Surface reliefs (SR) in crystalline diacetylene (DA) films have been investigated. Blue polydiacetylene (PDA) was locally formed by irradiation of ultraviolet light through a photomask to DA crystalline films. Exposing these films to heat or organic solvent vapor led to surface relief formation by transfer of the DA in the unexposed area to the exposed area accompanied by the PDA color transition from blue to red. A highly photosensitive SR formation was attained and stable SR in the crystalline DA films were obtained.
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IWAMOTO et al. (2019) studied this question.
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