Direct Laser Writing of the Porous Graphene Foam for Multiplexed Electrochemical Sweat Sensors

Yang, Li; Wang, He; Abdullah, Abu Musa; Meng, Chuizhou; Chen, Xue; Feng, Ao; Cheng, Huanyu

doi:10.1021/acsami.3c02485

Cited by 20 publications

(5 citation statements)

References 71 publications

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“…Another study mentioned the detection of DA in artificial sweat for the evaluation of mental states and diseases . However, the normal concentration of DA in sweat is nascent. , Since the LOD of the developed sensor is in the picomolar range, the developed sensor can be used for the sensitive detection of DA from sweat. Table shows a comparison of the electrochemical sensing performance of the modified electrodes for DA sensing in sweat.…”

Section: Resultsmentioning

confidence: 99%

MXene-Integrated Single-Stranded Carbon Yarn-Based Wearable Sensor Patch for On-Site Monitoring of Dopamine

Ankitha,

Shamsheera,

Rasheed

2024

ACS Appl. Electron. Mater.

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The demand for noninvasive wearable sensors for on-site monitoring has surged, particularly in the realm of personalized healthcare. This study introduces a pioneering approach employing a MXene-integrated single-stranded carbon yarn-based sensor patch utilizing a minimalist three-thread electrode setup for real-time monitoring of dopamine levels from artificial human sweat. The ability to immediately sew, weave, or stitch sensor platforms onto any type of clothing makes wearable thread-based sensor patches extremely promising, and it can be positioned in close proximity to the skin. Flexible conductive carbon yarn (CCY) was modified by Ti 3 C 2 T x MXene by a facile dip-coating method which was used as sensing electrodes. Leveraging MXene's high surface area and exceptional conductivity, the sensor's architecture achieved heightened sensitivity and selectivity in dopamine detection and reproducibility in a broad linear range of 1 nM−1 μM with a detection limit of 316 pM, along with real sample tests showing the promise of this platform for real-time physiological monitoring of human performance/fitness under stress as well as diagnostic monitoring through sweat analysis. The three-thread electrode configuration, strategically embedded within the patch, ensures ease of use and comfortable, noninvasive on-body application, offering a promising avenue for continuous, real-time monitoring of dopamine levels in individuals with neurological disorders or relevant medical conditions. This study highlights the potential of MXene-integrated wearable sensor patches with a minimalist electrode setup, advancing the field of wearable sensing technologies for personalized healthcare and point-of-care diagnostics.

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Section: Resultsmentioning

confidence: 99%

MXene-Integrated Single-Stranded Carbon Yarn-Based Wearable Sensor Patch for On-Site Monitoring of Dopamine

Ankitha,

Shamsheera,

Rasheed

2024

ACS Appl. Electron. Mater.

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“…The humidity sensor is also very important to detect changes in moisture levels during respiration and skin perspiration. − The former can be used to estimate health conditions, whereas the latter allows the characterization of skin conditions and barrier functions. − Designed in an interdigital electrode (Figure b), the on-skin humidity sensor can detect the changes in humidity levels on the skin surface through the measured capacitance. After the calibration with a commercial humidity sensor (Figure S11), humidity changes on the skin surface can be successfully measured during hydrous exhalation for various durations.…”

Section: Resultsmentioning

confidence: 99%

Ultraconformal Skin-Interfaced Sensing Platform for Motion Artifact-Free Monitoring

Gao,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Capable of directly capturing various physiological signals from human skin, skin-interfaced bioelectronics has emerged as a promising option for human health monitoring. However, the accuracy and reliability of the measured signals can be greatly affected by body movements or skin deformations (e.g., stretching, wrinkling, and compression). This study presents an ultraconformal, motion artifact-free, and multifunctional skin bioelectronic sensing platform fabricated by a simple and user-friendly laser patterning approach for sensing high-quality human physiological data. The highly conductive membrane based on the room-temperature coalesced Ag/Cu@Cu core–shell nanoparticles in a mixed solution of polymers can partially dissolve and locally deform in the presence of water to form conformal contact with the skin. The resulting sensors to capture improved electrophysiological signals upon various skin deformations and other biophysical signals provide an effective means to monitor health conditions and create human-machine interfaces. The highly conductive and stretchable membrane can also be used as interconnects to connect commercial off-the-shelf chips to allow extended functionalities, and the proof-of-concept demonstration is highlighted in an integrated pulse oximeter. The easy-to-remove feature of the resulting device with water further allows the device to be applied on delicate skin, such as the infant and elderly.

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“…Thus, they can be exceptionally efficient in decreasing the effective modulus. These methods for manufacturing, including utilizing porous objects themselves, embedding particles or water molecules and subsequently removing them, , or using lasers. , …”

Section: Strain-compliance With Lowering Effective Moduli Of Material...mentioning

confidence: 99%

Materials and Structural Designs toward Motion Artifact-Free Bioelectronics

Park,

Jeong,

et al. 2024

Chem. Rev.

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Bioelectronics encompassing electronic components and circuits for accessing human information play a vital role in real-time and continuous monitoring of biophysiological signals of electrophysiology, mechanical physiology, and electrochemical physiology. However, mechanical noise, particularly motion artifacts, poses a significant challenge in accurately detecting and analyzing target signals. While software-based "postprocessing" methods and signal filtering techniques have been widely employed, challenges such as signal distortion, major requirement of accurate models for classification, power consumption, and data delay inevitably persist. This review presents an overview of noise reduction strategies in bioelectronics, focusing on reducing motion artifacts and improving the signal-to-noise ratio through hardware-based approaches such as "preprocessing". One of the main stress-avoiding strategies is reducing elastic mechanical energies applied to bioelectronics to prevent stress-induced motion artifacts. Various approaches including strain-compliance, strain-resistance, and stress-damping techniques using unique materials and structures have been explored. Future research should optimize materials and structure designs, establish stable processes and measurement methods, and develop techniques for selectively separating and processing overlapping noises. Ultimately, these advancements will contribute to the development of more reliable and effective bioelectronics for healthcare monitoring and diagnostics.

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Direct Laser Writing of the Porous Graphene Foam for Multiplexed Electrochemical Sweat Sensors

Cited by 20 publications

References 71 publications

MXene-Integrated Single-Stranded Carbon Yarn-Based Wearable Sensor Patch for On-Site Monitoring of Dopamine

MXene-Integrated Single-Stranded Carbon Yarn-Based Wearable Sensor Patch for On-Site Monitoring of Dopamine

Ultraconformal Skin-Interfaced Sensing Platform for Motion Artifact-Free Monitoring

Materials and Structural Designs toward Motion Artifact-Free Bioelectronics

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