Interaction of CdSe and ZnO nanocrystals with electron-donor and -acceptor molecules

Dey, Sunita and Das, Barun and Voggu, Rakesh and Nag, Angshuman and Sarma, DD and Rao, CNR (2013) Interaction of CdSe and ZnO nanocrystals with electron-donor and -acceptor molecules. In: CHEMICAL PHYSICS LETTERS, 556 . pp. 200-206.

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Abstract

Interaction of CdSe and ZnO nanocrystals with electron-donating tetrathiafulvalene (TTF) and electron-withdrawing tetracyanoethylene (TCNE) has been investigated. Isothermal calorimetry shows CdSe nanocrystals interact more strongly with TCNE than TTF. Interaction of larger CdSe nanocrystals with TCNE causes a red-shift in the band-edge emission because of agglomeration, while the smaller CdSe nanocrystals, exhibiting stronger interaction with TCNE modify the optical gap of the nanocrystal. Luminescence of CdSe gets quenched sharply after addition of both TTF and TCNE. ZnO nanocrystals also exhibit luminescence quenching to lesser extent. Defect-emission of ZnO nanocrystals gets red or blue-shifted after interaction with TTF or TCNE respectively. (C) 2012 Elsevier B. V. All rights reserved.

Item Type:	Journal Article
Publication:	CHEMICAL PHYSICS LETTERS
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copyright for this article belongs to ELSEVIER SCIENCE BV, NETHERLANDS
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	20 Feb 2013 08:47
Last Modified:	20 Feb 2013 08:47
URI:	http://eprints.iisc.ac.in/id/eprint/45816

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