An intelligent artificial throat with sound-sensing ability based on laser induced graphene

Tao, Lu‐Qi; Tian, He; Liu, Ying; Ju, Zhen‐Yi; Pang, Yu; Chen, Yuanquan; Wang, Dan-Yang; Tian, Xiangguang; Yan, Jun-Chao; Deng, Ning-Qin; Yang, Yi; Ren, Tian‐Ling

doi:10.1038/ncomms14579

Cited by 447 publications

(327 citation statements)

References 41 publications

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“…Laser manufacturing has become increasingly popular in material fabrication due to its high throughput and patterning capability. Recently, it was demonstrated that a commercial CO 2 infrared laser scriber can be used to in situ form and pattern 3D porous graphene on polyimide (PI), cloth, paper, and food under ambient conditions. In comparison to the laser‐reduced graphene method, which uses a laser to reduce graphene oxide (GO) films to graphene, the new laser‐induced graphene (LIG) method avoids the use of GO precursors and directly exploits the substrate materials as a carbon source, which greatly simplifies the fabrication process and reduces the cost .…”

Section: Introductionmentioning

confidence: 99%

UV Laser‐Induced Polyimide‐to‐Graphene Conversion: Modeling, Fabrication, and Application

et al. 2019

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In the past decade, graphene has shown great value in both fundamental sciences and practical applications. In spite of the intense research efforts on achieving chemical‐free, low‐temperature processing of high‐quality graphene, cost‐effective synthetic methods to directly fabricate graphene sheets on a substrate are still lacking. Laser‐induced graphene (LIG) is a recently developed method to directly form graphene from carbon‐rich materials. In this work, combined are theoretical and experimental approaches to systematically investigate the light‐material interactions in LIG fabrication processes. First, developed is a molecular dynamics model to disclose the transient formation process of LIG and identified are the critical parameters that govern this process. Following the theoretical prediction, developed is a system to utilize a picosecond UV laser to directly fabricate graphene from polyimide films at room temperature and under atmospheric pressure. After investigating the effects of the laser processing parameters on the LIG quality and subsequent processing optimization, it is experimentally demonstrated that picosecond UV laser processing can be used to prepare high‐quality LIG. With the newly developed LIG, fabricated is a high‐sensitive proximity sensor.

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Section: Introductionmentioning

confidence: 99%

UV Laser‐Induced Polyimide‐to‐Graphene Conversion: Modeling, Fabrication, and Application

et al. 2019

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“…Most recently, the applications of LIG in flexible electronics, artificial throats, supercapacitors, and bacterial air filters have been well explored. [ 41–45 ] However, the studies in LIG‐enabled, electrothermally controlled, mechanically guided 3D assembly are still limited.…”

Section: Figurementioning

confidence: 99%

Laser‐Induced Graphene for Electrothermally Controlled, Mechanically Guided, 3D Assembly and Human–Soft Actuators Interaction

et al. 2020

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Strategically designed, well-defined 3D architectures could offer great opportunities, that are unavailable in their 2D counterparts, for a broad spectrum of applications, such as microelectronics, bioelectronics, photonics and optoelectronics, micro-electromechanical systems, metamaterials, energy storage and harvesting, soft robotics, and many others. Existing manufacturing techniques of 3D structures mainly include 3D printing, templated growth, fluidic self-assembly, and mechanically guided 3D assembly. Among these methods, the mechanically guided 3D assembly has recently attracted broad attention in the scientific community. The process starts from the planar fabrication of patterned 2D precursor structures, followed by the 2D-to-3D shape transformation via controlled rolling, folding, curving, and/ or buckling. [4] This process is naturally compatible with existing advanced planar fabrication technologies (e.g., lithographic and laser-processing techniques). Consequently, micro/nanoscale structures, sensors and/or other functional components Mechanically guided, 3D assembly has attracted broad interests, owing to its compatibility with planar fabrication techniques and applicability to a diversity of geometries and length scales. Its further development requires the capability of on-demand reversible shape reconfigurations, desirable for many emerging applications (e.g., responsive metamaterials, soft robotics). Here, the design, fabrication, and modeling of soft electrothermal actuators based on laser-induced graphene (LIG) are reported and their applications in mechanically guided 3D assembly and human-soft actuators interaction are explored. Over 20 complex 3D architectures are fabricated, including reconfigurable structures that can reshape among three distinct geometries. Also, the structures capable of maintaining 3D shapes at room temperature without the need for any actuation are realized by fabricating LIG actuators at an elevated temperature. Finite element analysis can quantitatively capture key aspects that govern electrothermally controlled shape transformations, thereby providing a reliable tool for rapid design optimization. Furthermore, their applications are explored in human-soft actuators interaction, including elastic metamaterials with human gesture-controlled bandgap behaviors and soft robotic fingers which can measure electrocardiogram from humans in an on-demand fashion. Other demonstrations include artificial muscles, which can lift masses that are about 110 times of their weights and biomimetic frog tongues which can prey insects.

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“…Compared to conventional approaches, this technique offers noncontact and maskless patterning with a resolution that can go down to a submicrometer scale, a localized reaction that makes it less possible to damage the substrate, compatibility with a wide range of materials, and simplified fabrication procedures by combining several process into a single step [1][2][3][4]. These merits meet the requirements for flexible electronic manufactures and lead to many applications, such as conductive electrodes [5,6], capacitors [7][8][9][10], and sensors [2,11,12]. At the same time, the recent literature on laser-scribed electronics is dominated by the transmission and procession of direct current (DC) or low-frequency signals.…”

Section: Introductionmentioning

confidence: 99%

Laser-Scribed Lossy Microstrip Lines for Radio Frequency Applications

Yan

Fang

et al. 2019

Applied Sciences

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Laser-direct writing has become an alternative method to fabricate flexible electronics, whereas the resistive nature of laser-scribed conductors may distort the radio-frequency characteristics of circuits for high-frequency applications. We demonstrate that the transmission characteristics of microstrip lines are insensitive to the resistance of laser-scripted conductors when the sheet resistance is not above 0.32 Ω/ . On the other hand, the transmission and reflection characteristics of the MS lines can be simply modified through the accommodation of the resistance of the conductors, because a laser can trigger the sintering and melting of laser produced silver nanostructures. This could provide an alternative way to fabricate radio frequency (RF) resistors and promote their applications to flexible radio-frequency devices and systems.

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An intelligent artificial throat with sound-sensing ability based on laser induced graphene

Cited by 447 publications

References 41 publications

UV Laser‐Induced Polyimide‐to‐Graphene Conversion: Modeling, Fabrication, and Application

UV Laser‐Induced Polyimide‐to‐Graphene Conversion: Modeling, Fabrication, and Application

Laser‐Induced Graphene for Electrothermally Controlled, Mechanically Guided, 3D Assembly and Human–Soft Actuators Interaction

Laser-Scribed Lossy Microstrip Lines for Radio Frequency Applications

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