title: Diameter scaling of the optical band gap in individual CdSe nanowires.
abstract: The diameter dependence of the optical band gap of single CdSe nanowires (NWs) is investigated by a combination of atomic force microscopy, scanning fluorescence microscopy, and transmission electron microscopy. We find a good congruence of the experimental data to calculations within the effective mass approximation taking into account quantization, exciton Coulomb interaction, and dielectric mismatch. The experimental data are furthermore compared to different theoretical approaches. We discuss the influence of alternating wurtzite and zinc blende segments along the NWs on their optical properties.
authors.affiliation: Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany.
authors.forename: Anton
authors.initials: A
authors.lastname: Myalitsin
authors.forename: Christian
authors.initials: C
authors.lastname: Strelow
authors.forename: Zhe
authors.initials: Z
authors.lastname: Wang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.forename: Tobias
authors.initials: T
authors.lastname: Kipp
authors.forename: Alf
authors.initials: A
authors.lastname: Mews
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D008962:Models, Theoretical; D053770:Nanowires / Q000737:chemistry*; D055620:Optical Phenomena; D018036:Selenium Compounds / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; C058667:cadmium selenide