期刊
ACS NANO
卷 8, 期 2, 页码 1511-1516出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn405627s
关键词
multi-segmented nanowire; capillary force; alignment; on-wire lithography; graphene nanoribbon; SERS
类别
资金
- AFOSR [FA9550-09-1-0294, FA9550-12-1-0280]
- AOARD [FA2386-13-1-4124]
- Office of the Asst. Secretary of Defense for Research and Engineering, DoD/NSSEFF Program/Naval Postgraduate School [N00244-09-1-0012, N00244-09-1-0071]
- Department of the Navy, Office of Naval Research [N00014-11-1-0729]
- Department of Defense
We report the large-area alignment of multi-segmented nanowires in nanoscale trenches facilitated by capillary forces. Electrochemically synthesized nanowires between 120 and 250 nm in length are aligned and then etched selectively to remove one segment, resulting in arrays of nanowires with precisely controlled gaps varying between 2 and 30 nm. Crucial to this alignment process is the dispersibility of the nanowires in solution which is achieved by chemically modifying them with hexadecyltrimethylammonium bromide. We that, even without the formation of an ordered crystalline phase at the droplet edges, the nanowires can be aligned in high yield. To illustrate the versatility of this approach as a nanofabrication technique, the aligned nanowires were used for the fabrication of arrays of gapped graphene nanoribbons and SERS substrates.
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