Laser-synthesis of conductive carbon-based materials from two flexible commercial substrates: A comparison

Houeix, Yann; Romero, Francisco J.; Moraila, Carmen L.; Rivadeneyra, Almudena; Rodríguez, Noel; Morales, Diego P.; Salinas, Alfonso

doi:10.1016/j.apsusc.2023.157629

Cited by 14 publications

(8 citation statements)

References 70 publications

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“…Moreover, the presence of the π-π * transition in both graphene-derived materials also demonstrates the prevalence of the sp 2 hybridization. This satellite peak is in fact very common in electrically conductive carbon materials as a consequence of the excited valence electrons during the characterization process [29].…”

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 94%

“…For instance, the high porosity and available surface area of the LIG make it a perfect candidate for the development of both MSCs and ECG electrodes. On the one hand, LIG has been identified as a promising active material in conventional electrochemical double-layer capacitors (EDLCs), whose charge storage is realized by electrostatic adsorption, owing to its high specific surface area [29]. On the other side, the foam-like structure of the LIG is also of special interest to be used in electrodes for biosignals acquisition due to its high available surface area, which allows for a conformal contact when the electrode is pressed onto the skin, thus contributing to improving the acquisition performance by minimizing motion artifacts and noise [30], [31].…”

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 99%

“…In particular, we obtained sheet resistance values in the range 35 -40 Ω/sq. with a laser configuration of 0.8 W of output power and 40 mm/s of engraving speed [29]. In the case of the GO, the laser fluence required for its conversion into LrGO is much lower than in the case of the PI.…”

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 99%

“…2b) indicates fewer structural defects in the resulting sp² carbon network, which aligns with the underlying process of the laser reduction of GO, mainly based on the removal of oxygen functional groups and the conversion of sp 3 carbon into sp 2 carbon [32]. However, in the case of LIG, the high laser fluence required to break the original oxygen-and nitrogencontaining functional groups of the polyimide structure and to produce a recombination of the carbon bonds to achieve a more conductive state is accompanied by a higher degree of defects and disorders in the final structure [29]. Despite this, the LrGO still presents a higher I2D/IG ratio due to the remaining oxygen functional groups, indicating that the graphene structure is not fully restored.…”

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 99%

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Graphene-Enabled Wearable for Remote ECG and Body Temperature Monitoring

Toral,

Houeix,

Gerardo

et al. 2024

IEEE Flex. Electron.

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This paper presents a comprehensive study on the synthesis, characterization, and integration of laser-synthetized graphene-based materials in a wearable device for non-invasive physiological monitoring. Laser-induced graphene (LIG) and Laser-reduced graphene oxide (LrGO) materials are synthetized and characterized under different techniques to analyze and compare their structural and chemical properties, including scanning electron microscopy (SEM), micro-Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). These materials are used afterwards for the fabrication of temperature sensors, micro-supercapacitors (MSCs), and electrocardiogram (ECG) electrodes. In particular, the temperature dependence of the electrical conductivity of LrGO is exploited for the fabrication of temperature-dependent resistors with a sensitivity of -1.23 kΩ • ºC -1 , which are used as body temperature sensors after being encapsulated into polydimethylsiloxane (PDMS) to increase their linearity and immunity to humidity changes. Moreover, both MSCs and ECG electrodes are developed by leveraging the highly porous structure of LIG, demonstrating a good electrochemical and ECG acquisition performance. Furthermore, a wearable device is designed and fabricated integrating these graphene-based components in a rigid-flex printed circuit board (PCB) together with a Bluetooth Low Energy (BLE) microcontroller, thus enabling the wireless transmission of the physiological data to external monitoring devices. The power consumption has been optimized for extended battery life, allowing continuous monitoring over prolonged periods. Overall, this study demonstrates the feasibility and effectiveness of integrating graphene-based materials into real wearable applications.

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Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 94%

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 99%

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 99%

Section: A Laser-synthesis Of the Graphene-based Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Graphene-Enabled Wearable for Remote ECG and Body Temperature Monitoring

Toral,

Houeix,

Gerardo

et al. 2024

IEEE Flex. Electron.

