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Vibrational spectra of quantum dots formed by Langmuir–Blodgett technique

Authors :
Nikolay V. Surovtsev
Li Ding
T. A. Duda
Larisa L. Sveshnikova
Sergey V. Adichtchev
Dietrich R. T. Zahn
Alexander G. Milekhin
Source :
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena. 28:C5E22-C5E24
Publication Year :
2010
Publisher :
American Vacuum Society, 2010.

Abstract

Phonon spectra of CdS, ZnS, PbS, CuS, Ag2S, and ZnO quantum dots formed by using the Langmuir–Blodgett technology are investigated by Raman and infrared spectroscopies. The Raman spectra of structures show peaks corresponding to the scattering by longitudinal and transverse optical (LO and TO) phonons localized in quantum dots that confirm the formation of nanocrystals. In addition to TO and LO phonon modes, the modes observed in the IR spectra between the frequency positions of LO and TO phonons are attributed to the surface optical phonons in quantum dots.

Details

ISSN :
21662754 and 21662746
Volume :
28
Database :
OpenAIRE
Journal :
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena
Accession number :
edsair.doi...........24fa88414bfe16a7094f7da33c577e64
Full Text :
https://doi.org/10.1116/1.3442799