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Laser induced graphene /ceramic membrane composite: Preparation and characterization
摘要： In this work, laser induced graphene (LIG) was successfully fabricated on microporous ceramic membranes. The surface area, morphology, and chemical characterizations were performed on the LIG layer. Water contact angle measurements showed the hydrophobicity of LIG. Pure water and solvents with different polarities were used to understand the solvent flux behavior of LIG membrane. The LIG membrane showed very high non-polar solvent fluxes and remarkably low water permeability, and thus, the transport through the LIG membrane is related to dipole moment and dielectric constant, represented by solvent polarity. The LIG membrane achieved 90% rejection for 255 nm diameter silica particles, suggesting the presence of submicron size connecting pore channels that dominate the transport mechanism.
关键词： Laser induced graphene,LIG/Ceramic composite,Solvent permeation
更新于2025-09-19 17:13:59
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A highly flexible and selective dopamine sensor based on Pt-Au nanoparticle-modified laser-induced graphene
摘要： A highly flexible and selective electrochemical sensor based on a Pt-Au nanoparticles (Pt-AuNPs) modified laser-induced graphene (LIG)/Polydimethylsiloxane (PDMS) electrode is presented for the detection of dopamine (DA). The Pt-AuNPs exhibited high electrocatalytic activity in response to the oxidation of DA, and the peak current of DA detected by the Pt-AuNPs/LIG/PDMS electrode linearly increased with DA concentration. The fabricated sensor also exhibited an excellent sensitivity of approximately 865.80 μA/mM cm?2 and a detection limit of 75 nM in a neutral solution. In addition, it showed high selectivity for interfering compounds such as like uric acid (UA) and ascorbic acid (AA). Clearly defined current peaks, with a separation of approximately 0.11 V, were observed for DA and UA. Finally, DA was successfully detected in human urine.
关键词： Metal nanoparticles,Laser-induced graphene,Dopamine,Flexible substrate,Electrochemical sensor
更新于2025-09-19 17:13:59
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Laser-Induced Graphene-Based Platforms for Dual Biorecognition of Molecules
摘要： Expanding the single molecule detection, enabled by laser-induced graphene (LIG) technology, for portable and on-site analysis, a dual molecule system with a two-working electrode architecture was developed, for ascorbic acid (AA) and amoxicillin (AMOX) detection, which are currently used in aquaculture and persist as water contaminants. The biorecognition element of each target compound was a suitable molecularly-imprinted polymer (MIP). The AMOX MIP was developed herein for the first time and assembled by electropolymerization of eriochrome black T (EBT). It showed a wide linear response from 100 nM to 50 μM, with a sensitivity of -13.32 μA/decade. Calibration curves revealed good squared correlation coefficients (R2 > 0.99) with a limit of detection (LOD) of 11.98 nM. AA MIP was assembled according to previous work reported in the literature, displaying a linear response from 1.5 mM to 4 mM and a sensitivity of 1.356 μA/decade. The developed dual-LIG device was further tested in real samples and successfully applied to the analysis of binary mixtures prepared in environmental water samples from a well. Overall, the proposed device allows in-situ analysis of two different molecules, holds an exceptionally low-cost design when compared to competing architectures in the literature, and, the fabrication method here employed offers the possibility of easily adjusting the desired architecture on demand.
关键词： Amoxicillin,Ascorbic acid,Laser-induced graphene,Molecularly-imprinted polymer technology,Dual detection
更新于2025-09-19 17:13:59
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Stable and durable laser-induced graphene patterns embedded in polymer substrates
摘要： The stability and durability of laser-induced graphene (LIG) patterns embedded in polymer substrates are significant for their practical application. However, most of currently reported LIG precursors are facing the dilemma of weak structural controllability, poor resistance to acid/base, or bad processability. In this work, we efficiently converted the synthesized poly(Ph-ddm) into LIG using a straightforward CO2 laser, aiming to find a potential LIG precursor with excellent durability under harsh conditions. The graphene structure of obtained LIG was confirmed by Raman spectra, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). Results indicated that the poly(Ph-ddm)-based LIG showed a low sheet resistance of 35 ?/sq as well as a high specific surface area of 883 m2/g. And due to the superior properties of poly(Ph-ddm), the LIG patterns exhibited excellent resistance to strong acid/base solutions and high adhesion on the substrate, which ensured their stable application under severe conditions. Besides, potential application of as-prepared LIG was demonstrated in well-performed supercapacitors and electrode for water splitting in an alkaline medium. Based on the results in this work, polybenzoxazine could be a promising precursor for stable and durable LIG preparation.
