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Kapton-derived carbon as efficient terahertz absorbers.

Authors :
Venkatachalam, S.
Bertin, D.
Ducournau, G.
Lampin, J.F.
Hourlier, D.
Source :
Carbon. Apr2016, Vol. 100, p158-164. 7p.
Publication Year :
2016

Abstract

The focus of this study is the preparation of carbon-based materials that satisfy the requirements of developing quasi-optic controllable absorbers for terahertz technology. These materials have been obtained from a commercially available organic polymer, Kapton ® HN polyimide, through a pyrolysis process conducted in an inert atmosphere at different temperatures. The pyrolysis of Kapton film up to 1200 °C left a black residue principally composed of graphitic-carbon with a yield of about 55%. The D.C. conductivity of materials measured at 295 K increases with increasing pyrolysis temperature. The starting organic polymer is turned from an insulator to conductor material when heat-treated at over 700 °C. Moreover, in the frequency range 220–500 GHz, the pyrolyzed materials show distinct optical properties, which have variant degrees of terahertz absorption. Kapton ® HN polyimide that is thermally converted into carbon-based materials may be used for the realization of calibrated terahertz absorbers, particularly for thermal transducers. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00086223
Volume :
100
Database :
Academic Search Index
Journal :
Carbon
Publication Type :
Academic Journal
Accession number :
112948466
Full Text :
https://doi.org/10.1016/j.carbon.2016.01.003