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Updated: Dec 7, 2025

Creating Rapid Oxygen Oscillations in Microbial Single-cell Growth Analysis using a Microfluidic Double-layer Device

Creating Rapid Oxygen Oscillations in Microbial Single-cell Growth Analysis using a Microfluidic Double-layer Device

Published on: July 18, 2025

Vegetable-Oil-Based Intelligent Ink for Oxygen Sensing.

Anastasiya Volison-Klimentiev¹, Lucas Cullari¹, Gal Shachar-Michaely¹

¹Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.

|September 30, 2020

Summary

This study introduces an oxygen-sensitive printable ink for food packaging. The ink

Keywords:

electrical conductivity food ink oil oxygen sensor

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Area of Science:

Materials Science
Food Science
Sensors

Background:

Food packaging integrity is crucial for maintaining food freshness and safety.
Current methods for monitoring oxygen exposure and package integrity can be limited.
Developing novel sensors for real-time assessment of food packaging conditions is needed.

Purpose of the Study:

To develop and evaluate an oil-based composite ink for monitoring oxygen exposure in food packaging.
To assess the potential of this ink as an indicator of package integrity and food freshness.
To demonstrate the tunability of the sensor's response time by altering the oil matrix.

Main Methods:

Fabrication of an oxygen-sensitive printable ink using silver microflakes in a vegetable oil matrix.
Measurement of the composite's electrical conductivity upon exposure to atmospheric oxygen.
Correlation of electrical conductivity changes with oxygen exposure time and oil type.

Main Results:

The oil-based composite exhibits a significant increase in electrical conductivity due to oxygen-induced polymerization and shrinkage of the oil matrix.
Using linseed oil, conductivity increased from 10^-11 to 10^-3 S/cm within 6 days of air exposure.
The response time of the sensor can be adjusted by selecting different types of vegetable oils.

Conclusions:

The developed oxygen-sensitive ink serves as a promising indicator for monitoring food package integrity and freshness.
The printable nature and tunable response time make it suitable for various food product shelf-life applications.
This technology offers a potential solution for enhanced food quality control and waste reduction.