Development of sensor surface with recognition of molecular substructure

Kumi Masunaga, Shintaro Michiwaki, Ryosuke Izumi, Patrik Ivarsson, Fredrik Björefors, Ingmer Lundström, Kenshi Hayashi, Kiyoshi Toko

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A biological olfaction system is one of the highest performance chemical sensing systems for low-molecular-weight compounds. An ability of recognizing a various molecular properties based on their structures is essential for a biological odor recognition process. For the development of a sensor mimicking the olfactory system, we have formed benzene-patterned self-assembled monolayer (SAM) on the sensor surface using SAMs with nanostructure that serves as adsorption sites for benzene ring, which is representative substructure of aromatics. The structure of the benzene-patterned SAM surface was analyzed by contact-angle measurement, ellipsometry, cyclic voltammetry (CV) and atomic force microscopy (AFM). Moreover, the electrodes evaluated as sensor surfaces with cyclic surface-polarization impedance (cSPI) sensor that measures changes in impedance of the electrode surface by adsorption of substances. The results of cSPI indicated the benzene-patterned SAM surface could distinguish benzene by recognizing of the hydrophobicity and the molecular size.

Original languageEnglish
Pages (from-to)330-337
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume130
Issue number1
DOIs
Publication statusPublished - Mar 14 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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