| Budget Amount *help |
¥3,680,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Research Abstract |
Light-driven actuators that reversibly change shape and/or size have much attention because they can allow remote operation without the need for direct contact. The diarylethene crystals are deformed upon irradiation with ultraviolet light, and the deformed crystals are thermally stable and return to the original state upon irradiation with visible light. The crystals respond in about 25 microseconds in shape changes and they can move microscopic objects. Correlation between the photoinduced shape changes of diarylethene single crystals and their molecular packing in the crystals was also studied. Although these three diarylethenes have different electronic structures and exhibit different colors upon UV irradiation, the crystallographic structures and molecular paking of the crystals are very similar to each other. The result indicates that the deformation mode is determined
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