High Performance Multiwall Carbon Nanotube Bolometers
KANSAS UNIV LAWRENCE DEPT OF PHYSICS AND ASTRONOMY
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High infrared bolometric photoresponse has been observed in multiwall carbon nanotube MWCNT films at room temperature. The observed detectivity D in exceeding 3.3 x 1000000 cm Hz12 W on MWCNT film bolometers is a factor of 7 higher than that obtained on the single-wall CNT SWCNT counterparts. The response time of about 1 2 ms on MWCNT bolometers is more than an order of magnitude shorter than that of SWCNT bolometers. The observed high performance may be attributed to the naturally suspended inner-shell structure in a MWCNT, which enhances photon absorption and restricts bolometer external thermal link to environment.
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