Crystal actuator based on a thermal phase transition and photothermal effect

Hagiwara, Yuki; Taniguchi, Takuya; Asahi, Toru; Koshima, Hideko

doi:10.1039/d0tc00007h

Cited by 36 publications

(65 citation statements)

References 46 publications

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“…Recently, Koshima and co‐workers reported a long rod‐like salicylideneanilines crystal bending under UV/visible light irradiation due to the photothermal effect, which induced the temperature rise of the crystal and resulted in the local elongation near the crystal surface with slight bending owing to the temperature difference in the thickness direction (Figure 5C). [ 129 ]…”

Section: Energy Conversion In Scsc Phase Transition Materialsmentioning

confidence: 99%

Energy Conversion in Single‐Crystal‐to‐Single‐Crystal Phase Transition Materials

Zheng

Jia

et al. 2021

Advanced Energy Materials

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Single‐crystal‐to‐single‐crystal (SCSC) phase transitions are direct structural evolutions of crystalline materials in the solid state without the damage of ordering in the crystal lattice. These multidimensional SCSC phase transition materials are responsive to multiple external stimuli (heat, light, mechanical force, electricity, etc.), and have therefore demonstrated promising applications in many fields such as sensors, actuators, artificial muscles, soft robotics, and energy harvesting. The directionality and cooperativity of intermolecular interactions in crystal structures together with a sustained and long‐range dynamics, and the fact that they can operate at high frequency, enable fast and efficient energy conversion processes in SCSC phase transition materials. In this review, the SCSC phase transition materials are analyzed by dividing them into different types of energy transformation, from the point of view of different stimuli that initiate and drive the phase transition, including the thermo‐, photo‐, electric‐, and mechanic‐induced energy transformation, and the dimensionality dependent characteristics in these processes are presented. Moreover, the state‐of‐the‐art design and fabrication of the SCSC phase transition materials as well as the mechanisms of their energy conversion processes are discussed. Finally, the challenges and future potentials are also discussed.

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Section: Energy Conversion In Scsc Phase Transition Materialsmentioning

confidence: 99%

Energy Conversion in Single‐Crystal‐to‐Single‐Crystal Phase Transition Materials

Zheng

Jia

et al. 2021

Advanced Energy Materials

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“…[1][2][3] Light can easily and remotely supply energy regardless of any amount. From such a point of view, representative photochromic molecules reacting even in the crystalline phase have been reported so far, such as diarylethene, [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] azobenzene, [21][22][23][24][25] salicylideneaniline, 26,27 furylfulgide, 28 anthracene 2,29-32 and naphthalene diimides. 33 In particular, the diarylethene crystals have the only photochromic properties such as excellent thermal stability, fast responsible time and high photoreversibility.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic bending and twisting behaviour of a twin crystal composed of a diarylethene

2021

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“…Contrary to their appearance as hard and fragile objects, molecular crystals are attractive as materials that are mechanically responsive to external stimuli. Although the history of research on mechanical molecular crystals is as short as 10 years, many mechanical crystals have been developed that show bending ( Kobatake et al, 2007 ; Koshima et al, 2009 ; Terao et al, 2012 ), twisting ( Kitagawa et al, 2013 ; Taniguchi et al, 2016 ; Kitagawa et al, 2018 ), rotation ( Zhu et al, 2016 ), jumping ( Naumov et al, 2013 ), locomotion ( Taniguchi et al, 2018 ), and high-frequency bending ( Hagiwara et al, 2020 ). In terms of mechanical properties, crystals have the advantage of a larger Young’s modulus ( Taniguchi et al, 2019 ) than polymers and gels as well as a faster response to external stimuli ( Naumov et al, 2020 ); this has motivated the development of crystal soft robots composed of mechanically responsive crystals.…”

Section: Introductionmentioning

confidence: 99%

Light-Driven Crystal–Polymer Hybrid Actuators

et al. 2021

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Recently, soft robots, which are made of soft and light organic materials, have attracted much attention because of improved safety for daily interactions with humans. Mechanically responsive materials that can move macroscopically by external stimuli, such as light and heat, have been studied extensively over the past two decades, and they are expected to be applicable to soft robots. Among them, mechanically responsive crystals are attractive in terms of a larger Young’s modulus and faster response speed compared with polymers and gels. However, it is impractical to use one piece of a single crystal as a crystal machine; it is difficult to control the size of crystals and obtain large crystals. Hybridization of crystals with polymers is one way to create actuators with more realistic movements. Herein, we report a hybrid crystal assembly in which plate-like salicylideneaniline crystals are aligned in polymer films by a “rubbing” technique, a new approach which is inexpensive, easy, and applicable to a wide range of crystals and polymers. The hybrid films bent reversibly upon alternate irradiation with ultraviolet and visible light. The hybrid films bent as fast as single crystals, even when larger than single-crystal size, showing great mechanical performance originating from the advantages of both molecular crystals (fast response time) and polymers (large size). This work enriches the development of light-driven hybrid actuators composed of molecular crystals and polymers.

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Crystal actuator based on a thermal phase transition and photothermal effect

Abstract: High frequency mechanical bending of the crystal was achieved based on the photothermal effect upon light irradiation.

Cited by 36 publications

References 46 publications

Energy Conversion in Single‐Crystal‐to‐Single‐Crystal Phase Transition Materials

Energy Conversion in Single‐Crystal‐to‐Single‐Crystal Phase Transition Materials

Anisotropic bending and twisting behaviour of a twin crystal composed of a diarylethene

Light-Driven Crystal–Polymer Hybrid Actuators

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