506-80-9Relevant articles and documents
Field-independent grating formation rate in a photorefractive polymer composite sensitized by CdSe quantum dots
Binks, David J.,West, David P.,Norager, Sebastian,O'Brien, Paul
, p. 7335 - 7341 (2002)
A photorefractive polymer composite sensitized by CdSe quantum dots was described. In contrast to most other photorefractive polymers reported, the hologram formation rate was observed to be independent of applied field. This result was explained by the low saturation field calculated for this material.
Core - Shell and hollow nanocrystal formation via small molecule surface photodissociation; Ag@Ag2Se as an example
Tan, Hua,Li, Shaping,Fan, Wai Yip
, p. 15812 - 15816 (2006)
Metallic Ag nanoparticles have been converted to Ag2Se nanoparticles at ambient temperature and open atmosphere by UV photodissociation of adsorbed CSe2 on the Ag core surface. The photolysis could be prevented at any stage yielding Ag@Ag2Se core - shell structures of different thickness. Depending on the initial Ag nanoparticle size, either hollow or filled nanocrystals of Ag2Se could be prepared. The Kirkendall effect has been proposed to account for the formation of hollow nanoparticles. A coated-sphere Drude model has been used to explain the redshift of the Ag plasmon band as a function of the Ag 2Se shell thickness as well as to provide the first estimates of the wavelength-dependent dielectric function of Ag2Se. This photochemical method might be especially promising for carrying out a direct room-temperature phototransformation of metallic into semiconductor nanostructures already assembled on surface templates.
FTIR studies of O(3P) atom reactions with CSe2, SCSe, and OCSe
Li, Shuping,Chwee, Tsz Sian,Fan, Wai Yip
, p. 11815 - 11822 (2008/10/09)
The overall rate coefficients of the reactions of CSe2, SCSe, and OCSe with O(3P) atom have been determined to be kCSe2 = (1.4 ± 0.2) × 10-10 cm3 molecule-1 s-1, kSCSe = (2.8 ± 0.3) × 10-11 cm3 molecule-1 s-1, and kOCSe = (2-4 ± 0.3) × 10-11 cm3 molecule -1 s-1 at 301-303 K using Fourier transform infrared (FTIR) absorption spectroscopy. The measurements have been accomplished by calibrating against the literature value of the rate coefficient for O( 3P) with CS2 (4 × 10-12 cm3 molecule-1s-1). A product channel giving OCSe in 32.0 ± 4.2% yield has been found for the O + CSe2 reaction. Although CO was also detected, its generation could be attributed to subsequent reactions of OCSe with O atoms. The corresponding reaction for O + SCSe gives OCS and OCSe as observable products, with their yields given as 32.2 ± 4.5 and 30.2 ± 3.3%, respectively. Computational studies using UB3LYP/aug-cc-PVTZ methods have been used particularly to determine the reaction pathways for the channels in which OCS or OCSe is produced.