关键词： electrode for water splitting,laser-induced graphene,durability,supercapacitor,Polybenzoxazine
更新于2025-09-19 17:13:59
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Laser-induced photothermal generation of flexible and salt-resistant monolithic bilayer membranes for efficient solar desalination
摘要： Harvesting solar energy and generating steam through solar thermal energy are viable approaches with diverse applications such as power generation, desalination, and water purification. Particularly, for efficient and stable solar desalination, hierarchically porous materials are desired to enable the required multiple functionalities. However, high thermal/chemical energy required and time consumed remain roadblocks. In this study, a facile, fast, and scalable laser-induced photothermal method to achieve flexible monolithic bilayer sheets (MBS) of hierarchically porous graphitic carbon (HPGC) and polymeric foam for use in salt-resistant and flexible solar steam generators is reported. The MBS-based self-floating solar steam generator shows outstanding solar desalination performance with a solar thermal efficiency of 83.2% (1-sun) and a high salt-rejection ratio (99.9%). Efficient solar thermal energy transformation is achieved by the versatile multi-functionalities of the MBS, including broad-spectrum solar light absorption, heat localization, and capillary action. Anisotropic wetting properties of hydrophobic HPGC and hydrophilic polyimide (PI) foam effectively prevent salt accumulation on the HPGC surface. The salt-resistant MBS enable long-term stability for solar desalination with actual seawater. Our laser-based photothermal method has potential in the development of high-performance solar thermal systems with substantial cost reduction by scalable production of multiscale hierarchically structured materials from micro-structured polymers.
关键词： monolithic bilayer structures,solar evaporation,porous polyimide,salt-resistant solar steam generators,self-floating,flexibility,laser-induced graphene
更新于2025-09-19 17:13:59
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Synthesis and Characterization of Laser Induced Graphene (LIG) and laser Reduced Graphene Oxide (lrGO) by using a pulsed CO <sub/>2</sub> laser
摘要： We detail a method to produce graphite materials with a three-dimensional, flexible and porous structure obtained from the exposure to CO2 laser radiation. One of them is Laser Induced Graphene (LIG) grown from an insulating polyimide as raw material, and the other is laser reduced graphene oxide (lrGO), obtained from a graphene oxide (GO) thin film. For both materials, we describe their morphology, crystalline structure and electrical characterizations. These materials have important applications in organic electronics technology.
关键词： LIG,laser reduced graphene oxide,Laser Induced Graphene,lrGO,flexible electronics,CO2 laser
更新于2025-09-16 10:30:52
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Flexible and Highly Sensitive Strain Sensor Based on Laser-Induced Graphene Pattern Fabricated by 355 nm Pulsed Laser
摘要： A laser-induced-graphene (LIG) pattern fabricated using a 355 nm pulsed laser was applied to a strain sensor. Structural analysis and functional evaluation of the LIG strain sensor were performed by Raman spectroscopy, scanning electron microscopy (SEM) imaging, and electrical–mechanical coupled testing. The electrical characteristics of the sensor with respect to laser fluence and focal length were evaluated. The sensor responded sensitively to small deformations, had a high gauge factor of ~160, and underwent mechanical fracture at 30% tensile strain. In addition, we have applied the LIG sensor, which has high sensitivity, a simple manufacturing process, and good durability, to human finger motion monitoring.
