Fully aromatic polyimide films containing uniformly oriented Ag nanorods (see Figure) have been prepared by a simple method consisting of thermal curing and uniaxial drawing of submicrometer-scale phase-separated polyimide-blend films containing dissolved AgNO3. The films exhibit outstanding optical dichroism, over 20 dB (see inset), in the near-IR region due to the high aspect ratio of the nanorods and the high transparency of the matrix.
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Matsuda et al. (2005) studied this question.
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