Biphasic Route to Silica-Encapsulation of Quantum Dots
A new simple one-step method based on a biphasic solution route has been developed for encapsulating quantum dots (QDs) within a silica shell and transferring them into water. Our method keeps the photoluminescence properties (color and brightness) of core/shell CdSe/ZnS QDs intact
as well as their UV-visible absorption characteristics. The effectiveness of QDs transfer into water was found to be strongly dependent on the silica precursor conditions. After silica-coating, QDs exhibited increased robustness to high pressure and temperature conditions tested by a hydrothermal
treatment. This work provides a new approach to coat QDs with silica, which is simpler than current methods.
Keywords: SEMICONDUCTOR NANOPARTICLES; SILICA SHELL; WATER SOLUBLILIZATION
Document Type: Short Communication
Publication date: 01 October 2011
- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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