Application of carbon nanotubes to Optical radiation absorber
Standard thermal optical radiation detector of which the spectral responsrvrty is constant is necessary, when the spectral responsivity of the optical radiation detector is calibrated. The carbon nanotubes (CNT) of which absorptance and thermal conductivity are high in visible range are applied to the absorber. The multiple reflection of optical radiation is generated in the inside of CNT, and it is expected that the high-performance standard thermal optical radiation detector with planar structure can be realized. The catalytic chemical vapour deposition (Cat-CVD) which can deposit CNT on the low temperature substrate has been examined. Cat-CVD is a method using the decomposition reaction between the material gases and the heated catalyst. The catalytic efficiency has been estimated on the catalysts of Ni, Fe, W, SUS304 and NCHW1 which are generally used as the catalysts of CNT. As the results, Fe is selected as the catalyst. When Fe is used as a catalyst, the deposition conditions are examined. CNT is deposited on the substrate with the condition of the catalyst temperature 1100℃, the substrate temperature 750℃, the reactant gas pressure 70 Pa and the reaction time 240 minutes. As the result of measuring the absorption characteristic of the deposited CNT, the spectral absorptance in visible range is independent on the wavelength and the average of spectral absorptance is 99.0 ％. The result of the surface observation by the scanning electron microscope showed that the diameter of CNT is 200-600 nm and the thickness is about 15 μm. As the results, CNT which are deposited by Cat-CVD sufficiently function as the optical radiation absorber.
Thermal detector optical radiation absorber carbon nanotubes (CNT) Cat-CVD
Nissato Masami Yaji Tamaki Ohtani Fumio
Graduate School of Science and Engineering, Saitama University
国际会议
26th Session of the CIE(国际照明委员会（CIE）第26届大会)
北京
英文
343-346
2007-07-04（万方平台首次上网日期，不代表论文的发表时间）