| Oct 05, 2023 |
Laser-scribed graphene for sensors
(Nanowerk News) Graphene-based sensors have shown great promise due to graphene's excellent electrical and physical properties. However, scalable production of high-quality graphene remains challenging. In a review published in Light: Advanced Manufacturing ("Laser-scribed graphene for sensors: preparation, modification, applications, and future prospects"), researchers led by Dr. Zhengfen Wang and Prof. Xi Chen from the University of Shanghai for Science and Technology highlight laser-scribed graphene (LSG) as an efficient technique for fabricating graphene-based sensors.
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LSG is produced by laser irradiation of carbon precursors like graphene oxide or polyimide films. This direct writing approach enables rapid, localized graphene patterning without masks or chemicals. The entire process takes just minutes. LSG exhibits high surface area, stability, and conductivity, making it attractive for sensors.
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| Laser-scribed graphene for sensors. (© Light: Advanced Manufacturing)
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The researchers discuss LSG preparation and modification using different laser sources, atmospheres, and dopants. Unlike conventional graphene synthesis methods, laser scribing is fast, scalable, and eco-friendly. The tunable properties and simple fabrication of LSG show great potential for customizable sensor design.
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The review covers applications in stress, bio, gas, temperature, and humidity sensing. Optimization of laser parameters and graphene doping allow tuning sensor performance. Multifunctional LSG sensors are also highlighted, where careful patterning minimizes signal crosstalk. Flexible LSG devices further enable wearable sensor development.
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Overall, LSG provides a facile new route for producing graphene-based sensors with excellent performance. The combination of tunable properties and scalable direct writing offers unique advantages over conventional graphene synthesis techniques. This review demonstrates the versatility and promise of LSG for advanced sensor fabrication.
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