In Situ Confocal Raman Mapping Study of a Single Ti-Assisted ZnO Nanowire
Department of Physics, National Dong Hwa University, Hualien, 97401, Taiwan
Nanoscale Research Letters 2009, 5:581-586 doi:10.1007/s11671-009-9509-1Published: 30 December 2009
In this work, we succeeded in preparing in-plane zinc oxide nanowires using a Ti-grid assisted by the chemical vapor deposition method. Optical spatial mapping of the Confocal Raman spectra was used to investigate the phonon and geometric properties of a single ZnO nanowire. The local optical results reveal a red shift in the non-polar E2 high frequency mode and width broadening along the growth direction, reflecting quantum-confinement in the radial direction.