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Updated: Jun 20, 2026

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells

Published on: October 15, 2013

Targeted cell detection based on microchannel gating.

Mehdi Javanmard¹, Amirali H Talasaz, Mohsen Nemat-Gorgani

¹Electrical Engineering Department, Stanford University, Stanford, California 94305, USA and Stanford Genome Technology Center, Palo Alto, California 94304, USA.

Biomicrofluidics

|August 21, 2009

Summary

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This study presents a rapid, inexpensive sensor for real-time, label-free electrical detection of single bacterial cells. The microelectrode-based device offers a faster alternative to traditional microbiological methods.

Area of Science:

Biotechnology
Biosensor Technology
Microfluidics

Background:

Traditional pathogen detection methods (culture enrichment, plating) are time-consuming and expensive.
There is a need for rapid, cost-effective, and sensitive pathogen detection techniques.

Purpose of the Study:

To design, fabricate, and test a novel microelectrode-based sensor for real-time, label-free electrical detection of single bacterial cells.
To demonstrate the sensor's capability for rapid and selective pathogen identification.

Main Methods:

Fabrication of a microchannel device integrated with microelectrodes.
Electrical detection of single yeast cells by measuring instantaneous changes in ionic impedance.
Testing sensor selectivity against target and non-target cells.

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Last Updated: Jun 20, 2026

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells

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Main Results:

Successful real-time detection of target yeast cells was achieved.
The sensor demonstrated high selectivity, responding to target cells while ignoring non-target cells.
The technique allows for label-free, electrical detection of individual cells.

Conclusions:

The developed microelectrode sensor offers a rapid and inexpensive solution for single bacterial cell detection.
This technology has the potential for multiplexing on a chip to analyze complex microbial mixtures.
It presents a significant advancement over conventional microbiological detection methods.