Skin-inspired, open mesh electrochemical sensors for lactate and oxygen monitoring

Recent Advances in Skin Chemical Sensors

“…The drawback is that colorimetric assays are generally poorly quantitative. As an example of ab electrochemical device, Ashley et al [27] focused their work on the geometry of the conducting tracks onto a highly conformable electrochemical patch made of polyimide (PI) and silicone (Figure 1), the final goal being the creation of sensors capable of adapting to all curvatures of the human body and resisting to the natural mechanical stresses applied to the skin while, at the same time, allowing the mass transfer of gas and fluids from the skin surface to the sensing material. The basic idea is that the conductive tracks are highly curved (coiled) to be stretchable in every direction.…”

“…( B ) Pictures of a transferred printed flexible array, fixed with a liquid bandage, under mechanical stress. Reproduced from [27] with permission. Copyright 2019 Elsevier B.V.…”

Advances and current challenges in non‐invasive wearable sensors and wearable biosensors—A mini‐review

“…They are focused on the detection and quantification of physical and chemical properties of metabolites, electrolytes in biological fluids (Mahato et al, 2017; Purohit et al, 2020; Scognamiglio & Arduini, 2019). The principal biological fluids evaluate sweat, interstitial fluid (ISF), tears or saliva through enzymatic, electrochemical or colorimetric (optics) reactions (Ashley et al, 2019; Bariya et al, 2018; Bussan & Robertson, 2019; Chao et al, 2017; Eftekhari et al, 2018; Ghrera et al, 2018; Kaur et al, 2018; Legner et al, 2019; Parrilla, Cuartero, & Crespo, 2019; Ray, Choi, Reeder, et al, 2019; Tasca et al, 2019). In this context, WS can be used to monitor a wide range of targets, such as body movements, or signals from the environment outside the body, such as exposure to vapours or environmental toxins.…”

“…(j) wearable ring‐based sensor platform embedded with marijuana‐designed sensor for detecting THC alcohol the scale bar 15 mm (reproduced with permission (Mishra et al, 2020) © 2020 Elsevier B.V. All rights reserved). (k) Gold electrodes inspired by the skin Images of the device under mechanical distortion (reproduced with permission (Ashley et al, 2019) © 2019 Elsevier B.V. All rights reserved). (l) sock‐type wearable sensor for estimating lower leg muscle activity with ten conductive‐fabric electrodes around the ankle (reproduced under the terms of the CC BY‐NC licence (Isezaki et al, 2019) Copyright 2019, the authors, sensors, MDPI).…”

Smart Bandage With Wireless Strain and Temperature Sensors and Batteryless NFC Tag

“…They are based on monitoring parameters, such as pH [17]- [22], This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ temperature [23]- [25], uric acid [21], [26], moisture [27], oxygen [28], [29], lactate [29], pressure and strain [30]- [33], and others [14], [15], [34], [35]. However, none of these smart bandages is capable of measuring simultaneously the temperature and strain, even if they provide the crucial information about wound status.…”