Synthesis and characterization of a size series of extremely small thiol-stabilized CdSe nanocrystals

Research output: Journal Publications and ReviewsRGC 62 - Review of books or of software (or similar publications/items)peer-review

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Detail(s)

Original languageEnglish
Pages (from-to)3065-3069
Journal / PublicationJournal of Physical Chemistry B
Volume103
Issue number16
Publication statusPublished - 1999
Externally publishedYes

Abstract

As an expansion to the wet chemical route for the preparation of quantum-sized II-VI semiconductor materials, a series of thiol-capped crystalline CdSe nanoparticles has been synthesized in aqueous solution using mercapto-alcohols (2-mercaptoethanol, 1-thioglycerol), and mercapto acids (thioglycolic acid, thiolactic acid) as stabilizers. The smaller (app. 1.4-2.2 nm diameter) CdSe particles were obtained using thioalcohols as capping agents; the use of thioacids as stabilizers produced larger (2.1-3.2 nm diameter) CdSe particles. CdSe nanoparticles were separated from the crude solutions as redissolvable powder samples with narrow size distributions using a size-selective fractionation and have been characterized by UV-vis absorption and photoluminescence spectroscopy, X-ray diffraction, high-resolution transmission electron microscopy, and energy-dispersive X-ray analysis. A calculation of the HOMO-LUMO gap of CdSe particles as a function of their size has been done using an extended effective mass approximation. © 1999 American Chemical Society.

Citation Format(s)

Synthesis and characterization of a size series of extremely small thiol-stabilized CdSe nanocrystals. / Rogach, Andrey L.; Kornowski, Andreas; Gao, Mingyuan et al.
In: Journal of Physical Chemistry B, Vol. 103, No. 16, 1999, p. 3065-3069.

Research output: Journal Publications and ReviewsRGC 62 - Review of books or of software (or similar publications/items)peer-review