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Reference type: Journal
Authors: Masunaga K, Michiwaki S, Izumi R, Ivarsson P, Björefors F, Lundström I, Hayashi K, Toko K
Article Title: Development of sensor surface with recognition of molecular substructure.
Publication date: 2008
Journal: Sensors and Actuators B: Chemical
Volume: 130
Issue: (1)
Page numbers: 330-337.
DOI: 10.1016/j.snb.2007.08.027
Alternative URL: http://www.sciencedirect.com/science/article/B6THH-4PG870C-4/2/90cefcafa6139529d71a7c9fc4ea0124

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
Author keywords: biomimetic sensor, Olfactory system, Nanostructure, Aromatics detection, Benzene, Self-assembled monolayers (SAMs), Cyclic surface-polarization impedance (cSPI) spectroscopy, Constant phase element (CPE)

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