Fullerene C60 immobilized in polymethylmethacrylate film as an optical temperature sensing materialY. Amao1 and I. Okura2
1 Fluid Science Research Center, National Aerospace Laboratory, Jindaiji-higashi, Chofu, Tokyo 182-8522, Japan
2 Department of Bioengineering, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8501, Japan
(Received September 8, 2000; revised October 24, 2000; accepted October 25, 2000.)
A new optical temperature sensor based on the fluorescence intensities of the fullerene C60 immobilized in polymethylmethacrylate (PMMA) film was developed. The fluorescence intensity of the C60 film decreased with increasing the temperature in the range 260-373 K. Arrhenius plot of ln[ ( )] versus 1/T for the C60 film exhibits considerable linearity supported by the correlation factor, r2, estimated to be 0.989 by the least squares method ( = 260 K). The E/R value of the C60 film is estimated to be 22.3 K. These results indicate that the C60 film provides a linear temperature response in the range 260-373 K.
Key words: Optical temperature sensing -- fullerene -- fluorescence quenching -- Arrhenius activation energy -- polymer film.
© EDP Sciences, Wiley-VCH 2000