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The evaluation of a pyroelectric detector with and without a sprayed multi-walled carbon nanotube coating.

Theocharous, E; Lehman, J* (2012) The evaluation of a pyroelectric detector with and without a sprayed multi-walled carbon nanotube coating. Infrared Phys. Technol., 55 (1). pp. 161-165.

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Abstract

The radiometric properties of a pyroelectric detector based on a LiTaO3 crystal were studied with a sprayed multi-walled carbon nanotube (MWCNT) coating and with the coating removed. The spatial uniformity of response of the bare detector improved as the modulation frequency increased in the 4 Hz to 70 Hz range whereas the spatial uniformity of response of the coated detector deteriorated as the modulation frequency increased over the same range. Similarly, the uncoated detector was observed to have a 'super-linear' response whereas the linearity of response of the coated detector was shown to be 'normal'. The origin and implications of this behaviour are discussed.

Item Type: Article
Keywords: Black coatings, Carbon nanotubes, Infrared absorbance, Linearity, Pyroelectric detectors, Responsivity
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Radiometry and Detectors
Identification number/DOI: 10.1016/j.infrared.2011.11.002
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5367

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