A Flexible Multifunctional Sensor Based on an AgNW@ZnONR Composite Material.

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Flexible and transparent sensors are crucial for advanced electronic applications.
• Developing multifunctional sensors with high performance remains a challenge.

Purpose of the Study:

• To fabricate a cost-effective, multifunctional sensor with integrated UV photodetector and strain gauge capabilities.
• To investigate the performance and stability of the sensor under various conditions.

Main Methods:

• Synthesis of silver nanowires (AgNWs) via the polyol method.
• Fabrication of AgNW@ZnO nanorod (ZnONR) composite for multifunctional sensors using a hydrothermal method.
• Optimization of ZnO nanorod size and deposition parameters for enhanced flexibility and performance.

Main Results:

• The sensor achieved a high switching ratio of 1151 with fast response times (t_on: 2.7 s, t_off: 2.3 s) at 2000 μW/cm² UV power density.
• Linear correlation observed between UV power density and maximum optical current.
• Sensor performance showed a 164.3% increase in response current with bending from 15° to 90°.
• Demonstrated excellent stability and repeatability with no degradation after 10,000 bending cycles.

Conclusions:

• The multifunctional AgNW@ZnONR sensor exhibits promising potential for wearable electronic applications.
• The cost-effective fabrication method and robust performance make it suitable for practical use.
• The sensor's dual functionality (UV detection and strain sensing) opens new avenues for flexible electronics.