Optical phonon spectra of GaP nanoparticles prepared by nanochemistry

Manciu, F. S.; Sahoo, Y.; MacRae, D. J.; Furis, M.; McCombe, B. D.; Prasad, P. N.
June 2003
Applied Physics Letters;6/9/2003, Vol. 82 Issue 23, p4059
Academic Journal
Gallium phosphide (GaP) nanoparticles have been synthesized by colloidal nanochemistry with two different surfactants: trioctylphosphine oxide and dodecylamine. Transverse optical (bulk) and surface optical phonons associated with the GaP nanoparticles were observed and studied experimentally by infrared transmission spectroscopy of a solid dispersion of these nanoparticles in cesium iodide pellets. These vibrational properties of the nanoparticles were used to obtain information about the crystallinity and surface interactions. The crystallinity and the stoichiometry of the samples were also examined and characterized by transmission electron microscopy, electron diffraction, and energy dispersive x-ray spectroscopy.


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