In this work, bolometric films of horizontally aligned single-walled carbon nanotubes were self-assembled from a colloidal solution. The polymeric surfactant polyvinylpyrrolidone and the amphiphilic surfactant sodium dodecylbenzenesulfonate were used to disperse the carbon nanotubes in water, and these nanotubes were subsequently deposited on silica and glass substrates. These bolometric films were then thermally and electrically characterized in order to determine the bolometric performance. Thermal time constants of of less than t = 420 �s along with temperature coefficient of resistance values higher than TCR = 2.94%K-1 were obtained. The maximum voltage responsivity and detectivity obtained were RV =230 V/W and D* = 1.22 x 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 bolometers at room temperature.

Facile self-assembly of high-performance carbon nanotube bolometers from a colloidal dispersion

244th National Meeting (2012)

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