Self-adhesive and printable tannin–graphene supramolecular aggregates for wearable potentiometric pH sensing

Lin, Kanglong; Xie, Jiming; Bao, Yu; Ma, Yingming; Chen, Lijuan; Wang, Huan; Xu, Longbin; Tang, Yitian; Liu, Zhenbang; Sun, Zhonghui; Gan, Shiyu; Niu, Li

doi:10.1016/j.elecom.2022.107261

Cited by 10 publications

(7 citation statements)

References 37 publications

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“…The pH indicates important physiological level in the skin sweat. The use of pH as a parameter for sensing in wearable devices has biocompatibility issues and stripping risks. , Lin et al designed a tannin-graphene supramolecular aggregate with strong adhesion to the phenolic hydroxyl groups . The group can be pH sensitive by proton-coupled electron transfer (Figure ).…”

Section: Electronic Skins Through Tactile Sensors For Touch Sensementioning

confidence: 99%

“…(h) The electromotive force (EMF) of the flexible electrode with different pH and (i) Calibration curves with or without bending. Reprinted with permission from ref under the CC BY-NC-ND license (). Copyright 2022 The Authors.…”

Section: Electronic Skins Through Tactile Sensors For Touch Sensementioning

confidence: 99%

“…308,309 Lin et al designed a tannin-graphene supramolecular aggregate with strong adhesion to the phenolic hydroxyl groups. 310 The group can be pH sensitive by protoncoupled electron transfer (Figure 13).…”

Section: For Touch Sensementioning

confidence: 99%

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Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

et al. 2023

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Graphene remains of great interest in biomedical applications because of biocompatibility. Diseases relating to human senses interfere with life satisfaction and happiness. Therefore, the restoration by artificial organs or sensory devices may bring a bright future by the recovery of senses in patients. In this review, we update the most recent progress in graphene based sensors for mimicking human senses such as artificial retina for image sensors, artificial eardrums, gas sensors, chemical sensors, and tactile sensors. The brain-like processors are discussed based on conventional transistors as well as memristor related neuromorphic computing. The brain−machine interface is introduced for providing a single pathway. Besides, the artificial muscles based on graphene are summarized in the means of actuators in order to react to the physical world. Future opportunities remain for elevating the performances of human-like sensors and their clinical applications.

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Section: Electronic Skins Through Tactile Sensors For Touch Sensementioning

confidence: 99%

Section: Electronic Skins Through Tactile Sensors For Touch Sensementioning

confidence: 99%

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Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

et al. 2023

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“…This CCD–based flexible pH sensor can be extended to the detection of other ions, providing a reference for the development of highly sensitive flexible detectors for the detection of other chemicals. Very recently, our work on tannin–graphene (TA–RGO) supramolecular aggregates suggested that they could be used as H + –sensitive materials to fabricate wearable pH sensors [ 116 ] ( Figure 7 C,D). The abundant phenolic hydroxyl groups in TA provide the membrane solution with strong adhesion, such that the material can be strongly attached to the electrode substrate without the use of a binder, thereby improving the potential stability and biocompatibility ( Figure 7 E).…”

Section: Ph-sensitive Materials and Wearable Sensorsmentioning

confidence: 99%

“…( G ) Real–time sweat test of the flexible pH sensor. Reprinted with permission from [ 116 ], Copyright (2022) Elsevier.…”

Section: Figurementioning

confidence: 99%

Recent Advances in Wearable Potentiometric pH Sensors

Tang

Liu

et al. 2022

Membranes

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Wearable sensors reflect the real–time physiological information and health status of individuals by continuously monitoring biochemical markers in biological fluids, including sweat, tears and saliva, and are a key technology to realize portable personalized medicine. Flexible electrochemical pH sensors can play a significant role in health since the pH level affects most biochemical reactions in the human body. pH indicators can be used for the diagnosis and treatment of diseases as well as the monitoring of biological processes. The performances and applications of wearable pH sensors depend significantly on the properties of the pH–sensitive materials used. At present, existing pH–sensitive materials are mainly based on polyaniline (PANI), hydrogen ionophores (HIs) and metal oxides (MOx). In this review, we will discuss the recent progress in wearable pH sensors based on these sensitive materials. Finally, a viewpoint for state–of–the–art wearable pH sensors and a discussion of their existing challenges are presented.

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MoS₂‐Polyaniline Based Flexible Electrochemical Biosensor: Toward pH Monitoring in Human Sweat

Choudhury

Deepak

Bhattacharya

et al. 2023

Macro Materials & Eng

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Wearable pH sensors for sweat analysis have garnered significant scientific attention for the detection of early signs of many physiological diseases. In this study, a MoS2‐polyaniline (PANI) modified screen‐printed carbon electrode (SPCE) is fabricated and used as a sweat biosensor. The exfoliated MoS2 nanosheets are drop casted over an SPCE and are functionalized by a conducting polymer, polyaniline (PANI) via the electropolymerization technique. The as‐fabricated biosensor exhibits high super‐Nernstian sensitivity of −70.4 ± 1.7 mV pH−1 in the linear range of pH 4 to 8 of 0.1 m standard phosphate buffer solution (PBS), with outstanding reproducibility. The sensor exhibits excellent selectivity against the common sweat ions including Na+, Cl−, K+, and NH4+ with tremendous long‐term stability over 180 min from pH 4 to 6. The enhanced active surface area and better electrical conductivity as a consequence of the synergistic effect between MoS2 and PANI are correlated with the boosted performance of the as‐produced biosensor. The feasibility of the sensor is further examined using an artificial sweat specimen and the successful detection confirms the potential of the biosensor for a real‐time noninvasive, skin attachable, and flexible wearable pH sensor.

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Self-adhesive and printable tannin–graphene supramolecular aggregates for wearable potentiometric pH sensing

Cited by 10 publications

References 37 publications

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

Recent Advances in Wearable Potentiometric pH Sensors

MoS₂‐Polyaniline Based Flexible Electrochemical Biosensor: Toward pH Monitoring in Human Sweat

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Self-adhesive and printable tannin–graphene supramolecular aggregates for wearable potentiometric pH sensing

Cited by 10 publications

References 37 publications

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

Recent Advances in Wearable Potentiometric pH Sensors

MoS2‐Polyaniline Based Flexible Electrochemical Biosensor: Toward pH Monitoring in Human Sweat

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Product

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MoS₂‐Polyaniline Based Flexible Electrochemical Biosensor: Toward pH Monitoring in Human Sweat