Preparation and characterization of polymer-capped CdS nanocrystals

Poly(vinyl pyrrolidone) (PVP)-capped CdS nanoparticles were prepared with CS 2 as the sulfur source through the hydrothermal process. The obtained nanoparticles were characterized by X-ray diffraction, transmission electron microscopic, ultraviolet–visible and fluorescence spectroscopy. The capped C...

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Veröffentlicht in:	The Journal of physics and chemistry of solids 2003-03, Vol.64 (3), p.455-458
Hauptverfasser:	Liu, S.H., Qian, X.F., Yin, J., Ma, X.D., Yuan, J.Y., Zhu, Z.K.
Format:	Artikel
Sprache:	eng
Schlagworte:	A. Chalcogenides Condensed matter: electronic structure, electrical, magnetic, and optical properties D. Luminescence Exact sciences and technology Ii-vi semiconductors N. Nanoparticles Nanocrystals and nanoparticles Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures Photoluminescence Physics
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Zusammenfassung:	Poly(vinyl pyrrolidone) (PVP)-capped CdS nanoparticles were prepared with CS 2 as the sulfur source through the hydrothermal process. The obtained nanoparticles were characterized by X-ray diffraction, transmission electron microscopic, ultraviolet–visible and fluorescence spectroscopy. The capped CdS nanoparticles showed remarkable stability and significantly enhanced luminescence property compared with that of the noncapped ones. We attributed this observation to the surface passivation of the CdS nanoparticles by the PVP molecules.
ISSN:	0022-3697 1879-2553
DOI:	10.1016/S0022-3697(02)00333-5