Share Email Print
cover

Proceedings Paper

Vibrating property of single Ge based heterostructure nanowires
Author(s): Yao Zhang; Chunrui Wang; Jing Xu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Raman spectrum of single heterostructure nanowire can reflect its unusual lattice vibrations as well as the junction features. In this paper, we report Raman spectra of two morphologies of single Ge based heterostructure nanowire, that is, one is CdSe/Ge biaxial heterostructure nanowires(sample I), another is Ge nanowires is surrounded by CdSe nanoparticles (sample II), which is fabricated by one step thermal evaporation of CdSe and Ge powder. A new mode was observed in Raman spectrum of Ge nanowires surrounded by CdSe nanoparticles, which caused by the interaction of LO mode of CdSe and LO (TO) mode of Ge. The LO (TO) mode of Ge nanowire in CdSe/Ge biaxial heterostructure nanowires and Ge nanowires surrounded by CdSe nanoparticles all has a red-shift in comparison with that of Ge nanowires. The vibrational mode of CdSe in CdSe/Ge biaxial heterostructure nanowires has a red-shift. The vibrational mode of CdSe in Ge nanowires surrounded by CdSe nanoparticles has a blue-shift. The red-shift mode may be caused by quantum confinement effect. The blue-shift mode may be originated from tensile stress or high density of stacking defects. The vibrating mode of the heterostructure nanowires was much sensitive to stacking fault than to quantum confinement effect when the diameter of nanowire is larger than 300nm.

Paper Details

Date Published: 16 December 2013
PDF: 5 pages
Proc. SPIE 9068, Eighth International Conference on Thin Film Physics and Applications, 906812 (16 December 2013); doi: 10.1117/12.2051461
Show Author Affiliations
Yao Zhang, Donghua Univ. (China)
Chunrui Wang, Donghua Univ. (China)
Jing Xu, Donghua Univ. (China)


Published in SPIE Proceedings Vol. 9068:
Eighth International Conference on Thin Film Physics and Applications
Junhao Chu; Chunrui Wang, Editor(s)

© SPIE. Terms of Use
Back to Top