Observation of large changes in the band gap absorption energy of small CdSe nanoparticles induced by the adsorption of a strong hole acceptor

TitleObservation of large changes in the band gap absorption energy of small CdSe nanoparticles induced by the adsorption of a strong hole acceptor
Publication TypeJournal Article
Year of Publication2001
AuthorsLandes, CF, Braun, M, Burda, C, EL-Sayed, MA
JournalNano Letters
Volume1
Pagination667-670
Date PublishedNov
ISBN Number1530-6984
Accession NumberWOS:000173721800016
Abstract

When butylamine In relatively high concentrations (0.1-0.25 M) is added to a colloidal solution of CdSe nanoparticles (NPs) that are approximately 1.6 nm in diameter, the band gap absorption changes from a broad, relatively weak absorption centered at 445 nm to a narrow, relatively strong absorption centered at 414 nm. The effect of concentration on the observed spectrum shows an isobestic point, suggesting an equilibrium between two species. The possible mechanisms for such a transformation are discussed.

DOI10.1021/nl015619t