Laser-Induced Graphene Composites as Multifunctional Surfaces

Luong, Duy Xuan; Yang, Kai-Chun; Yoon, Jongwon; Singh, Swatantra P.; Wang, Tuo; Arnusch, Christopher J.; Tour, James M.

doi:10.1021/acsnano.8b09626

Cited by 133 publications

(200 citation statements)

References 40 publications

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“…This process enables the development of LIG bending sensors that are mechanically flexible, lightweight, robust, and multifunctional. Several studies on LIG strain sensors have investigated the laser power effect on the GF of the functionalized LIG, [35][36][37] some focused on embedding LIG on cured elastomers, [38][39][40][41] while others discovered alternative lasers that fabricate LIG, 42,43 The piezoresistive properties of LIG were utilized for generating and detecting sounds, 43 gesture registration, 35 respiratory rate, 44 and human-machine interface. 40 The LIG sensors in this study are used for the detection of curvature, force, deflection, and flow.…”

Section: Introductionmentioning

confidence: 99%

Wearable multifunctional printed graphene sensors

et al. 2019

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The outstanding properties of graphene have initiated myriads of research and development; yet, its economic impact is hampered by the difficulties encountered in production and practical application. Recently discovered laser-induced graphene is generated by a simple printing process on flexible and lightweight polyimide films. Exploiting the electrical features and mechanical pliability of LIG on polyimide, we developed wearable resistive bending sensors that pave the way for many cost-effective measurement systems. The versatile sensors we describe can be utilized in a wide range of configurations, including measurement of force, deflection, and curvature. The deflection induced by different forces and speeds is effectively sensed through a resistance measurement, exploiting the piezoresistance of the printed graphene electrodes. The LIG sensors possess an outstanding range for strain measurements reaching >10% A double-sided electrode concept was developed by printing the same electrodes on both sides of the film and employing difference measurements. This provided a large bidirectional bending response combined with temperature compensation. Versatility in geometry and a simple fabrication process enable the detection of a wide range of flow speeds, forces, and deflections. The sensor response can be easily tuned by geometrical parameters of the bending sensors and the LIG electrodes. As a wearable device, LIG bending sensors were used for tracking body movements. For underwater operation, PDMS-coated LIG bending sensors were integrated with ultra-low power aquatic tags and utilized in underwater animal speed monitoring applications, and a recording of the surface current velocity on a coral reef in the Red Sea.npj Flexible Electronics (2019) 3:15 ; https://doi.

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Section: Introductionmentioning

confidence: 99%

Wearable multifunctional printed graphene sensors

et al. 2019

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“…Carbon based electro‐thermal materials have drawn much attention in energy conversion and storage applications owing to their significant impact on the intermittent renewable energy sources. [ 1 ] Especially, carbon nanotubes (CNTs), [ 2 ] reduced graphene oxide (RGO) [ 3 ] and graphene [ 4 ] emerged as alternative materials to traditional metal electro‐thermal materials [ 5 ] due to their excellent electrical/thermal conductivity, large mechanical strength, high chemical stability and low heat‐transfer coefficient. It is well known that an ideal electro‐thermal material should realize a high saturation temperature even at a low operation voltage.…”

Section: Introductionmentioning

confidence: 99%

Network Structural CNTs Penetrate Porous Carbon Support for Phase‐Change Materials with Enhanced Electro‐Thermal Performance

Dong

et al. 2020

Adv Elect Materials

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Electro‐thermal phase‐change materials (PCMs) enable continuous operation of heating‐related processes, which is urgently required for modern thermal‐management devices. Driven by the unmet needs to develop promising electro‐thermal PCMs with low operation voltage and high electro‐thermal storage efficiency simultaneously, unique ZIF@MOF‐derived carbon‐nanotube (CNT)‐penetrated porous carbon supports for electro‐thermal PCMs are introduced. The network structure of the support decreases the resistivity of the composite and ensures a low operation voltage. Furthermore, abundant CNT cores in porous carbon shells facilitate interfacial interaction between the PCMs and the support and realize a rapid heat transformation. It is noted that low thermal conductive porous carbon shells prevent convective heat dissipation at the CNT‐air interface to a great degree which leads to enhanced electro‐thermal storage efficiency. Consequently, the obtained electro‐thermal PCMs exhibit a low operation voltage of 1.1 V and a record‐high electro‐thermal storage efficiency of 94.5%, which shows great potential in thermal management of electronic devices.

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“…41,42 This type of technology can achieve the simultaneous regulation of the chemical structure and physical structure of carbon-based materials, and can be used to obtain microstructure protrusions on the surface of materials by regulating the laser conditions. 43,44 Recently, functionalization has been achieved using laser-induced techniques on various carbon-based materials for broad applications, such as in wearable human body detection and electrocatalysis. [45][46][47][48] However, for rigid active materials, the single laser-induced technique still has limitations in the preparation of stretchable 3D structural lms.…”

Section: Introductionmentioning

confidence: 99%