Facile synthesis of laser-induced graphene oxide and its humidity sensing properties

In this study, laser-induced graphene oxide (LIGO) was synthesized through a facile liquid-based process involving the introduction of deionized (DI) water onto polyimide (PI) film and subsequent direct laser irradiation using a CO 2 laser (λ = 10.6 μm). The synthesized LIGO was then evaluated as a...

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Veröffentlicht in:Carbon Letters 2024-05, Vol.34 (4), p.1173-1185
Hauptverfasser: An, Jin Woo, Hyeong, Seok-Ki, Kim, Kang Min, Lee, Hee Ra, Park, Ji-won, Kim, Tae-Wook, Bae, Sukang, Lee, Seoung-Ki
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container_end_page 1185
container_issue 4
container_start_page 1173
container_title Carbon Letters
container_volume 34
creator An, Jin Woo
Hyeong, Seok-Ki
Kim, Kang Min
Lee, Hee Ra
Park, Ji-won
Kim, Tae-Wook
Bae, Sukang
Lee, Seoung-Ki
description In this study, laser-induced graphene oxide (LIGO) was synthesized through a facile liquid-based process involving the introduction of deionized (DI) water onto polyimide (PI) film and subsequent direct laser irradiation using a CO 2 laser (λ = 10.6 μm). The synthesized LIGO was then evaluated as a sensing material for monitoring changes in humidity levels. The synthesis conditions were optimized by precisely controlling the laser scribing speed, leading to the synthesis of LIGO with different structural characteristics and varying oxygen contents. The increased number of oxygen-containing functional groups contributed to the hydrophilic properties of LIGO, resulting in a superior humidity sensing capabilities compared with laser-induced graphene (LIG). The LIGO-based sensors outperformed LIG-based sensors, demonstrating approximately tenfold higher sensing responsivity when detecting changes at each humidity level, along with 1.25 to 1.75 times faster response/recovery times, making LIGO-based sensors more promising for humidity-monitoring applications. This study demonstrated laser ablation in a renewable and natural precursor as an eco-friendly and energy-efficient approach to directly synthesize LIGO with controllable oxidation levels. Graphical abstract
doi_str_mv 10.1007/s42823-023-00672-3
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The synthesized LIGO was then evaluated as a sensing material for monitoring changes in humidity levels. The synthesis conditions were optimized by precisely controlling the laser scribing speed, leading to the synthesis of LIGO with different structural characteristics and varying oxygen contents. The increased number of oxygen-containing functional groups contributed to the hydrophilic properties of LIGO, resulting in a superior humidity sensing capabilities compared with laser-induced graphene (LIG). The LIGO-based sensors outperformed LIG-based sensors, demonstrating approximately tenfold higher sensing responsivity when detecting changes at each humidity level, along with 1.25 to 1.75 times faster response/recovery times, making LIGO-based sensors more promising for humidity-monitoring applications. This study demonstrated laser ablation in a renewable and natural precursor as an eco-friendly and energy-efficient approach to directly synthesize LIGO with controllable oxidation levels. 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The synthesized LIGO was then evaluated as a sensing material for monitoring changes in humidity levels. The synthesis conditions were optimized by precisely controlling the laser scribing speed, leading to the synthesis of LIGO with different structural characteristics and varying oxygen contents. The increased number of oxygen-containing functional groups contributed to the hydrophilic properties of LIGO, resulting in a superior humidity sensing capabilities compared with laser-induced graphene (LIG). The LIGO-based sensors outperformed LIG-based sensors, demonstrating approximately tenfold higher sensing responsivity when detecting changes at each humidity level, along with 1.25 to 1.75 times faster response/recovery times, making LIGO-based sensors more promising for humidity-monitoring applications. 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subjects Ablation
Carbon dioxide
Carbon dioxide lasers
Change detection
Characterization and Evaluation of Materials
Chemistry and Materials Science
Controllability
Deionization
Energy efficiency
Functional groups
Graphene
Humidity
Irradiation
Laser ablation
Laser radiation
Lasers
Materials Engineering
Materials Science
Monitoring
Nanotechnology
Original Article
Oxidation
Oxygen
Sensors
Spectrum analysis
Synthesis
title Facile synthesis of laser-induced graphene oxide and its humidity sensing properties
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