blinking attributed to surface trap elimination, CdS coating, and controlled growth dynamics.
Conclusions:
- Nonblinking QDs exhibit high quantum yield, small size, and good solubility.
- Developed nonblinking QDs overcome limitations in biological and photoelectric applications.
- Thiol ligands are effective stabilizers for achieving nonblinking aqueous QDs.
More Related Videos
10:41Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
Published on: May 31, 2018
10:56Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications
Published on: February 6, 2016