Optimization of electric field frequency on dielectrophoretic impedance measurement method for oral bacteria detection

Ryo Hamada, Junya Suehiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A simple and rapid bacteria detection device for on-site evaluation of oral hygiene in hospitals and clinics was demonstrated. The developed device utilizes dielectrophoretic impedance measurement (DEPIM) method. We integrated a micro electrode chip on which bacteria were captured by dielectrophoresis (DEP), an AC voltage source to induce DEP force, and an impedance measurement circuit to a portable instrument that enables rapid and automated oral bacterial inspection in hospitals and clinics. Special considerations have been made on effects of high electrical conductivity of oral samples on DEP force and DEPIM results. It was shown experimentally and theoretically that using a higher electric field frequency for the DEP bacteria trap and the impedance measurement could realize DEPIM application to bacteria inspection from oral samples with higher conductivity. Based on these investigations, we optimized the frequency condition of the DEPIM suitable for inspecting an oral sample along with the design and development of a portable DEPIM apparatus for on-site inspection of oral bacteria.

Original languageEnglish
Title of host publicationBIODEVICES 2011 - Proceedings of the International Conference on Biomedical Electronics and Devices
Pages125-129
Number of pages5
Publication statusPublished - Jul 15 2011
EventInternational Conference on Biomedical Electronics and Devices, BIODEVICES 2011 - Rome, Italy
Duration: Jan 26 2011Jan 29 2011

Publication series

NameBIODEVICES 2011 - Proceedings of the International Conference on Biomedical Electronics and Devices

Other

OtherInternational Conference on Biomedical Electronics and Devices, BIODEVICES 2011
CountryItaly
CityRome
Period1/26/111/29/11

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

Fingerprint Dive into the research topics of 'Optimization of electric field frequency on dielectrophoretic impedance measurement method for oral bacteria detection'. Together they form a unique fingerprint.

  • Cite this

    Hamada, R., & Suehiro, J. (2011). Optimization of electric field frequency on dielectrophoretic impedance measurement method for oral bacteria detection. In BIODEVICES 2011 - Proceedings of the International Conference on Biomedical Electronics and Devices (pp. 125-129). (BIODEVICES 2011 - Proceedings of the International Conference on Biomedical Electronics and Devices).