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Author Zhang, C. ♦ Golberg, D. ♦ Xu, Z. ♦ Kvashnin, D. G. ♦ Tang, D. -M. ♦ Xue, Y. M. ♦ Bando, Y. ♦ Sorokin, P. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ BENDING ♦ DESIGN ♦ EV RANGE 01-10 ♦ ILLUMINANCE ♦ NANOWIRES ♦ RESOLUTION ♦ SCANNING TUNNELING MICROSCOPY ♦ SIMULATION ♦ SPECTRA ♦ SPECTROSCOPY ♦ STRAINS ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ VALENCE ♦ ZINC OXIDES
Abstract Photocurrent spectroscopy of individual free-standing ZnO nanowires inside a high-resolution transmission electron microscope (TEM) is reported. By using specially designed optical in situ TEM system capable of scanning tunneling microscopy probing paired with light illumination, opto-mechano-electrical tripling phenomenon in ZnO nanowires is demonstrated. Splitting of photocurrent spectra at around 3.3 eV under in situ TEM bending of ZnO nanowires directly corresponds to nanowire deformation and appearance of expanded and compressed nanowire sides. Theoretical simulation of a bent ZnO nanowire has an excellent agreement with the experimental data. The splitting effect could be explained by a change in the valence band structure of ZnO nanowires due to a lattice strain. The strain-induced splitting provides important clues for future flexible piezo-phototronics.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-08-31
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 9


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