Issue 4, 2021

Gas-propelled biosensors for quantitative analysis

Abstract

Gas-propelled biosensors display a simple gas-based signal amplification with quantitative detection features based on the target recognition event in combination with gas propulsion. Due to the liquid–gas conversion, the gas not only pushes the ink bar forward in the microchannel, but also serves as the power to propel the micromotors in the liquid. Thus, this continuous motion leads to a shift in distances which is associated with the target amount. Therefore, gas-propelled biosensors provide a visual quantification based on distance or speed signals without the need for expensive instruments. In this review, we focus on current developments in gas-propelled biosensors for quantitative analysis. First, we list the types of gas utilized as actuators in biosensors. Second, we review the representative gas-propelled biosensors, including the propulsion mechanisms and fabrication methods. Moreover, gas-propelled quantification based on distance and speed is summarized. Finally, we cover applications and provide a future perspective of gas-propelled biosensors.

Graphical abstract: Gas-propelled biosensors for quantitative analysis

Article information

Article type
Minireview
Submitted
30 Oct 2020
Accepted
23 Dec 2020
First published
23 Dec 2020

Analyst, 2021,146, 1115-1126

Gas-propelled biosensors for quantitative analysis

X. Liu, Y. Wang, Y. Gao and Y. Song, Analyst, 2021, 146, 1115 DOI: 10.1039/D0AN02154G

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