title: Preparation of ultrafine chalcopyrite nanoparticles via the photochemical decomposition of molecular single-source precursors.
abstract: The synthesis and characterization of ultrafine CuInS2 nanoparticles are described. Ultraviolet irradiation was used to decompose a molecular single source precursor, yielding organic soluble approximately 2 nm sized nanoparticles with a narrow size distribution. UV-vis absorption, 1H and 31P{1H} NMR, and fluorescence spectroscopies and mass spectrometry were used to characterize decomposition of the precursors and nanoparticle formation. The nanoparticles were characterized by high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy energy dispersive X-ray spectroscopy, powder X-ray diffraction (XRD), electron diffraction, inductively coupled plasma analysis, UV-vis absorption spectroscopy, and fluorescence spectroscopy. They have a wurzite-type crystal structure with a copper-rich composition. The hypsochromic shift in their emission band due to quantum confinement effects is consistent with the size of the nanocrystals indicated in the HRTEM and XRD analyses.
authors.affiliation: Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, USA.
authors.forename: Justin J
authors.initials: JJ
authors.lastname: Nairn
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Shapiro
authors.forename: Brendan
authors.initials: B
authors.lastname: Twamley
authors.forename: Tyler
authors.initials: T
authors.lastname: Pounds
authors.forename: Ray
authors.initials: R
authors.lastname: von Wandruszka
authors.forename: T Rick
authors.initials: TR
authors.lastname: Fletcher
authors.forename: Mark
authors.initials: M
authors.lastname: Williams
authors.forename: Chongmin
authors.initials: C
authors.lastname: Wang
authors.forename: M Grant
authors.initials: MG
authors.lastname: Norton
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D003300:Copper / Q000737:chemistry* / Q000302:isolation & purification* / Q000528:radiation effects; D003460:Crystallization / Q000379:methods*; D008027:Light; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D010777:Photochemistry / Q000379:methods*
chemical_list: C012819:chalcopyrite; D003300:Copper