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%25 K -1 were obtained. The maximum voltage responsivity and detectivity obtained were R V =230 V/W and D* = 1.22 × 10 8 cm Hz 1/2/W, respectively. These values are higher than the maximum voltage responsivity (150 V/W) and maximum temperature coefficient of resistance (1.0%25 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. © 2011 American Chemical Society.

bolometers; carbon nanotubes; detectivity; infrared detectors; noise Aligned single-walled carbon nanotubes; Carbon nanotube films; detectivity; Frequency of operation; High-sensitivity; Maximum temperature; noise; Room temperature; Single-walled carbon; Temperature coefficient of resistance; Thermal time constants; Voltage responsivity; Bolometers; Carbon films; Detectors; Infrared detectors; Nanocomposite films; Single-walled carbon nanotubes (SWCN); carbon nanotube; polymer; surfactant; article; chemistry; electricity; temperature; ultrastructure; Electricity; Nanotubes, Carbon; Polymers; Surface-Active Agents; Temperature

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