期刊
NANO LETTERS
卷 12, 期 4, 页码 1879-1884出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl204259t
关键词
Carbon nanotube; nanowire; transducer; on-wire lithography; template-directed synthesis
类别
资金
- MEST [2011-00240, 20110020984]
- National Research Foundation [2011-0000390]
- Converging Research Center [2011K000683]
- Asian Office of Aerospace Research and Development (AOARD)
- Electrochemical Society
We report a simple but efficient method to synthesize carbon nanotube-bridged wires (NBWs) with gaps as small as 5 nm. In this method, we have combined a strategy for assembling carbon nanotubes (CNTs) inside anodized aluminum oxide pones and the on-wire lithography technique to fabricate CNT-bridged wires with gap sizes deliberately tailored over the 5-600 nm range. As a proof-of-concept demonstration of the utility of this architecture, we have prepared NBW-based chemical and biosensors which exhibit higher analyte sensitivity (lower limits of detection) than those based on planar CNT networks. This observation is attributed to a greater surface-to-volume ratio of CNTs in the NBWs than those in the planar CNT devices. Because of the ease of synthesis and high yield of NBWs, this technique may enable the further incorporation of CNT-based architectures into various nanoelectronic and sensor platforms.
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