Preparation of surface-tethered polymer layer on inorganic substrates by photoreactive self-assembled monolayer

Seong Ho Kim, Hanae Ohtsuka, Maria Celeste R Tria, Kuniaki Tanaka, Rigoberto C. Advincula, Hiroaki Usui

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A self-assembled monolayer (SAM) that has benzophenone (BP) terminal group was prepared on Si and indium-tin oxide (ITO) substrates, on which poly(9-vinyl carbazol) (PVK) was spin-coated and then irradiated with ultraviolet (UV) light. Upon UV irradiation, the BP unit reacted with the PVK backbone, yielding a crosslinked PVK layer that was covalently tethered to the substrate surface. Using this procedure, a patterned thin film of PVK was obtained by irradiating UV light through a photomask and then rinsing in chloroform. When polystylene (PSt) was spin-coated on the BP-SAM, only a thin interfacial layer was tethered by UV irradiation because PSt does not crosslink upon UV irradiation. The BP-SAM improved the adhesion strength between the PVK layer and ITO substrate without reducing the carrier injection from ITO to PVK. The photoreactive BP-SAM appeared to be an effective method to improve the interface between an inorganic electrode and a polymer layer deposited on its surface.

Original languageEnglish
Pages (from-to)78-83
Number of pages6
JournalThin Solid Films
Volume554
DOIs
Publication statusPublished - 2014 Mar 3
Externally publishedYes

Keywords

  • Benzophenone
  • Interface control
  • Patterning
  • Poly(9-vinylcarbazole)
  • Self-assembled monolayer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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