Broad‐Wavelength Light‐Driven High‐Speed Hybrid Crystal Actuators Actuated Inside Tissue‐Like Phantoms

Research on molecular crystals exhibiting light‐driven actuation has made remarkable progress through the development of various molecules and the identification of driving mechanisms. However, crystals developed to date have been driven mainly by ultraviolet (UV) or blue light irradiation, and driv...

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Bibliographic Details
Published in:Advanced functional materials 2023-11, Vol.33 (47), p.n/a
Main Authors: Kim, Dong Wook, Hagiwara, Yuki, Hasebe, Shodai, Dogan, Nihal Olcay, Zhang, Mingchao, Asahi, Toru, Koshima, Hideko, Sitti, Metin
Format: Article
Language:English
Subjects:
Actuation
Actuators
Anisole
Bending
Biocompatibility
broad‐wavelength
Crystals
Light
Light irradiation
Materials science
molecular crystals
MXene
Near infrared radiation
photothermal effect
Tissues
Titanium carbide
Ultraviolet radiation
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Summary:Research on molecular crystals exhibiting light‐driven actuation has made remarkable progress through the development of various molecules and the identification of driving mechanisms. However, crystals developed to date have been driven mainly by ultraviolet (UV) or blue light irradiation, and driving by red or near‐infrared (NIR) light has not been attempted yet. Herein, a broad‐wavelength light‐driven molecular crystals that exhibit high‐speed bending by photothermal effect is developed. Titanium carbide (Ti3C2Tx) MXene nanosheets are integrated into salicylideneaniline crystals to extend the wavelength range that causes photothermally driven bending to UV, visible, and NIR light. In addition, unlike the thin pristine molecular crystals that show slow photoisomerization‐induced bending only under UV light, the MXene layer enables the molecular crystals to be actuated rapidly regardless of their thickness over a wide range of wavelengths. The hybridization of molecular crystals with MXene, which exhibits strong biocompatibility as well as NIR light‐driven photothermal effect, allows for the bending of the hybrid crystals inside agar phantoms mimicking biological tissue. Last, it is confirmed that MXene hybridization can be extended to common molecular crystals including various salicylideneaniline and anisole derivatives. Through hybridization of organic molecular crystals with titanium carbide MXene nanosheets, broad‐wavelength light‐driven crystals exhibiting fast photothermally driven bending are developed. The incorporation of MXene nanosheets enables efficient photothermal heat generation within the hybrid crystals upon ultraviolet, visible, and near‐infrared light irradiation. This unique property allows the crystals to be actuated inside agar phantoms mimicking biological tissue.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202305916