High-Sensitivity Bolometers from Self-Oriented Single-Walled Carbon Nanotube Composites

In this work, films of horizontally aligned single-walled carbon nanotubes were thermally and electrically characterized in order to determine the bolometric performance. An average thermal time constant of τ = 420 μs along with a temperature coefficient of resistance of TCR = −2.94% K–1 were obtain...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2011-08, Vol.3 (8), p.3200-3204
Main Authors: Vera-Reveles, Gustavo, Simmons, Trevor J, Bravo-Sánchez, Mariela, Vidal, M. A, Navarro-Contreras, Hugo, González, Francisco J
Format: Article
Language:English
Subjects:
Electricity
Nanotubes, Carbon - chemistry
Nanotubes, Carbon - ultrastructure
Polymers - chemistry
Surface-Active Agents - chemistry
Temperature
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Summary:In this work, films of horizontally aligned single-walled carbon nanotubes were thermally and electrically characterized in order to determine the bolometric performance. An average thermal time constant of τ = 420 μs along with a temperature coefficient of resistance of TCR = −2.94% K–1 were obtained. The maximum voltage responsivity and detectivity obtained were R V =230 V/W and D* = 1.22 × 108 cm Hz1/2/W, respectively. These values are higher than the maximum voltage responsivity (150 V/W) and maximum temperature coefficient of resistance (1.0% K–1) previously reported for carbon nanotube films at room temperature. The maximum detectivity was obtained at a frequency of operation of 1.25 kHz.
ISSN:1944-8244
1944-8252
DOI:10.1021/am2007036