title: Spectroscopic properties of colloidal indium phosphide quantum wires.
abstract: Colloidal InP quantum wires are grown by the solution-liquid-solid (SLS) method, and passivated with the traditional quantum dots surfactants 1-hexadecylamine and tri-n-octylphosphine oxide. The size dependence of the band gaps in the wires are determined from the absorption spectra, and compared to other experimental results for InP quantum dots and wires, and to the predictions of theory. The photoluminescence behavior of the wires is also investigated. Efforts to enhance photoluminescence efficiencies through photochemical etching in the presence of HF result only in photochemical thinning or photooxidation, without a significant influence on quantum-wire photoluminescence. However, photooxidation produces residual dot and rod domains within the wires, which are luminescent. The results establish that the quantum-wire band gaps are weakly influenced by the nature of the surface passivation and that colloidal quantum wires have intrinsically low photoluminescence efficiencies.
authors.affiliation: Department of Chemistry and Physics, Washington University, St. Louis, Missouri 63130-4899, USA.
authors.forename: Fudong
authors.initials: F
authors.lastname: Wang
authors.forename: Heng
authors.initials: H
authors.lastname: Yu
authors.forename: Jingbo
authors.initials: J
authors.lastname: Li
authors.forename: Qingling
authors.initials: Q
authors.lastname: Hang
authors.forename: Dmitry
authors.initials: D
authors.lastname: Zemlyanov
authors.forename: Patrick C
authors.initials: PC
authors.lastname: Gibbons
authors.forename: Lin-Wang
authors.initials: LW
authors.lastname: Wang
authors.forename: David B
authors.initials: DB
authors.lastname: Janes
authors.forename: William E
authors.initials: WE
authors.lastname: Buhro