High performance multiwall carbon nanotube bolometers
High infrared bolometric photoresponse has been observed in multiwall carbon nanotube (MWCNT) films at room temperature. The observed detectivity D ∗ in exceeding 3.3 × 10 6 cm Hz 1 / 2 / W on MWCNT film bolometers is a factor of 7 higher than that obtained on the single-wall CNT (SWCNT) counterpa...
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| Veröffentlicht in: | Journal of applied physics 2010-10, Vol.108 (8), p.084305-084305-5 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | High infrared bolometric photoresponse has been observed in multiwall carbon nanotube (MWCNT) films at room temperature. The observed detectivity
D
∗
in exceeding
3.3
×
10
6
cm
Hz
1
/
2
/
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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| ISSN: | 0021-8979 1089-7550 |
| DOI: | 10.1063/1.3492633 |