Surface characterization on binary nano/micro-domain composed of alkyl- and amino-terminated self-assembled monolayer

S. H. Lee, Takahiro Ishizaki, N. Saito, O. Takai

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The binary alkyl- and amino-terminated self-assembled monolayers (SAMs) composed of nano/micro-sized domains was prepared though a self-assembly technique. In addition, the wetting and electrostatic property of the binary SAMs was investigated by the analysis of the static and dynamic water contact angle and zeta-potentials measurement. The binary SAMs were also characterized by atomic force microscope (AFM), Kelvin probe force microscope (KPFM) and X-ray photoelectron spectroscopy (XPS). The domains on the binary SAMs were observed in topographic and surface potential images. The height of domain and the surface potential between octadecyltrichlorosilanes (OTS)-domain and n-(6-aminohexl)aminopropyl-trimethoxysilane (AHAPS)-SAM were about 1.1 nm and -30 mV. These differences of height and surface potential correspond to the ones between OTS and AHAPS. In XPS N 1s spectra, we confirmed the formation of binary SAMs by an amino peak observed at 399.15 eV. The dynamic and the static water contact angles indicated that the wetting property of the binary SAMs was depended on the OTS domain size. In addition, static water contact angles were measured under the conditions of different pH water and zeta-potential also indicated that the electrostatic property of the binary SAMs depended on OTS domain size. Thus, these results showed that the wetting and electrostatic property on the binary SAMs could be regulated by controlling the domain size.

Original languageEnglish
Pages (from-to)7453-7458
Number of pages6
JournalApplied Surface Science
Volume254
Issue number22
DOIs
Publication statusPublished - 2008 Sep 15
Externally publishedYes

Fingerprint

Self assembled monolayers
wetting
Surface potential
Contact angle
electrostatics
Wetting
Electrostatics
water
Water
Zeta potential
microscopes
photoelectron spectroscopy
Microscopes
X ray photoelectron spectroscopy
self assembly
x rays
Self assembly
probes
octadecyltrichlorosilane

Keywords

  • Binary self-assembled monolayer
  • Water contact angle
  • Wetting and electrostatic property
  • Zeta-potentials

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Surface characterization on binary nano/micro-domain composed of alkyl- and amino-terminated self-assembled monolayer. / Lee, S. H.; Ishizaki, Takahiro; Saito, N.; Takai, O.

In: Applied Surface Science, Vol. 254, No. 22, 15.09.2008, p. 7453-7458.

Research output: Contribution to journalArticle

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