2026-10-12T21:18:30Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33942908 2026-09-19T15:18:24Z category_1 category_915 category_14 category_16 category_21 category_39 category_46 category_734 category_106 portal_63 item_type_2 month_year_09_2026

Light-Responsive Cu–BFO/PVDF-HFP Bilayer Films for Micromanipulation and Soft Robotic Applications Thanapon Muenwacha (18979019) Nirawit Kunanta (25076306) Natthapon Sripallawit (18979013) Ishmah Luthfiyah (25076309) Worawat Meevasana (11166543) Biophysics Physical Sciences not elsewhere classified Molecular Biology Physiology Biotechnology Ecology Immunology Biological Sciences not elsewhere classified Science Policy vinylidene fluoride -< thin film onto strict wavelength selectivity severe performance divergence fixed thermal threshold doped bismuth ferrite cu – bfo converse piezoelectric effect controlled microgripper capable baseline thermal responses soft robotic applications significant response occurring hfp bilayer films highly efficient light haptic applications dominated response weight ratio strongly supports practical potential photothermal expansion kinetic decoupling isothermal analysis flexible poly co </ actuator triggers >- hexafluoropropylene 9 mg 3 ° A light-driven heterostructure was developed by depositing a Copper-doped Bismuth Ferrite (Cu–BFO) thin film onto a flexible poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) (PVDF-HFP) substrate. Unlike conventional photoactuators governed primarily by photothermal expansion, this bimorph demonstrates a fully reversible bending consistent with a photostriction-dominated response. Kinetic decoupling and isothermal analysis at a fixed thermal threshold of 35 °C explicitly reveal a severe performance divergence: under 405 nm violet illumination, the actuator triggers an instantaneous mechanical deflection reaching an average maximum bending angle of 79.9° ± 0.7°, whereas 532 nm green and 635 nm red light yield near-zero, baseline thermal responses (2.8° ± 0.3° and 5.7° ± 0.9°, respectively). This strict wavelength selectivity, with significant response occurring only above the Cu–BFO bandgap, strongly supports the actuation predominantly photostrictive mechanism. The resulting internal electric field induces lattice strain through the converse piezoelectric effect, providing a highly efficient light-to-mechanical energy conversion pathway. Finally, a light-controlled microgripper capable of lifting objects weighing 1.9 mg with a payload-to-weight ratio of 1.58, demonstrates the practical potential of this heterostructure for remotely powered soft robotic and haptic applications. 2026-09-19T00:00:00Z Dataset Media 10.1021/acsapm.6c03080.s001 https://figshare.com/articles/media/Light-Responsive_Cu_BFO_PVDF-HFP_Bilayer_Films_for_Micromanipulation_and_Soft_Robotic_Applications/33942908 CC BY-NC 4.0