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Dielectric function of carbon nanotube coated thermal detectors



John H. Lehman


The absolute responsivity of a thermal detector depends on its absorption efficiency as a function of wavelength. We present experiments and document the results for carbon nanotube (CNT) based coatings for thermal detectors. The results indicate that the spectral absorption properties of bulk carbon single wall nanotubes (applied by airbrush) and carbon multiwall nanotubes (grown in situ) depend on the CNT type (metallic or semiconductor), topology and purity. Unlike conventional spectroscopic methods, our technique allows determination of optical properties from a specular absorptivity at normal incidence rather than a small diffuse reflectivity (
Conference Dates
November 14, 2005
Conference Location
Boulder, CO
Conference Title
CU/NIST Fall Symposium


absolute responsivity, carbon nanotubes, dielectric function, thermal diffusivity


Lehman, J. (2005), Dielectric function of carbon nanotube coated thermal detectors, CU/NIST Fall Symposium, Boulder, CO, [online], (Accessed April 14, 2024)
Created November 14, 2005, Updated January 27, 2020