Journal article
Highly Photoluminescent and Stable Aqueous ZnS Quantum Dots
Industrial & engineering chemistry research, v 49(2), pp 579-582
2010
PMID: 21954321
Abstract
We report an all-aqueous synthesis of highly photoluminescent and stable ZnS quantum dots (QDs) with water as the medium, i.e. first synthesizing ZnS QDs with 3-mercaptopropionic acid (MPA) as the capping molecule, followed by replacing some of MPA with (3-mercaptopropyl) trimethoxysilane (MPS). The resultant MPS-replaced ZnS QDs were about 5 nm in size with a cubic zinc blende crystalline structure, and had both MPA and MPS on the surface as confirmed by the Fourier Transform Infrared (FTIR) spectroscopy. They exhibited blue trap-state emissions around 415 nm and a quantum yield (QY) of 75% with Rhodamine 101 as the reference, and remained stable for more than 60 days under the ambient conditions. Through the capping molecule replacement procedure, the MPS-replaced ZnS QDs avoided the shortcomings of both the MPA-ZnS QDs and the MPS-ZnS QDs, and acquired the advantages of strong photoluminescence and good stability, which are important to the QDs’ applications especially for bioimaging.
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Details
- Title
- Highly Photoluminescent and Stable Aqueous ZnS Quantum Dots
- Creators
- Hui Li - Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAWan Y Shih - School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, PA 19104, USAWei-Heng Shih - Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Industrial & engineering chemistry research, v 49(2), pp 579-582
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems; Materials Science and Engineering
- Web of Science ID
- WOS:000273404300019
- Scopus ID
- 2-s2.0-75249106096
- Other Identifier
- 991014878014004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Chemical