Performance of Composite Glass–Diarylethene Crystal Photomechanical Actuator Membranes

Dong, Xinning; Guo, Tianyi; Kitagawa, Daichi; Kobatake, Seiya; Palffy‐Muhoray, Peter; Bardeen, Christopher J.

doi:10.1021/acsami.2c04112

Cited by 7 publications

(1 citation statement)

References 54 publications

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“…As a new type of intelligent material, photochromic materials have been widely used in dyes, glasses, inks etc. [127][128][129][130][131][132][133][134][135][136][137][138][139][140][141] However, the exploration of photochromic materials should not be confined only to their color-changing properties, so in recent years, combining the photochromic phenomenon with other properties to explore new multifunctional materials has attracted a lot of attention.…”

Section: Applicationsmentioning

confidence: 99%

Recent progress in polyoxometalate–viologen photochromic hybrids: structural design, photochromic mechanism, and applications

Yang-Tao

Yang

et al. 2023

Inorg. Chem. Front.

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Section: Applicationsmentioning

confidence: 99%

Recent progress in polyoxometalate–viologen photochromic hybrids: structural design, photochromic mechanism, and applications

Yang-Tao

Yang

et al. 2023

Inorg. Chem. Front.

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Dynamic Optical Grating Based on a Photomechanical Molecular Crystal

Berges

Bekyarova

et al. 2023

Advanced Optical Materials

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Organic photomechanical crystals transform molecular‐scale photoisomerization events into largescale crystal shape changes. The results in this paper demonstrate that this photomechanical motion can be harnessed to reconfigure reflective elements on the crystal surface to actively control light propagation. This is accomplished by using a single organic photomechanical crystal composed of 1,2‐bis(2,4‐dimethyl‐5‐phenyl‐3‐thienyl)‐3,3,4,4,5,5‐hexafluoro‐1‐cyclopentene, which undergoes a reversible ring‐open to ring‐closed photoisomerization. Electron beam lithography patterning followed by a sublimation development step leaves periodically positioned, 120 nm deep grooves that are coated with gold metal to form a reflective grating on the crystal surface. Under UV irradiation, expansion of the bulk crystal increases the grating period by ≈5% and changes the diffraction angle of a 633 nm probe laser beam by 0.7° (first order) and 1.3° (second order). The grating period change can be reversed by visible light exposure and repeated for multiple cycles. The crystal expansion and thus the diffraction angle can also be continuously tuned by controlling the duration of light exposure. Anisotropic crystal expansion and contraction due to molecular photoisomerization enables low‐power light sources to steer light beams continuously over a range of diffraction angles.

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Hybrid Strategies for Enhancing the Multifunctionality of Smart Dynamic Molecular Crystal Materials

Qi,

Wu,

Zhu

et al. 2024

Chemistry A European J

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Dynamic molecular crystals are an emerging class of smart engineering materials that possess unique ability to convert external energy into mechanical motion. Moreover, they have being considered as strong candidates for dynamic elements in applications such as flexible electronic devices, artificial muscles, sensors, and soft robots. However, the inherent defects of molecular crystals like brittleness, short‐life and fatigue, have significantly impeded their practical applications. Inspired by the concept of "the whole is greater than the sum of its parts" in the field of biology, building stimuli‐response composites materials can be regarded as one of the ways to break through the current limitations of dynamic molecular crystals. Moreover, the hybrid materials can exhibit new functionalities that cannot be achieved by a single object. In this review, the focus was placed on the analysis and discussion of various hybrid strategies and options, as well as the functionalities of hybrid dynamic molecular crystal materials and the important practical applications of composite materials, with the introduction of photomechanical molecular crystals and flexible molecular crystals as a starting point. Moreover, the efficiency, limitations, and advantages of different hybrid methods were compared and discussed.

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Performance of Composite Glass–Diarylethene Crystal Photomechanical Actuator Membranes

Cited by 7 publications

References 54 publications

Recent progress in polyoxometalate–viologen photochromic hybrids: structural design, photochromic mechanism, and applications

Recent progress in polyoxometalate–viologen photochromic hybrids: structural design, photochromic mechanism, and applications

Dynamic Optical Grating Based on a Photomechanical Molecular Crystal

Hybrid Strategies for Enhancing the Multifunctionality of Smart Dynamic Molecular Crystal Materials

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