title: PbS/PbSe structures with core-shell type morphology synthesized from PbS nanocrystals.
abstract: Colloidal PbS/PbSe nanostructures with core-shell type morphology have been synthesized for the first time using a simple chemical procedure where template PbS nanocrystals (NCs) were treated with Se solution in tributylphosphine at elevated temperature. The Se-coated PbS NCs were structurally and optically characterized by high resolution transmission electron microscopy (HRTEM), x-ray diffraction (XRD), Rutherford backscattering spectrometry (RBS) analysis, absorption and photoluminescence (PL) spectroscopy. Synthesized PbS/PbSe structures can be of particular importance in photovoltaic applications where fabrication of heterostructures with compositional modulation on the nanometer scale is essential.
authors.affiliation: Department of Chemistry, Vanderbilt University, Station B 351822, Nashville, TN 37235, USA. dmitry.koktysh@vanderbilt.edu
authors.forename: Dmitry S
authors.initials: DS
authors.lastname: Koktysh
authors.forename: James R
authors.initials: JR
authors.lastname: McBride
authors.forename: Sriram K
authors.initials: SK
authors.lastname: Dixit
authors.forename: L C
authors.initials: LC
authors.lastname: Feldman
authors.forename: Sandra J
authors.initials: SJ
authors.lastname: Rosenthal