Light-driven actuators convert optical energy into physical motion. Organic materials, commonly used in light-driven actuators thus far, suffer from two limitations: slow repetitive operation and the requirement of two different light sources. Herein, we report a high-speed, light-driven actuator that can be operated by a single light source with low-energy density. We achieved this breakthrough by utilizing a freestanding epitaxial sheet of ferroelectric BaTiO. One repetitive operation takes only 120 μs, which is 10 times faster than that of organic-based counterparts. The high-speed operation is derived from the light-induced nonthermal deformation provided by the excellent ferroelectricity (remnant polarization of 23 μC/cm) and piezoelectricity ( of 600 pm/V) of the sheet. The displacement-to-length ratio is achieved to be 3.7% with a relatively low laser power density (10200 mW/cm) compared to previously reports (15010 mW/cm). Furthermore, the actuator was operable even in water, demonstrating its potential in various applications.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1021/acsami.4c10044 | DOI Listing |
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!