Reversible pattern formation through photolysis

Timothy R. Kline, Ayusman Sen

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We report a photolytic method to induce spatial and temporal patterning/deposition of particles at the micron scale on a time scale of seconds. Reversible pattern formation by negatively charged particles occur around micron-sized silver features on different substrates when exposed to UV light in the presence of aqueous hydrogen peroxide. Diffusiophoretic motion due to a spatially defined ion gradient accounts for our observations. Atomic force and optical microscopy, as well as conductivity measurements, support this hypothesis.

Original languageEnglish (US)
Pages (from-to)7124-7127
Number of pages4
JournalLangmuir
Volume22
Issue number17
DOIs
StatePublished - Aug 15 2006

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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