Title: Unexpected optical response of single ZnO nanowires probed using controllable electrical contacts
Authors: Zeng, Yujia ×
Menghini, Mariela Andrea
Li, Danying
Lin, S. S
Ye, Z. Z
Hadermann, Jan
Moorkens, Tom
Seo, Jin Won
Locquet, Jean-Pierre
Van Haesendonck, Chris #
Issue Date: 2011
Publisher: Royal Society of Chemistry
Series Title: Physical Chemistry Chemical Physics vol:13 issue:15 pages:6931-6935
Abstract: Relying on combined electron-beam lithography and lift-off methods Au/Ti bilayer electrical contacts were attached to individual ZnO nanowires (NWs) that were grown by a vapor phase deposition method. Reliable Schottky-type as well as ohmic contacts were obtained depending on whether or not an ion milling process was used. The response of the ZnO NWs to ultraviolet light was found to be sensitive to the type of contacts. The intrinsic electronic properties of the ZnO NWs were studied in a field-effect transistor configuration. The transfer characteristics, including gate threshold voltage, hysteresis and operational mode, were demonstrated to unexpectedly respond to visible light. The origin of this effect could be accounted for by the presence of point defects in the ZnO NWs.
ISSN: 1463-9076
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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