Ultra micro biosensors using platinized carbon fiber electrode integrated counter electrode

Eiichi Tamiya*, Yoko Sugiura, Akitane Akiyama, Masayasu Suzuki, Isao Karube

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An integrated ultra micro biosensor was constructed with a platinized carbon fiber disk (PCD) electrode with a 7-μm diameter and a platinum thin film (PTF) counterelectrode fabricated on the glass capillary tube. By platinization, the electrode activity of the carbon fiber was greatly improved. In order to obtain stable response, pulse potential was applied to hydrogen peroxide measurement. The PTF counterelectrode showed good stability and could be used as a substitute for the silver-silver chloride electrode. Since the integrated PCD electrode showed good characteristics as a hydrogen peroxide sensor, glutamate oxidase was immobilized onto the tip of the PCD electrode and an ultra micro glutamate sensor was constructed. The sensor showed stable response to glutamate, and the response time was within 12 s. The calibration range for glutamate measurement was 50 to 800 μM.

Original languageEnglish
Title of host publicationTransducers '91
PublisherPubl by IEEE
Pages381-384
Number of pages4
ISBN (Print)0879425857
StatePublished - 1991
Event1991 International Conference on Solid-State Sensors and Actuators - San Francisco, CA, USA
Duration: 1991/06/241991/06/28

Publication series

NameTransducers '91

Conference

Conference1991 International Conference on Solid-State Sensors and Actuators
CitySan Francisco, CA, USA
Period1991/06/241991/06/28

ASJC Scopus subject areas

  • General Engineering

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