Light-guided movement of a liquid droplet

S. K. Oh, M. Nakagawa, K. Ichimura

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


This report demonstrates a novel strategy for the light-guided motion of a liquid droplet on photoresponsive surfaces based on reversible changes in surface free energy induced by light. When a liquid droplet in a mm-scale was placed on a substrate surface modified with a calix[4]resorcinarene derivative having photochromic azobenzene units, photoirradiation caused a gradient in surface free energy due to the photoisomerization of surface azobenzenes, leading to directional motion of the liquid droplet. This motion is ascribed to a force imbalance between two opposite edges of the liquid droplet induced by light.

Original languageEnglish
Pages (from-to)311-316
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 2000
Externally publishedYes
Event3rd International Symposium on Organic Photochromism (ISOP99) - Fukuoka, Jpn
Duration: 1999 Nov 141999 Nov 18

ASJC Scopus subject areas

  • Condensed Matter Physics


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