@article {1216, title = {Observation of large changes in the band gap absorption energy of small CdSe nanoparticles induced by the adsorption of a strong hole acceptor}, journal = {Nano Letters}, volume = {1}, number = {11}, year = {2001}, note = {Landes, C Braun, M Burda, C El-Sayed, MA}, month = {Nov}, pages = {667-670}, 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.}, isbn = {1530-6984}, doi = {10.1021/nl015619t}, author = {Landes, Christy F. and Braun, Markus and Burda, Clemens and El-Sayed, Mostafa A} }