Surface transformation and photoinduced recovery in CdSe nanocrystals

Authors
Hess, BC Okhrimenko, IG Davis, RC Stevens, BC Schulzke, QA Wright, KC Bass, CD Evans, CD Summers, SL
Citation
Bc. Hess et al., Surface transformation and photoinduced recovery in CdSe nanocrystals, PHYS REV L, 86(14), 2001, pp. 3132-3135
Citations number
21
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
14
Year of publication
2001
Pages
3132 - 3135
Database
ISI
SICI code
0031-9007(20010402)86:14<3132:STAPRI>2.0.ZU;2-P
Abstract
CdSe nanocrystals in solution and films can enter a metastable state in whi ch the highly luminescent nanocrystals become dark. This change, which we a ttribute to a surface transformation, can be caused by heating or by changi ng the environment of the nanocrystals at room temperature. The metastable transformation is reversed upon illumination of above-band-gap light, at wh ich point the nanocrystals are again highly luminescent.