Journal ArticleDOI
Highly Efficient Laser Scribed Graphene Electrodes for On-Chip Electrochemical Sensing Applications
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TLDR
In this article, a direct-write laser scribing process was used to transform polyimide sheet into graphitic carbon with self-standing porous 3D morphology, and abundant edge planes.Abstract:
This study reports the fabrication of flexible electrochemical sensors using a direct-write laser scribing process that transforms commercial polyimide sheet into graphitic carbon with self-standing porous 3D morphology, and abundant edge planes. The heterogeneous electron transfer rate (k0) of the laser scribed graphene (LSG) electrodes for both inner-sphere and outer-sphere redox mediators, ferrocyanide ([Fe(CN)6]4−) and hexaammineruthenium ([Ru(NH3)6]3+) are estimated to be 0.1150 and 0.0868 cm s−1, respectively. These values are significantly higher than those for similar carbon based materials, which this study ascribes to the binder free 3D porous network of LSG with enriched edge plane sites. Further, k0 is enhanced up to 0.2823 and 0.2312 cm s−1 for inner and outer-sphere redox mediators by selective anchoring of Pt nanoparticles over LSG. The LSG electrodes exhibit significantly improved electrocatalytic activity toward oxidation of ascorbic acid (AA), dopamine (DA), and uric acid (UA). Consequently, the detection of these biomarkers is achieved with high sensitivity of 237.76 and 250.69 μA mm−1 cm−2 (AA), 2259.9 and 6995.6 μA mm−1 cm−2 (DA) and 5405 and 8289 μA mm−1 cm−2 (UA) for LSG and Pt/LSG electrodes, respectively, in a wide concentration range. These results outperform previously reported 2D/3D graphene based electrodes.read more
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Journal ArticleDOI
Laser-Induced Graphene by Multiple Lasing: Toward Electronics on Cloth, Paper, and Food
TL;DR: A method of using multiple pulsed-laser scribing to convert a wide range of substrates into laser-induced graphene (LIG) using this multiple lase method, which can be implemented without increasing processing times when compared with laser induction of graphene on polyimide (Kapton) substrates.
Journal ArticleDOI
Laser-Induced Graphene: From Discovery to Translation.
TL;DR: The strategies that have been developed to synthesize LIG are summarized, including the control of LIG properties such as porosity, composition, and surface characteristics, and the advancement in methodology to convert diverse carbon precursors into LIG.
Journal ArticleDOI
Laser-Induced Graphene Formation on Wood.
TL;DR: A facile approach is reported to transform wood into hierarchical porous graphene using CO2 laser scribing to inspire both research and industrial interest in the development of wood-derived graphene materials and their nanodevices.
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Laser-Induced Graphene
TL;DR: The ease of formation of LIG, its simple scale-up, and its utility for a range of applications highlights the easy transition of this substrate-bound graphene foam into commercial device platforms.
Journal ArticleDOI
Sensitive, selective, disposable electrochemical dopamine sensor based on PEDOT-modified laser scribed graphene.
Guangyuan Xu,Zahraa A. Jarjes,Valentin Desprez,Paul A. Kilmartin,Jadranka Travas-Sejdic,Jadranka Travas-Sejdic +5 more
TL;DR: For the first time, PEDOT-modified LSG have been fabricated and assessed for high-performance dopamine sensing using cost-effective, disposable electrodes, with potential for development in further sensing applications.
References
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TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
Journal ArticleDOI
Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors
TL;DR: It is shown that graphite oxide sheets can be converted by infrared laser irradiation into porous graphene sheets that are flexible, robust, and highly conductive, and hold promise for high-power, flexible electronics.
Journal ArticleDOI
Theory and Application of Cyclic Voltammetry for Measurement of Electrode Reaction Kinetics.
Journal ArticleDOI
Laser-induced porous graphene films from commercial polymers
Jian Lin,Zhiwei Peng,Yuanyue Liu,Francisco Ruiz-Zepeda,Ruquan Ye,Errol L. G. Samuel,Miguel Jose Yacaman,Boris I. Yakobson,James M. Tour +8 more
TL;DR: A one-step, scalable approach for producing and patterning porous graphene films with 3-dimensional networks from commercial polymer films using a CO2 infrared laser to provide a rapid route to polymer-written electronic and energy storage devices.
Journal ArticleDOI
3D Graphene–Cobalt Oxide Electrode for High-Performance Supercapacitor and Enzymeless Glucose Detection
Xiaochen Dong,Hang Xu,Xuewan Wang,Yinxi Huang,Mary B. Chan-Park,Hua Zhang,Lianhui Wang,Wei Huang,Peng Chen +8 more
TL;DR: The 3D graphene/Co(3)O(4) composite was used as the monolithic free-standing electrode for supercapacitor application and for enzymeless electrochemical detection of glucose and it is demonstrated that it is capable of delivering high specific capacitance and detecting glucose with a ultrahigh sensitivity.