Oxygen concentration control of dopamine-induced high uniformity surface coating chemistry

Hyo Won Kim, Bryan D. McCloskey, Tae Hwan Choi, Changho Lee, Min Joung Kim, Benny D. Freeman, Ho Bum Park

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155 Citations (Scopus)

Abstract

Material surface engineering has attracted great interest in important applications, including electronics, biomedicine, and membranes. More recently, dopamine has been widely exploited in solution-based chemistry to direct facile surface modification. However, unsolved questions remain about the chemical identity of the final products, their deposition kinetics and their binding mechanism. In particular, the dopamine oxidation reaction kinetics is a key to improving surface modification efficiency. Here, we demonstrate that high O 2 concentrations in the dopamine solution lead to highly homogeneous, thin layer deposition on any material surfaces via accelerated reaction kinetics, elucidated by Le Chatelier's principle toward dopamine oxidation steps in a Michael-addition reaction. As a result, highly uniform, ultra-smooth modified surfaces are achieved in much shorter deposition times. This finding provides new insights into the effect of reaction kinetics and molecular geometry on the uniformity of modifications for surface engineering techniques.

Original languageEnglish
Pages (from-to)233-238
Number of pages6
JournalACS Applied Materials and Interfaces
Volume5
Issue number2
DOIs
Publication statusPublished - 31 Dec 2012
Externally publishedYes

Keywords

  • anti-fouling
  • dopamine
  • homogeneous coating
  • membrane
  • surface modification

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