Rapid on-chip lysis and ultrasensitive electrochemical detection of bacteria

J. D. Besant*, J. Das, E. H. Sargent, S. O. Kelley

*Corresponding author for this work

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

Abstract

Rapid detection of low concentrations of bacterial mRNA using on-chip sensors is challenging as mRNA molecules accumulate slowly at the sensor. We overcome this barrier using a novel device capable of bacterial lysis and detection of released mRNA. The chip is patterned with an array of wells each of which contains electrical lysis electrodes situated 50 microns from an electrochemical nucleic acid sensor. Lysing releases the intracellular mRNA which quickly diffuses to the nearby in-well sensor. We demonstrate rapid and sensitive detection of mRNA from E. coli within 30 minutes.

Original languageEnglish (US)
Title of host publication18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
PublisherChemical and Biological Microsystems Society
Pages230-232
Number of pages3
ISBN (Electronic)9780979806476
StatePublished - 2014
Event18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 - San Antonio, United States
Duration: Oct 26 2014Oct 30 2014

Publication series

Name18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014

Conference

Conference18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
Country/TerritoryUnited States
CitySan Antonio
Period10/26/1410/30/14

Keywords

  • Bacterial detection
  • Cell lysis
  • Electrochemical sensors
  • Microelectrodes

ASJC Scopus subject areas

  • Control and Systems Engineering

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