Title :
Study of surfactant bonding to lead telluride nanoparticles
Author :
Todosiciuc, A. ; Nicorici, A. ; Braginsky, Leonid ; Gutsul, T. ; Shklover, V.
Author_Institution :
Inst. of Electron. Eng. & Ind. Technol. AS, Chisinau, Moldova
Abstract :
Colloidal suspensions of PbTe nanoparticles coated with oleic acid were obtained using a high-temperature solution phase method. Bonding between the oleic acid and nanoparticles was investigated using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy. The results indicated that oleic acid coordinated the nanoparticles symmetrically through carboxyl groups, and the interaction modes were bridging bidentate and chelating interactions. The strong coordination by the capping monolayer made the nanoparticles stable against oxidation. Nanocrystalline PbTe exhibited electrical conductivity, which itself had an activation character with increasing temperature.
Keywords :
Fourier transform spectra; IV-VI semiconductors; X-ray photoelectron spectra; colloids; electrical conductivity; high-temperature effects; infrared spectra; lead compounds; monolayers; nanoparticles; nanotechnology; organic compounds; oxidation; surfactants; suspensions; FTIR spectra; Fourier transform infrared spectra; PbTe; X-ray photoelectron spectra; bidentate interactions; carboxyl groups; chelating interactions; colloidal suspensions; electrical conductivity; high-temperature solution phase method; lead telluride nanoparticles; monolayer; nanocrystalline material; oleic acid; oxidation; surfactant bonding; Bonding; Conductivity; Fourier transforms; Infrared spectra; Lead compounds; Nanoparticles; Oxidation; Spectroscopy; Suspensions; Temperature;
Conference_Titel :
Semiconductor Conference, 2009. CAS 2009. International
Conference_Location :
Sinaia
Print_ISBN :
978-1-4244-4413-7
DOI :
10.1109/SMICND.2009.5336588
