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Continuous synthesis of high quality CdSe quantum dots in supercritical fluids

Chakrabarty, Arkajyoti and Marre, Samuel and Landis, Ryan F and Rotello, Vincent M and Maitra, Uday and Del Guerzo, Andre and Aymonier, Cyril (2015) Continuous synthesis of high quality CdSe quantum dots in supercritical fluids. In: JOURNAL OF MATERIALS CHEMISTRY C, 3 (29). pp. 7561-7566.

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Official URL: http://dx.doi.org/10.1039/c5tc01115a

Abstract

We demonstrate in here a powerful scalable technology to synthesize continuously high quality CdSe quantum dots (QDs) in supercritical hexane. Using a low cost, highly thermally stable Cd-precursor, cadmium deoxycholate, the continuous synthesis is performed in 400 mu m ID stainless steel capillaries resulting in CdSe QDs having sharp full-width-at-half-maxima (23 nm) and high photoluminescence quantum yields (45-55%). Transmission electron microscopy images show narrow particles sizes distribution (sigma <= 5%) with well-defined crystal lattices. Using two different synthesis temperatures (250 degrees C and 310 degrees C), it was possible to obtain zinc blende and wurtzite crystal structures of CdSe QDs, respectively. This synthetic approach allows achieving substantial production rates up to 200 mg of QDs per hour depending on the targeted size, and could be easily scaled to gram per hour.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre: Division of Chemical Sciences > Organic Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 19 Aug 2015 07:04
Last Modified: 19 Aug 2015 07:04
URI: http://eprints.iisc.ac.in/id/eprint/52163

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