Journal
NANOSCALE RESEARCH LETTERS
Volume 7, Issue -, Pages 1-6Publisher
SPRINGEROPEN
DOI: 10.1186/1556-276X-7-505
Keywords
Bismuth nanowire; Hall measurement; focused ion beam; thermoelectrics
Funding
- NEDO
- Asahi Glass Foundation
- Japan Aluminum Association
- TEPCO Memorial Foundation
- National Institute for Fusion Science (NIFS) [NIFS11KECA012]
- NINS [NIFS08KEIN0091]
- Nanotechnology network program (Center for Nanotechnology Network, National Institute for Material Science) of the Ministry of Education, Culture, Sports, Science and Technology
- Grants-in-Aid for Scientific Research [11J08106, 23560828, 22560004] Funding Source: KAKEN
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Forming electrodes on opposite sides of an individual bismuth nanowire was attempted to prepare for Hall measurements. Although a 1-mm-long bismuth nanowire which is completely covered with a quartz template has been successfully fabricated to prevent oxidation, it is very difficult to attach Hall electrodes on the opposite sides of the nanowire due to the quartz covering. One side of the cylindrical quartz template was removed by polishing without exposure of the nanowire to the atmosphere; the thickness between the polished template surface and the nanowire was estimated to be several micrometers. Focused ion beam processing was successfully employed to expose both surfaces of the nanowire under high vacuum by removing part of the quartz template. A carbon thin film was then deposited in situ on the wire surface to fabricate an electrical contact on the bismuth nanowire sample. Furthermore, the energy dispersive X-ray analysis was performed to the area processed by focused ion beam, and the bismuth component of the nanowire was successfully detected. It was confirmed that the focused ion beam processing was applicable to attach electrodes to bismuth nanowire for Hall measurement.
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