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“…Laser-based fabrication technology for electrode manufacturing has gained interest in sensor applications. [15] In particular, laser-induced graphene (LIG) [16] fabricated on flexible polymer substrates such as polyimide (PI), [15b,17] polyether imide (PEI), [18] poly(ether sulfone) (PES), [19] paper, [20] wood, [21] etc., with a stable electrical conductivity are actively utilized without or with post treatments for flexible electronics and electrochemical sensing applications. The literature shows that MOFs can serve as precursors for carbonization and metal formation, laser energy is used as a source for the conversion process, and conductive patterns can be directly fabricated on a desired area.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Porous Non‐Enzymatic Glucose Sensing Electrodes Through Nanosecond‐Laser Patterning of Metal–Organic Frameworks

Arthanari,

Sivaprakasam,

Park

et al. 2024

Adv Materials Technologies

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Nanosecond laser patterning of Copper Metal–Organic Framework (Cu‐MOF) coated substrates is performed to fabricate non‐enzymatic glucose sensing electrodes. The Cu‐MOF coated glass substrate with a cover glass is subjected to a laser patterning process; the amount of MOF, laser fluence, and scan speeds mainly influenced the patterning process. The electrodes are fabricated on coated and covered glass with varying electrical conductivity due to the high laser energy absorptivity. The patterned electrodes consist of graphitic carbon incorporated with nano‐Cu and show a stable electrical conductivity on the coated substrates. The electrodes are chemically active in the Fe2+/Fe3+ redox system; however, their activity varies with patterning conditions. The electrochemical studies in alkaline electrolytes reveal that the as‐fabricated electrodes can sense the glucose molecule in the linear concentration range of 0.025–1.0 and 1.0–10.0 mm, with a maximum sensitivity of 3260.3 µA mM−1 cm−2 and a response time of no more than 5 s, and a limit of detection (LOD) of 0.25 µm. The current recovery rate is higher (> 80%) when adding glucose molecules than when adding other interference molecules, confirming that the electrode is selective toward glucose sensing. The results reveal that the fabricated electrodes act as stable, reusable, non‐enzymatic glucose‐sensing electrodes.

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NIR‐Excitable POM‐Encapsulated Yb‐Bi₂S₃ Decorated Graphene for Wearable Photoelectrochemical Sensing

Wang,

Li,

Zhang

et al. 2024

Adv Funct Materials

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Transition metal sulfides have garnered significant interest in the realm of photoelectrochemical (PEC) sensors due to their remarkable optical and electrical properties. However, their intrinsic UV–vis adsorption and electron‐donor consumption severely hinder their nonirritating and in situ epidermal PEC applications. Herein, a NIR‐808 nm light‐excited heterojunction, phosphomolybdic acid‐encapsulated ytterbium‐doped bismuth sulfide (Yb‐Bi2S3/PMA), is synthesized by hydrothermal method for self‐sufficient electron donor‐based PEC sensing. Further, the Yb‐Bi2S3/PMA heterojunction is decorated on flexible and integrated laser‐induced graphene electrode arrays, providing ultrafast charge carrier transfer capacity and robust mechanical durability (300 bending cycles) for subsequent wearable PEC sensing. As a showcase, the aptamer molecular recognition‐based wearable PEC sensor for sweat trace Neuropeptide Y (NPY, a stress or depression biomarker) presents an ultra‐low detection limit (0.39 fM) and good anti‐interference ability. Moreover, the integration of wearable PEC aptasensor with signal processing and wireless communication facilitates nonirritating and in situ analysis of sweat trace NPY dynamics in various real scenarios (feeding behaviors, physiological stress, and circadian rhythm). More broadly, this research establishes the foundation for NIR‐excitable semiconductors equipped with self‐sufficient electron donor capabilities, unlocking the potential for ultrasensitive wearable PEC sensing applications.

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Laser-synthesis of conductive carbon-based materials from two flexible commercial substrates: A comparison

Cited by 14 publications

References 70 publications

Graphene-Enabled Wearable for Remote ECG and Body Temperature Monitoring

Graphene-Enabled Wearable for Remote ECG and Body Temperature Monitoring

Fabrication of Porous Non‐Enzymatic Glucose Sensing Electrodes Through Nanosecond‐Laser Patterning of Metal–Organic Frameworks

NIR‐Excitable POM‐Encapsulated Yb‐Bi₂S₃ Decorated Graphene for Wearable Photoelectrochemical Sensing

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Laser-synthesis of conductive carbon-based materials from two flexible commercial substrates: A comparison

Cited by 14 publications

References 70 publications

Graphene-Enabled Wearable for Remote ECG and Body Temperature Monitoring

Graphene-Enabled Wearable for Remote ECG and Body Temperature Monitoring

Fabrication of Porous Non‐Enzymatic Glucose Sensing Electrodes Through Nanosecond‐Laser Patterning of Metal–Organic Frameworks

NIR‐Excitable POM‐Encapsulated Yb‐Bi2S3 Decorated Graphene for Wearable Photoelectrochemical Sensing

Contact Info

Product

Resources

About

NIR‐Excitable POM‐Encapsulated Yb‐Bi₂S₃ Decorated Graphene for Wearable Photoelectrochemical Sensing