A portable and multiplexed bioelectronic sensor using human olfactory and taste receptors

Area of Science:

• Biotechnology
• Sensor Technology
• Food Science

Background:

• Current methods for detecting food contamination are often time-consuming and require laboratory settings.
• There is a need for rapid, on-site detection methods to ensure food safety and quality.

Purpose of the Study:

• To develop a multiplexed bioelectronic sensor for simultaneous detection of food contamination indicators.
• To create a portable device that mimics human olfactory and taste systems for on-site food freshness monitoring.

Main Methods:

• Engineered olfactory and taste receptors in Escherichia coli.
• Immobilized reconstituted receptors onto a multi-channel carbon nanotube field-effect transistor (CNTFET).
• Measured conductance changes in response to odor and taste molecules.

Main Results:

• The bioelectronic sensor demonstrated high sensitivity and selectivity for detecting various odorants and tastants.
• The device successfully mimicked human sensory systems, enabling pattern recognition of different molecules.
• Simultaneous electrical signal measurement was achieved with a customized platform.

Conclusions:

• The developed multiplexed bioelectronic sensor offers a rapid and on-site solution for food freshness monitoring.
• This technology has potential for broad applications as a portable sensing platform.