25 Photoresponsive Molecular Crystals …
443
(a)
(b)
Fig. 25.18 Photoreversible current switching operated by a gold-coated diarylethene crystal of
2. The crystal thickness is 6.2 µm. The gold thickness is 21 nm. The applied voltage is 1.0 V.
The external resistance is 2 k. Adapted from Ref. [15] with permission of The Royal Society of
Chemistry
the irradiation wavelength, polarization direction, irradiation surface, and so on. The
difference in the velocity is due to the difference in reaction depth caused by UV light
irradiation. In some cases, not only simple bending behavior but also cylindrical helix
and twisting were observed by changing the irradiation direction. These achievements
play an important role in the development of photoactuators of molecular crystals.
443
(a)
(b)
Fig. 25.18 Photoreversible current switching operated by a gold-coated diarylethene crystal of
2. The crystal thickness is 6.2 µm. The gold thickness is 21 nm. The applied voltage is 1.0 V.
The external resistance is 2 k. Adapted from Ref. [15] with permission of The Royal Society of
Chemistry
the irradiation wavelength, polarization direction, irradiation surface, and so on. The
difference in the velocity is due to the difference in reaction depth caused by UV light
irradiation. In some cases, not only simple bending behavior but also cylindrical helix
and twisting were observed by changing the irradiation direction. These achievements
play an important role in the development of photoactuators of molecular crystals.