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Hair-Like Flexible Airflow Sensor for Large-Area Airflow Sensing.

Yingxi Xie¹, Feilong Liu¹, Yongchao Luo²

¹School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, 510641, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|September 9, 2025

Summary

A novel hair-like flexible airflow sensor was developed using laser direct writing and electrostatic flocking. This sensor offers high sensitivity and fast response for large-area airflow monitoring in various applications.

Keywords:

fast response time flexible airflow sensors hair‐like structures large‐area airflow sensing wide detection range

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Area of Science:

Materials Science
Sensor Technology
Nanotechnology

Background:

Flexible airflow sensors are crucial for various applications but developing high-performance, large-area sensors remains challenging.
Existing sensors often face limitations in sensitivity, response time, and adaptability to different surfaces.

Purpose of the Study:

To propose an efficient technology for airflow sensing using a hair-like flexible sensor.
To develop a high-performance flexible airflow sensor capable of large-area coverage and conformal monitoring.

Main Methods:

Fabrication of a hair-like flexible airflow sensor utilizing laser direct writing and electrostatic flocking techniques.
Characterization of sensor performance, including sensitivity, response time, and detection range.

Main Results:

The sensor demonstrated high sensitivity (5.25% s m^-1) and a fast response time (39.83 ms).
Achieved a wide detection range (3.48 - 18.36 m s^-1) with minimal airflow field disturbance.
Exhibited excellent flexibility and conformal monitoring capabilities on diverse surfaces.

Conclusions:

The developed hair-like flexible airflow sensor offers an efficient, cost-effective solution for airflow sensing.
Its design facilitates integration into arrays for large-area deployment, enabling comprehensive airflow monitoring.
Potential applications include environmental monitoring, robotics, wearable electronics, and tactile sensing.