Superelasticity of a photo-actuating chiral salicylideneamine crystal.
Superelasticity of a photo-actuating chiral salicylideneamine crystal.
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DOI：
10.1038/s42004-021-00618-8
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发表时间：
2022-01-10
影响因子：
5.9
通讯作者：
Asahi, Toru
中科院分区：
文献类型：
--
作者：
Taniguchi, Takuya;Ishizaki, Kazuki;Takagi, Daisuke;Nishimura, Kazuki;Shigemune, Hiroki;Kuramochi, Masahiro;Sasaki, Yuji C.;Koshima, Hideko;Asahi, Toru
超弹性是一种对由相变引起的外力的弹性响应。材料的驱动也是对光和热等外部刺激的弹性响应。尽管超弹性和驱动都是由刺激引起的应力引起的变形，但就力是输入还是输出而言，两者之间存在现象学差异。在这里，我们报道了分子晶体在光照射下的光驱动过程中表现出超弹性。由于光异构化和光触发相变两种效应，晶体表现出逐步扭曲的驱动，并且基于动态多层模型模拟了驱动行为。模拟反过来揭示了晶体中光异构化和相变的进展情况，表明由于光产物形成而产生的适度应力引起的超弹性。这项工作不仅成功模拟了逐步扭转驱动，而且据我们所知，首次表明了光引起的超弹性。刺激响应分子有机晶体作为驱动材料引起人们的兴趣，但人们对它们的机械响应通常知之甚少。在这里，作者研究了手性水杨胺晶体的光触发相变，并揭示了光照射引起的超弹性行为。
Superelasticity is a type of elastic response to an applied external force, caused by a phase transformation. Actuation of materials is also an elastic response to external stimuli such as light and heat. Although both superelasticity and actuation are deformations resulting from stimulus-induced stress, there is a phenomenological difference between the two with respect to whether force is an input or an output. Here, we report that a molecular crystal manifests superelasticity during photo-actuation under light irradiation. The crystal exhibits stepwise twisted actuation due to two effects, photoisomerization and photo-triggered phase transition, and the actuation behavior is simulated based on a dynamic multi-layer model. The simulation, in turn, reveals how the photoisomerization and phase transition progress in the crystal, indicating superelasticity induced by modest stress due to the formation of photoproducts. This work provides not only a successful simulation of stepwise twisted actuation, but also to the best of our knowledge the first indication of superelasticity induced by light. Stimuli-responsive molecular organic crystals are of interest as actuating materials, but their mechanical responses are often poorly understood. Here, the authors study the photo-triggered phase transition of a chiral salicylideneamine crystal and uncover superelastic behaviour induced by light irradiation.
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DOI：
10.1073/pnas.2020604118
发表时间：
2021-02-02
影响因子：
11.1
作者：
Mahmoud Halabi J;Ahmed E;Sofela S;Naumov P
通讯作者：
Naumov P
影响因子：
3.4
作者：
Minaminosono A;Shigemune H;Okuno Y;Katsumata T;Hosoya N;Maeda S
通讯作者：
Maeda S
影响因子：
15
作者：
Morimoto, Masakazu;Irie, Masahiro
通讯作者：
Irie, Masahiro
DOI：
10.1016/s0045-7825(96)01232-7
发表时间：
1997-07-15
影响因子：
7.2
作者：
Auricchio, F;Taylor, RL;Lubliner, J
通讯作者：
Lubliner, J
影响因子：
15
作者：
Nath, Naba K.;Pejov, Ljupco;Naumov, Pance
通讯作者：
Naumov, Pance