Light-Controlled Rotational Speed of an Acoustically Levitating Photomobile Polymer Film.

Autor: Lucchetta DE; Dipartimento SIMAU, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.; Optoacoustic Lab, Dipartimento SIMAU, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Castellini P; Dipartimento DIISM, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Martarelli M; Dipartimento DIISM, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Scalise L; Dipartimento DIISM, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Pandarese G; Dipartimento DIISM, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Riminesi C; CNR, Institute of Heritage Science, Via Madonna del Piano, 10, 50019 Sesto Fiorentino, Italy., Singh G; Department of Applied Physics, Amity Institute of Applied Sciences, Amity University, Noida 201313, Uttar Pradesh, India., Di Donato A; Dipartimento DII, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Francescangeli O; Dipartimento SIMAU, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy., Castagna R; CNR, Institute of Heritage Science, Via Madonna del Piano, 10, 50019 Sesto Fiorentino, Italy.; URT-CNR@UNICAM, Photonic Materials Laboratory, Consiglio Nazionale delle Ricerche (CNR), c/o Università di Camerino (UNICAM), Polo di Chimica, Via Sant'Agostino, 1, 62032 Camerino, Italy.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2023 Jan 06; Vol. 16 (2). Date of Electronic Publication: 2023 Jan 06.
DOI: 10.3390/ma16020553
Abstrakt: In this work, we study the light-induced changes of the rotational speed of a thin photomobile film using a single-axis acoustic levitator operating at 40 kHz. In our experiments, a 50 μm thick photomobile polymer film (PMP) is placed in one of the nodes of a stationary acoustic field. Under the action of the field, the film remains suspended in air. By externally perturbing this stable equilibrium condition, the film begins to rotate with its natural frequency. The rotations are detected in real time by monitoring the light of a low power He-Ne laser impinging on and reflected by the film itself. During the rotational motion, an external laser source is used to illuminate the PMP film; as a consequence, the film bends and the rotational speed changes by about 20 Hz. This kind of contactless long-distance interaction is an ideal platform for the development and study of many electro-optics devices in microgravity and low-friction conditions. In particular, we believe that this technology could find applications in research fields such as 3D dynamic displays and aerospace applications.
Databáze: MEDLINE
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