Formation of Water Soluble Wavelength Tunable InGaP and InP Quantum Dots


Quantum dots (Q-dots) have recently attracted interest for biological applications as efficient biomarkers. Operational wavelength and water solubility are core considerations in terms of the applicable to Q-dots in biology. However, operating wavelength control and PL loss during water solubilization are major drawbacks. Herein, high quality, wavelength tuneable, and water soluble InGaP and InP were prepared using a simple thermal synthesis. The results obtained showed that the decrease in quantum yield previously observed in lipidized quantum dots loss was greatly diminished using this approach, which resulted in excellent control of emission wavelength and enhanced PL intensity. Q-dot sizes were controlled using a two-step etching process that enabled size control, significantly improved PL intensities, and minimized the loss in PL intensity associated with lipidization.




The Authors wish to acknowledge the Materials Research Center at the Missouri University of Science and Technology and the Department of Chemistry at the Missouri University of Science and Technology. This research was supported by Korea Ministry of Environment as The Converging Technology Program (ARQ201403075001) and by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through Advanced Production Technology Development Program, funded by Ministry of Agriculture, Food, and Rural Affairs (MAFRA) (314033-02).

Keywords and Phrases

Nanocrystals; Solubility, Biological applications; Emission wavelength; Operating wavelength; Thermal synthesis; Water solubilities; Water solubilization; Wavelength tunable; Wavelength tuneable, Semiconductor quantum dots

International Standard Serial Number (ISSN)

0170-0839; 1436-2449

Document Type

Article - Journal

Document Version


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© 2016 Springer Verlag, All rights reserved.

Publication Date

01 Apr 2016