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Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
Published on: November 7, 2016
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Highly sensitive, scalable reduced graphene oxide with palladium nano-composite as strain sensor
Suresh Nuthalapati1, Vijay Shirhatti1, Vaishakh Kedambaimoole1
1Dept. of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, Karnataka-560012, India.
Nanotechnology
|September 27, 2019
Summary
A new strain sensor using reduced graphene oxide (rGO) and palladium (Pd) nano-composite shows stable and linear responses. This novel sensor achieved an average gauge factor of 42.69 for strains up to 3000 microstrains.
Area of Science:
- Materials Science
- Nanotechnology
- Sensor Technology
Background:
- Graphene oxide (GO) and its reduced form (rGO) are promising materials for sensor applications due to their unique electrical properties.
- Developing robust and sensitive strain sensors is crucial for structural health monitoring and various engineering applications.
- Palladium (Pd) nano-composites can enhance the performance of graphene-based materials.
Purpose of the Study:
- To develop and characterize a novel strain sensor utilizing a reduced graphene oxide (rGO) and palladium (Pd) nano-composite.
- To evaluate the performance of the fabricated sensor under tensile strain.
- To assess the stability, linearity, and gauge factor of the rGO-Pd nano-composite strain sensor.
Main Methods:
- Graphene oxide (GO) was synthesized via a modified Hummer's method and subsequently reduced chemically to obtain rGO.
- A reduced graphene oxide (rGO) with palladium (Pd) nano-composite was prepared.
- The nano-composite was deposited onto a SS304 stainless-steel substrate using screen-printing.
- Characterization of the nano-composite was performed using Field Emission-Scanning Electron Microscope (FE-SEM), X-ray Diffraction (XRD), and Raman Spectroscopy.
- Tensile strain tests were conducted using a Micro-universal Test Machine to record resistance changes.
Main Results:
- The rGO-Pd nano-composite was successfully synthesized and characterized.
- The fabricated strain sensor demonstrated stable and linear responses to tensile strain.
- The sensor operated effectively within a strain range of 0-3000 microstrains.
- An average gauge factor of 42.69 was achieved in the tested strain range.
Conclusions:
- A novel and effective strain sensor based on a reduced graphene oxide (rGO) and palladium (Pd) nano-composite has been successfully developed.
- The screen-printed sensor exhibits excellent linearity and stability, making it suitable for practical strain sensing applications.
- The obtained gauge factor indicates significant potential for high-sensitivity strain detection.
