Preparation of ultrafine chalcopyrite nanoparticles via the photochemical decomposition of molecular single-source precursors.
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.
Nairn
Justin J
JJ
Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, USA.
Shapiro
Pamela J
PJ
Twamley
Brendan
B
Pounds
Tyler
T
von Wandruszka
Ray
R
Fletcher
T Rick
TR
Williams
Mark
M
Wang
Chongmin
C
Norton
M Grant
MG
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*
C012819:chalcopyrite; D003300:Copper