Laser direct writing of carbonaceous sensors on cardboard for human health and indoor environment monitoring

Ju, Kuan; Gao, Yang; Xiao, Ting; Yu, Cunjiang; Tan, Jianpin; Xuan, Fu‐Zhen

doi:10.1039/d0ra02217a

Cited by 13 publications

(13 citation statements)

References 50 publications

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“…[7][8][9][10] Furthermore, by scanning the laser beam, conductive structures can be directly patterned on polymer substrates with micrometer-scale resolution, [11] facilitating the rapid fabrication of polymer-based flexible devices, such as energy-storage devices and sensors. [7,[11][12][13][14] Although laser modification is promising for the fabrication of flexible devices, currently demonstrated polymer precursors are flexible but inelastic, such as polyimide (PI), polyetherimide (PEI), and biomass (i.e., cellulose). [7,9] Polydimethylsiloxane (PDMS) is a well-known elastomer used in biomedical and flexible devices due to its high biocompatibility, chemical inertness, optical transparency, and elasticity.…”

Section: Introductionmentioning

confidence: 99%

Laser Direct Writing of Highly Crystalline Graphene on Polydimethylsiloxane for Fingertip‐Sized Piezoelectric Sensors

2021

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The patterning of electrically conductive structures directly onto the polydimethylsiloxane (PDMS) surface is crucial for the realization of flexible and elastic devices. Herein, defocused femtosecond laser pulses are irradiated for the fabrication of highly crystalline graphitic carbon structures on PDMS and a high electrical conductivity of %51.6 S m À1 is achieved. Utilizing the elasticity of PDMS and the high conductivity of fabricated structures, a fingertip-sized pressure sensor, which can detect pressures as low as %0.1 Pa, is realized. Moreover, a novel ring-shaped heart rate (HR) monitor, capable of measuring the HR from the index finger, is demonstrated, indicating the potential of fabricated structures in miniature and wearable healthcare applications.

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Section: Introductionmentioning

confidence: 99%

Laser Direct Writing of Highly Crystalline Graphene on Polydimethylsiloxane for Fingertip‐Sized Piezoelectric Sensors

2021

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“…When subjected to pressure, the decrease in hole spacing leads to a decrease in the resistance of LIG [89,141] [Figure 10A], showing a different principle from that of traditional piezoelectric sensors [142] . Table 1 illustrates the performance comparison of LIG-based pressure sensors with others [143][144][145][146][147][148][149] .…”

Section: Pressure Sensormentioning

confidence: 99%

Laser-induced direct graphene patterning: from formation mechanism to flexible applications

2023

Soft Sci

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Laser-induced graphene (LIG), which is directly fabricated by laser carbonization of polymers, has gained much attention in recent years since its first discovery in 2014. Specifically, featuring native porosity, good mechanical properties, and excellent electrical/electrochemical properties, it is considered a promising material for flexible electronic devices. Meantime, LIG can be processed in the atmosphere within a few seconds, thereby significantly reducing the fabrication cost of graphene. Facilitated by these features, this methodology has received great development with worldwide efforts in the following years, including the formation mechanism of LIG, the diversity of laser sources (from infrared laser to ultraviolet laser), the diversity of carbon sources (thermoset polymers, thermoplastic polymers, and natural polymers), and property modulation of LIG (porosity, electrical property, hydrophilic/hydrophobic property, electrochemical property), along with the broad applications of LIG in various flexible electronic devices. Here, the recent advances in the mechanism studies and preparation methods of LIG are comprehensively summarized. The various technologies for the modification of LIG are reviewed. A thorough overview of typical LIG-based flexible electronic devices is presented. Finally, the current challenges and future directions are discussed.

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“…The device was made of interdigitated LIG electrodes and PVA, and exploited the conductivity increase of PVA upon humidity absorption, changing its capacitance with RH. 100 A peculiar combination of cellulosic precursor and lignin was also proposed, with a cellulose/LS ink coated onto a synthetic flexible substrate and then converted into LIG with a laser. 130 The humidity sensor consisted of interdigitated LIG electrodes and a 5−100 μm thick ink layer between the electrode fingers with a 500 μm width and separation.…”

Section: Physical Sensorsmentioning

confidence: 99%

“…Cardboard was LIG scribed and turned into a capacitive humidity sensor. The device was made of interdigitated LIG electrodes and PVA, and exploited the conductivity increase of PVA upon humidity absorption, changing its capacitance with RH . A peculiar combination of cellulosic precursor and lignin was also proposed, with a cellulose/LS ink coated onto a synthetic flexible substrate and then converted into LIG with a laser .…”

Section: Bioderived Lig In Applicationsmentioning

confidence: 99%

Bioderived Laser-Induced Graphene for Sensors and Supercapacitors

Bressi,

Dallinger,

Steksova

et al. 2023

ACS Appl. Mater. Interfaces

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The maskless and chemical-free conversion and patterning of synthetic polymer precursors into laser-induced graphene (LIG) via laser-induced pyrolysis is a relatively new but growing field. Bioderived precursors from lignocellulosic materials can also be converted to LIG, opening a path to sustainable and environmentally friendly applications. This review is designed as a starting point for researchers who are not familiar with LIG and/or who wish to switch to sustainable bioderived precursors for their applications. Bioderived precursors are described, and their performances (mainly crystallinity and sheet resistance of the obtained LIG) are compared. The three main fields of application are reviewed: supercapacitors and electrochemical and physical sensors. The key advantages and disadvantages of each precursor for each application are discussed and compared to those of a benchmark of polymer-derived LIG. LIG from bioderived precursors can match, or even outperform, its synthetic analogue and represents a viable and sometimes better alternative, also considering its low cost and biodegradability.

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Laser direct writing of carbonaceous sensors on cardboard for human health and indoor environment monitoring

Abstract: Carbonaceous sensors on cardboard can be used for human health and indoor environment monitoring.

Cited by 13 publications

References 50 publications

Laser Direct Writing of Highly Crystalline Graphene on Polydimethylsiloxane for Fingertip‐Sized Piezoelectric Sensors

Laser Direct Writing of Highly Crystalline Graphene on Polydimethylsiloxane for Fingertip‐Sized Piezoelectric Sensors

Laser-induced direct graphene patterning: from formation mechanism to flexible applications

Bioderived Laser-Induced Graphene for Sensors and Supercapacitors

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