Photochemical Grafting and Patterning of Organic Monolayers on Indium Tin Oxide Substrates

Y. Li, H. Zuilhof

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)

Abstract

Covalently attached organic layers on indium tin oxide (ITO) surfaces were prepared by the photochemical grafting with 1-alkenes. The surface modification was monitored with static water contact angle, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) measurements. Hydrophobic methyl-terminated ITO surfaces can be obtained via the grafting of tetradec-1-ene, whereas the attachment of ¿-functionalized 1-alkenes leads to functionalized ITO surfaces. The use of a C=C—Ge(CH3)3 terminus allows for facile tagging of the surface with an azido group via a one-pot deprotection/click reaction, resulting in bio/electronically active interfaces. The combination of nonaggressive chemicals (alkenes), mild reaction conditions (room temperature), and a light-induced grafting that facilitates the direct patterning of organic layers makes this simple approach highly promising for the development of ITO-based (bio)electronic devices.
Original languageEnglish
Pages (from-to)5350-5359
JournalLangmuir
Volume28
Issue number12
DOIs
Publication statusPublished - 2012

Keywords

  • self-assembled monolayers
  • click chemistry
  • terminated monolayers
  • surface modification
  • biomolecular interfaces
  • aqueous-solutions
  • molecular layers
  • silicon
  • functionalization
  • attachment

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