Gold-decorated laser-induced graphene for wearable biosensing and joule heating applications

Hsiao, Yu-Sheng; Lin, Yu‐Ting; Chen, Ying-Lin; Tseng, Hsueh-Sheng; Huang, Ting-Hao; Wu, Nian-Jheng; Huang, Jen-Hsien; Weng, Huei Chu; Hsu, Shih-Chieh; Cheng, Ta-Hung; Chen, Chih‐Ping

doi:10.1016/j.jtice.2023.104979

Cited by 13 publications

(1 citation statement)

References 43 publications

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“…Pristine LIG-based devices have found applications in flexible systems such as energy storage devices, electrothermal heaters, and chemical sensors, enduring up to 10,000 bending cycles. − However, the top layer of LIG, which is exposed to air, exhibits weak adhesion due to its porous and fibrous network structure. This makes it susceptible to detachment compared to the LIG adjacent to the substrate, leading to easy lamination or the transfer of LIG patterns , to other substrates.…”

Section: Resultsmentioning

confidence: 99%

In Situ Electrical Contacts to Graphene by Laser Scribing

Park,

Cho

et al. 2024

ACS Appl. Nano Mater.

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Graphene with an atomically thin structure is considered to be a highly sensitive transducer capable of converting diverse external stimuli into measurable electrical signals. The generated signals, such as current and resistance, can be extracted through electrical contact to graphene. Conventional methods for contact formation are usually based on physical deposition of conductive materials on the target graphene. Here, we propose a method for in situ chemical synthesis of electrical contacts to graphene as an alternative approach that complements conventional physical methods. CO 2 laser irradiation on a polyimide film with monolayer graphene on top can convert the polyimide surface to conductive electrodes of laser-induced graphene (LIG) that electrically connect to the existing graphene channel. Laser-scribing conditions, such as the power and scan rate, can modulate the contact resistance of the LIG−graphene junction. Various arbitrary shapes of in situ LIG contacts can be scribed to the direct writing ability of the laser. The proposed in situ LIG contact method can be extended to other carbon nanomaterials, such as carbon nanotubes and PEDOT:PSS. As a proof of concept of the in situ LIG contacts to graphene for electronic device applications, graphene field-effect transistors were demonstrated on a graphene-supported polyimide substrate with LIG−graphene junctions as source/drain electrodes. Our approach will pave the way for the simple and low-cost fabrication of versatile graphene electronic devices by utilizing the existing LIG technology specialized for energy devices and sensors.

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Section: Resultsmentioning

confidence: 99%

In Situ Electrical Contacts to Graphene by Laser Scribing

Park,

Cho

et al. 2024

ACS Appl. Nano Mater.

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Single‐Step Laser Irradiation for Synchronous Formation of Graphene‐Platinum Nanohybrids with Tunable Microstructures Toward High‐Performance Enzyme‐Free Glucose Sensors

Wang,

Han,

Liu

et al. 2024

Adv Materials Technologies

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Manufacturing of metal‐decorated carbon electrodes as a critical component of enzyme‐free glucose sensors has become an advanced strategy for fast and accurate glucose monitoring. By selectively irradiating the pre‐prepared chloroplatinic acid/polyimide (H2PtCl6/PI) precursor with photothermal energy, a creatively synchronized laser processing protocol is developed for assembling integrated three‐electrode system with platinum nanoparticle decorated laser‐induced graphene (PtNP‐LIG). In addition to the swift manufacturing of designable structures, laser power and raw‐material dosage are systematically explored as two key parameters to understand the process‐regulated microstructure and electro‐catalytic performance. Notably, by discovering the tuning mechanism for optimizing laser power‐dependent specific surface area of graphene backbone from 81.61 to 197.53 m2 g−1 and for enhancing H2PtCl6 concentration dependent Pt content from 0.75% to 4.16%, the sensitivity of PtNP‐LIG sensors to glucose oxidation has dramatically improved from 203.14 to 959.07 µA mM−1 cm−2, following closely the adjustable discipline of electrochemically active surface area (ECSA) from 37.75 to 104.19 mm2. Along with rapid response time, low limit of detection, and broad linear range, the proposed protocol is highly beneficial for designing and manufacturing next‐generation wearable human‐health related devices.

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Autonomous Robotic Ultrathin Laser‐Scribed Microheater for Effective Insect Control

Poon,

Zhong,

et al. 2024

Advanced Intelligent Systems

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Insects such as ants and termites have always been a common household hazard, closely correlated to various health risks causing allergies or infections. Present‐day chemical insecticides pose carcinogenic threats to human health and the environment, according to the World Health Organisation. Herein, a novel autonomous robotic ultrathin laser‐scribed microheater is presented as a safe, efficient, and cost‐effective alternative for insect control. A microheater is fabricated using an array of laser‐scribed micro‐wires and an autonomous robotic module, allowing for rapid and uniform heat transfer in less than 3 s. The integrated robotic microheater successfully (100%) eradicates household ants at 60 °C within 30 s. Such results significantly advance insect control, reducing treatment time from hours to seconds while attenuating chemical insecticides’ critical safety and health risks. Ultimately, this innovative approach demonstrates the promise of autonomous robotic microheaters for broader agriculture, healthcare, and manufacturing applications, where insect control is crucial.

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Gold-decorated laser-induced graphene for wearable biosensing and joule heating applications

Cited by 13 publications

References 43 publications

In Situ Electrical Contacts to Graphene by Laser Scribing

In Situ Electrical Contacts to Graphene by Laser Scribing

Single‐Step Laser Irradiation for Synchronous Formation of Graphene‐Platinum Nanohybrids with Tunable Microstructures Toward High‐Performance Enzyme‐Free Glucose Sensors

Autonomous Robotic Ultrathin Laser‐Scribed Microheater for Effective Insect Control

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