𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Optical properties of CdS nanocrystal covered by polymer chains on the surface

✍ Scribed by I. Umezu; R. Koizumi; K. Mandai; T. Aoki-Matsumoto; K. Mizuno; M. Inada; A. Sugimura; Y. Sunaga; T. Ishii; Y. Nagasaki

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
151 KB
Volume
66
Category
Article
ISSN
0167-9317

No coin nor oath required. For personal study only.

✦ Synopsis

We prepared novel CdS nanocrystal by colloid technique; CdS nanocrystal possessing polyethylene glycol tethered chains (PEG-TC) on the surface. A relatively sharp optical absorption peak was observed at around 3.4 eV. The size of the nanocrystal was estimated by the peak energy to be 4-5 nm in diameter. A very broad photoluminescence (PL) peak centered at 2.4 eV was observed when excited at 3.8 eV. The PL spectra excited at lower photon energy indicates that the PL peak is composed of 2.5, 2.3 and 1.7-1.8 eV peaks. When we excited the specimen below 2.7 eV, PL spectra of colloid solution and cast film of PEG-TC CdS was very different. The difference in the recombination processes between PEG-TC CdS ensemble and isolated PEG-TC CdS is discussed in the present paper.

πŸ“œ SIMILAR VOLUMES

Minimizing the surface effect of PDMS–gl
Minimizing the surface effect of PDMS–glass microchip on polymerase chain reaction by dynamic polymer passivation
✍ Yong-Mei Xia; Zhi-Shan Hua; Onnop Srivannavit; Ayse Bilge Ozel; Erdogan Gulari πŸ“‚ Article πŸ“… 2006 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 265 KB

## Abstract Polydimethyl siloxane (PDMS)–glass microchip has a very strong surface effect on polymerase chain reaction (PCR), leading to a very poor PCR yield. In the work reported here, practical dynamic passivation of surfaces of PDMS–glass microchip using polyethylene glycol (PEG) or polyvinylpy

Conformational and Dynamical Properties
Conformational and Dynamical Properties of the Isolated, Three-Dimensional Single- and Double-Tethered Polymer Chain on an Infinite Surface
✍ Miriam Fritsche; Dieter W. Heermann; Mariana Dutra; Claudette E. Cordeiro πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons 🌐 English βš– 416 KB

## Abstract By Monte Carlo simulations we provide insight into the isolated single‐ and double‐tethered (ST and DT) polymer chain attached to an impenetrable surface to elucidate open theoretical questions and guide future experiments investigating the impact of tethering on the genome packaging by

Some Reflection on the Evaluation of the
Some Reflection on the Evaluation of the Lewis Acid–Base Properties of Polymer Surfaces by Wetting Measurements
✍ Marco Morra πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 54 KB

work of adhesion against model acidic or basic liquids (3). In the second approach, described by Good, Van Oss, and Chaudury, an acid parameter The letter underlines the need for a reflection and a debate on and a basic parameter characteristic for each solid are calculated from the quantitative re