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Proceedings Paper

Motion of matter induced by light fueled molecular machines
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Paper Abstract

Materials which can be actuated by light have potential to lead to light fueled robots and machines. Such materials deform and move by the action of photo-active molecules; e.g. molecular machines. Azobenzene derivatives are such a molecules, and they undergo a high rate of light-induced cyclic molecular shape change from an elongated, trans form, to a more globular, cis form; a feature which imparts macroscopic motion into materials in the presence of intensity gradients. That is photoisomerization leads to matter motion in inhomogeneous irradiation light fields. In viscoelastic materials, matter motion, in concept, is due to competing forces, including viscous and photoisomerization forces, and possible radiation pressure and elastic forces, as well as random forces due to thermal fluctuations. In solid films of azopolymers, the photoisomerization force overcomes other forces due to softening and decrease of viscosity of the material by photoisomerization. In this paper, we give a brief overview of the theoretical concept of matter motion induced by photoisomerization; e.g. photochemical tweezing, and we show that light absorption provides the energy needed by the system for isomerization and matter motion.

Paper Details

Date Published: 14 September 2018
PDF: 5 pages
Proc. SPIE 10740, Molecular Machines, 1074007 (14 September 2018); doi: 10.1117/12.2319307
Show Author Affiliations
Sanaa Elhani, Mohammed Univ. V (Morocco)
Moroccan Foundation for Advanced Science, Innovation and Research (Morocco)
Zouheir Sekkat, Mohammed Univ. V (Morocco)
Moroccan Foundation for Advanced Science, Innovation and Research (Morocco)
Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 10740:
Molecular Machines
Zouheir Sekkat, Editor(s)

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