关键词： polydimethylsiloxane (PDMS),355 nm pulsed laser,strain sensor,laser-induced graphene (LIG),polyimide
更新于2025-09-16 10:30:52
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Laser-induced graphene and carbon nanotubes as conductive carbon-based materials in environmental technology
摘要： Nanotechnology and nanomaterials have attracted interest due to their potential in mitigating contemporary environmental challenges, such as the stressors imposed by increased industrial and agricultural activities, and the deterioration of air, soil and water quality. In particular, advanced technologies that harness carbon-based nanomaterials are poised to emerge as tools that provide new solutions for the global water crises. These tools include, electrically conductive membrane processes, which uniquely combine a separation process with a functional surface. In this respect, laser-induced graphene (LIG) and carbon nanotubes (CNTs) are electrically conductive carbon nanomaterials that hold great utility in a multitude of environmental applications, including the development of fouling-resistant systems for desalination and water treatment, enhanced separation methods, and innovative pollutant sensing and electrocatalytic platforms. Consequently, this review article describes and compares some important recent advances in LIG- and CNT-based electroactive surfaces. The discussion of LIG as an emerging carbon material set in context with CNTs is intended to shed light on future directions and development possibilities to meet the growing global challenges in terms of water treatment applications of both materials as well as other electrically conductive carbon-based nanomaterials exhibiting exceptional performance and versatility.
关键词： environmental applications,nanomaterials,electrically conductive membrane processes,laser-induced graphene,Nanotechnology,water treatment,carbon nanotubes,carbon-based nanomaterials
更新于2025-09-16 10:30:52
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[IEEE 2019 16th International Multi-Conference on Systems, Signals & Devices (SSD) - Istanbul, Turkey (2019.3.21-2019.3.24)] 2019 16th International Multi-Conference on Systems, Signals & Devices (SSD) - Investigation of Laser Induced Graphene Electrodes Modified by MWNT/AuNPs for Detection of Nitrite
摘要： In this paper, a novel low cost electrode material for sensing is presented which demonstrates excellent electrochemical response to nitrite while being amenable to implementation in disposable point of care nitrite sensors. Laser induced grapheneous carbon (LIG) is based on a simple laser engraving method to fabricate electrodes by inducing conductive paths onto Kapton polymer substrate. The working electrode was modified by Gold Nanoparticles (AuNPs), multiwalled carbon nanotubes (MWCNT) and AuNPs/MWCNT. The modified electrodes were characterized by electron microscopy energy x-ray dispersive spectroscopy (SEM-EDX), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Surface morphology and electrochemical methods confirms confirm the successful implementation of LIG electrodes whose electrocatalytic performance is highly improved after modification. This suggests the synergetic effect between AuNPs and MWCNTs with the excellent conductivity and large specific surface area. By means of square wave voltammetry (SWV), the limit of detection of the proposed sensor is 6.75 μM, which is low enough for practical applications. In conclusion, AuNPs/MWCNT modified LIG electrodes demonstrated good electrochemical behavior and promising future use in disposable nitrite electrochemical sensors.
关键词： electrochemical sensing,nitrite detection,carbon nanotubes,gold nanoparticles,Laser induced graphene
更新于2025-09-16 10:30:52
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A flexible non-enzymatic glucose sensor based on copper nanoparticles anchored on laser-induced graphene
摘要： An original flexible enzyme-free glucose amperometric biosensor based on Cu nanoparticles anchored on laser-induced graphene (Cu NPs-LIG) composite is successfully developed by a simple substrate-assisted electroless deposition (SAED) technique. The as-prepared Cu NPs-LIG sensor demonstrates an excellent glucose sensitivity of 495 μA mM-1 cm-2, ultrafast response time less than 0.5 s and the prominently low detection limit of 0.39 μM. Besides, the sensor shows extraordinary reproducibility, stability and selectivity in glucose sensing. Finally, a possible mechanism of the Cu NPs-LIG sensor for glucose sensing is proposed. Due to the simplicity preparation and performance reliability, the novel flexible Cu NPs-LIG sensor is an attractive candidate for next generation wearable and implantable non-enzymatic glucose diagnostic devices.
关键词： copper nanoparticles,non-enzymatic glucose sensor,electroless deposition,flexible,laser-induced graphene
更新于2025-09-16 10:30:52