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Related Experiment Video

Updated: Feb 25, 2026

µTongue: A Microfluidics-Based Functional Imaging Platform for the Tongue In Vivo

µTongue: A Microfluidics-Based Functional Imaging Platform for the Tongue In Vivo

Published on: April 22, 2021

Functionalization-Free Microfluidic Electronic Tongue Based on a Single Response.

Flavio M Shimizu¹, Fagner R Todão², Angelo L Gobbi²

¹Instituto de Física de São Carlos, Universidade de São Paulo , São Carlos, São Paulo 13560-970, Brasil.

|July 29, 2017

Summary

This summary is machine-generated.

This study presents a novel microfluidic electronic tongue (e-tongue) that simplifies quality control. The new design eliminates recalibration needs and allows mass production, paving the way for widespread e-tongue adoption.

Keywords:

PCA PDMS impedance spectroscopy screening analyses thin films

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Area of Science:

Analytical Chemistry
Microfluidics
Sensor Technology

Background:

Electronic tongues (e-tongues) offer potential for quality control in diverse industries.
Current e-tongues face limitations including recalibration needs and complex surface modifications, hindering commercialization.

Purpose of the Study:

To introduce a microfluidic e-tongue that overcomes limitations of existing devices.
To develop a simplified, rapidly deployable, and mass-producible e-tongue system.

Main Methods:

A microfluidic chip was fabricated using polydimethylsiloxane (PDMS).
Five nonfunctionalized stainless steel microwires, coated with different metal/oxide films, were used as sensing units.
Global selectivity was achieved by recording a single equivalent admittance spectrum using impedance spectroscopy.

Main Results:

The e-tongue successfully classified basic tastes below human detection thresholds.
The system distinguished various chemicals relevant to the oil industry.
Cleanroom-free prototyping enabled mass production with easily replaceable and reproducible sensing units.

Conclusions:

The developed microfluidic e-tongue addresses key limitations of current systems, enhancing simplicity and speed.
The technology facilitates widespread dissemination of e-tongues for applications requiring fast and reproducible data acquisition.