Patterned colloid assembly by grafted photochromic polymer layers

Martin Piech, Matthew C. George, Nelson S. Bell, Paul V. Braun

Research output: Contribution to journalArticlepeer-review

Abstract

Quartz surfaces and colloidal silica particles were deri vatized with a poly (methyl methacrylate) copolymer containing spirobenzopyran (SP) photochromic molecules in the pendant groups at a concentration of 20 mol %. Two-photon near-IR excitation (∼780 nm) was then used to create chemically distinct patterns on the modified surfaces through a photochromic process of SP transformation to the zwitterionic merocyanine (MC) isomer. The derivatized colloids were approximately 10 times more likely to adsorb onto the photoswitched, MC regions. Surface coverage and adsorption kinetics have been compared to the mean-field model of irreversible monolayer adsorption.

Original languageEnglish (US)
Pages (from-to)1379-1382
Number of pages4
JournalLangmuir
Volume22
Issue number4
DOIs
StatePublished - Feb 14 2006

ASJC Scopus subject areas

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

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