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Related Experiment Video

Updated: Dec 24, 2025

Bacterial Detection & Identification Using Electrochemical Sensors

Bacterial Detection & Identification Using Electrochemical Sensors

Published on: April 23, 2013

Detecting live bacteria instantly utilizing AIE strategies.

Ting Ting Kong¹, Zheng Zhao, Ying Li

¹Center for BioDelivery Sciences, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China. tjin@sjtu.edu.cn.

Journal of Materials Chemistry. B

|April 8, 2020

Summary

Researchers developed novel biosensors that use fluorescent molecules to instantly detect live bacteria. These aggregation-induced emission (AIE) probes offer a promising new method for rapid bacterial identification.

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Area of Science:

Biotechnology
Analytical Chemistry
Microbiology

Background:

Rapid and accurate detection of live bacteria is crucial for public health and safety.
Existing methods for bacterial detection can be time-consuming or lack specificity.
Fluorescent biosensors offer potential for sensitive and rapid detection.

Purpose of the Study:

To develop and evaluate a new class of fluorescent biosensor molecules for instant detection of live bacteria.
To investigate the mechanism of aggregation-induced emission (AIE) in response to bacterial surfaces.
To differentiate between live and dead bacteria using rotation-restricted binding.

Main Methods:

Synthesis of tetraphenylethene (TPE)-cored boronic acid fluorogens.
Complexation of fluorogens with cis-diols on bacterial surfaces.
Utilizing aggregation-induced emission (AIE) for fluorescence detection.
Employing multi-boronate reagents for selective live bacteria detection.

Main Results:

A fluorogen with two boronic acid units selectively showed AIE with dead bacteria.
Reagents with three and four boronate units enabled instant detection of live bacteria by exhibiting AIE with both live and dead cells.
The developed biosensors demonstrated rapid and specific detection capabilities.

Conclusions:

The novel TPE-cored boronic acid biosensors provide a practical and instant method for live bacteria detection.
The AIE phenomenon offers a sensitive readout for bacterial presence.
This approach holds significant potential for applications in diagnostics and environmental monitoring.