Photostrictive actuators using piezoelectric materials

Kenji Uchino

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations


Photostrictive materials, exhibiting light-induced strains, are of interest for future generation wireless remote control photo-actuators, micro-actuators, and micro-sensor applications. The photostrictive effect arises from a superposition of the 'bulk' photovoltaic effect, i.e. generation of large voltage from the irradiation of light, and the converse piezoelectric effect, i.e. expansion or contraction under the voltage applied. (Pb,La)(Zr,Ti) O3 (PLZT) ceramics doped with WO3 exhibit large photostriction under uniform illumination of near-ultraviolet light. Using a bimorph configuration, a photo-driven relay and a micro walking device have been demonstrated. However, for the fabrication of these devices, higher response speed must be achieved. This chapter first reviews the theoretical background of the photostrictive effect, then discusses enhanced performance through composition modification and sample preparation techniques (thickness and surface characteristics of the sample). Future applications of photostrictive actuators are briefly described.

Original languageEnglish (US)
Title of host publicationAdvanced Piezoelectric Materials
Subtitle of host publicationScience and Technology
PublisherElsevier Inc.
Number of pages29
ISBN (Print)9781845695347
StatePublished - Sep 2010

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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