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Self-assembly and photoluminescence of CdS-mercaptoacetic clusters with internal structures

✍ Scribed by H.M. Chen; X.F. Huang; L. Xu; J. Xu; K.J. Chen; D. Feng

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 247 KB
Volume: 27
Category: Article
ISSN: 0749-6036
DOI: 10.1006/spmi.1999.0794

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✦ Synopsis

CdS-mercaptoacetic (CdS/M) clusters were synthesized by using mercaptoacetic acid as the stabilizing agent in the aqueous solution. From the transmission electron microscopy (TEM) image and the electron diffraction (ED) pattern, a two-dimensional nearly ordered CdS/M cluster array is observed and the CdS/M cluster is found to be constructed of small CdS/M nanocrystals. The model of self-assembly of the CdS/M clusters with internal structure is presented. The absorption spectrum of the CdS/M nanocrystal solution reveals a maximum at 372 nm and the corresponding photoluminescence (PL) spectrum shows a strong peak at 556 nm at room temperature. The PL spectra of various concentrations of CdS/M reveal the passivation effect of mercaptoacetic acid.

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