AI Article Synopsis
- Soft materials that can respond to light are being explored for creating human-friendly actuators, but their motion has been limited to two dimensions due to how light interacts with these materials.* -
- This study introduces a new type of liquid-crystalline polymer films that deform through a process called two-photon absorption, which uses focused laser pulses for stimulation.* -
- The unique ability to control the bending and twisting of these films through precise laser targeting allows for a wide range of complex, three-dimensional movements, making them highly valuable for microactuator applications.*
Article Abstract
Soft materials that respond to external stimuli are promising candidates for next-generation actuators with human-friendly nature. Among various stimuli to induce strain, light offers spatial selectivity, which allows versatile motion of a continuous body. However, spatial selectivity of photoactuation has been limited in two dimension due to the predominant absorption of photons by chromophores near a light source in accordance with Beer-Lambert law. Here, we report the deformation of crosslinked liquid-crystalline polymer films triggered by two-photon absorption. The films containing azotolane moieties show photoinduced deformation upon irradiation with fs laser pulses through two-photon absorption. The direction of photoinduced bending is controlled by depth-selective excitation with a focused laser beam. Furthermore, the mode of deformation is transformed from bending to twisting by irradiating spots near an edge of the film. Inhomogeneous photoirradiation with high spatial selectivity allows an infinite variation of three-dimensional motions even apart from preprogrammed behavior, which would be advantageous especially in application to microactuators.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11544012 | PMC |
| http://dx.doi.org/10.1038/s41467-024-53682-8 | DOI Listing |
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