Transition energies, extinction coefficient and oscillator strength in PbS colloidal quantum dots

INOR 62

Ludovico Cademartiri, lcademar@chem.utoronto.ca1, Erica Montanari2, Andrea Migliori3, Antonietta Guagliardi4, Gianluca Calestani2, and Geoffrey A. Ozin, gozin@chem.utoronto.ca 1. (1) Department of Chemistry, University of Toronto, 80, St. George Street, Toronto, ON M5S 3H6, Canada, (2) Universita' di Parma, Parma, Italy, (3) CNR-IMM, Bologna, Italy, (4) CNR-IC, Bari, Italy
We hereby report on the detailed characterization of the size dependence of several optical properties of colloidal PbS quantum dots. Seven transitions have been monitored in their variation with size and the results are compared with available theories. The molar extinction coefficients per particle (as well as the absorption cross section per particle) are also measured in their size dependence and they are found to be strongly size dependent. If time will allow we will further discuss on our results on the oscillator strength of the lowest 1S-1S transition.
 

Nanoscience: Synthesis and Characterization
8:30 AM-12:10 PM, Sunday, August 19, 2007 BCEC -- 209, Oral

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007