Transient optical properties of novel PbS nanoparticles coated with 2,6-O-diallyl-β-CD

• Published in: Journal of luminescence Vol. 82; no. 2; pp. 111 - 114
• Main Authors: Guo, L, Ibrahim, K, Liu, F.Q, Ai, X.C, Li, Q.S, Zhu, H.S, Zou, Y.H
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-08-1999; Elsevier
• Subjects: 2,6-O-diallyl-β-CD; Amorphous semiconductors; glasses; Amorphous semiconductors; glasses; nanocrystalline materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of specific thin films; PbS nanoparticles; Physics; Semiconductors; Small particles; Surface chemical modification; Ultransient-induced absorption; Visible and ultraviolet spectra; 2,6-O-diallyl-β-CD; Surface chemical modification; PbS nanoparticles; Ultransient-induced absorption; Inorganic compounds; Lead sulfides; Narrow band gap semiconductors; Ultraviolet spectra; Absorption spectra; Experimental study; Nanostructured materials; Coated material; Particles; Transients
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/S0022-2313(99)00039-3

The transient optical properties of novel PbS nanoparticles coated with 2,6-O-diallyl-β-cyclodextrines (CDs) were studied by the femtosecond pump–probe technique. The results show that the ultrafast transient-induced absorption for the novel case. Compared to the PbS nanoparticles stabilized with polyvinyl alcohol (PVA), we find that the process for the novel case is different from the PbS(PVA). We suggest that the CDs surface modification can trap holes on the surface of PbS nanoparticles. This can induce an efficient charge separation between the PbS nanoparticles and its surface and result in an ultrafast-induced absorption for novel PbS nanoparticles.