Reduced graphene oxide-based wearable and bio-electrolyte triggered pressure sensor with tunable sensitivity

Cho, Hyeonho; Lee, Hyoeun; Lee, Sang‐Min; Kim, Sunghan

doi:10.1016/j.ceramint.2021.03.090

Cited by 28 publications

(14 citation statements)

References 67 publications

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“…Among these hydrogels, gelatin is a biodegradable polymer obtained from the hydrolysis of the fibrous insoluble collagen present in bones and skin [10]. Its ability to form a hydrogel that traps a large number of liquid molecules and fillers allows it to enhance the dielectric and mechanical properties of the blends [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Low-Power and Eco-Friendly Temperature Sensor Based on Gelatin Nanocomposite

Landi

Granata

Germano³

et al. 2022

Nanomaterials

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An environmentally-friendly temperature sensor has been fabricated by using a low-cost water-processable nanocomposite material based on gelatin and graphene. The temperature dependence of the electrochemical properties has been investigated by using cyclic voltammetry, chronopotentiometry and impedance spectroscopy measurements. The simple symmetric device, composed of a sandwich structure between two metal foils and a printable graphene–gelatin blend, exhibits a dependence on the open-circuit voltage in a range between 260 and 310 K. Additionally, at subzero temperature, the device is able to detect the ice/frost formation. The thermally-induced phenomena occur at the electrode/gel interface with a bias current of a few tens of μA. The occurrence of dissociation reactions within the sensor causes limiting-current phenomena in the gelatin electrolyte. A detailed model describing the charge carrier accumulation, the faradaic charge transfer and diffusion processes within the device under the current-controlled has been proposed. In order to increase the cycle stability of the temperature sensor and reduce its voltage drift and offset of the output electrical signal, a driving circuit has been designed. The eco-friendly sensor shows a temperature sensitivity of about −19 mV/K, long-term stability, fast response and low-power consumption in the range of microwatts suitable for environmental monitoring for indoor applications.

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Section: Introductionmentioning

confidence: 99%

Low-Power and Eco-Friendly Temperature Sensor Based on Gelatin Nanocomposite

Landi

Granata

Germano³

et al. 2022

Nanomaterials

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“…It is observed that the supercapacitor with CCAH2 electrolyte exhibits an optimal energy density of 72 W h kg −1 at a power density of 300 W k g −1 , which indicates that the capacitive behavior of CCAH2 is better than that of other electrolytes (CCAH1.5 and CCAH3). 34 The specific capacity of the device containing CCAH2 is calculated at a constant charge−discharge current.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Scalable, Quasi-Solid-State Bio-polymer Hydrogel Electrolytes for High-Performance Supercapacitor Applications

Çevik

Günday

Bozkurt

et al. 2022

ACS Sustainable Chem. Eng.

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The development of eco-friendly, quasi-solid-state bio-polymer hydrogel electrolytes has become one of the challenging issues in energy storage. The assembly of safer devices has still been the key to be addressed for safety reasons. The present work reports the synthesis of bio-polymer electrolytes using sodium carboxy methyl cellulose (C)/citric acid (CA) support, which was further intercalated by Hibiscus sabdariffa (H), at various fractions. Stable and scalable blends were produced, and the ion transport was effectively enhanced via insertion of H, which occurred through Na + and H 3 O + ions from the corresponding "host and guest", where no external salt as ion source was inserted. The results showed that H in the hydrogel improved the ionic conductivity while maintaining the homogeneity and electrochemical stability. CCAH was coated on the carbon composite electrodes, and the devices were assembled, followed by experimental analysis under ambient conditions. The device exhibited excellent charge/discharge performance over 10,000 cycles with a specific capacitance of 442 F g −1 . In addition, the device offers a superior energy density of 72 W h kg −1 at a power density of 331 W kg −1 . Using non-toxic quasi-solid-state bio-polymer electrolyte hydrogels in devices may pave the way for safe usage in emerging wearable electronics and energy storage systems.

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“…Except these two types, bio-based pressure senor is another unique type pressure. Sensor is design based on bioreaction like immunoreaction[ 4 – 6 ], electrochemical reactions[ 7 ], chemical reaction[ 3 ]. The types of physical mechanisms involve piezoelectric [ 8 ], capacitive [ 9 ], triboelectric [ 10 ] and piezoresistive [ 11 – 14 ].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional AgNps@Mxene@PEDOT:PSS composite hybrid foam as a piezoresistive pressure sensor with ultra-broad working range

Reddy

Brindha

et al. 2022

J Mater Sci

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Piezoresistive pressure sensors are becoming increasingly popular for their applications in human motion detection, wearable electronics, health monitoring, and man–machine interfaces. Sensors with superior sensitivity and a broad range of sensing are desirable for practical implementation. To achieve those, a low-cost, scalable and simple fabrication technique of dip coating Ti 3 C 2 (MXene), PEDOT:PSS, and AgNPs onto a melamine foam is proposed. The prepared sensor demonstrated sensitivity of 414.27 kPa −1 at (4.17–12.98 kPa), 182.52 kPa −1 at (12.98–94.55 kPa), 317.78 kPa −1 at (94.55 kPa–1.94 MPa), 164.32 kPa −1 at (> 1.94 MPa), extraordinaire detecting range 977.6 N and outstanding repeatability. The sensor was successfully applied for the real-time detection of heartbeat pulse, limb movement, human weight and powered an LED. Furthermore, an integrated circuit design with sensors had the ability to identify spatial pressure distribution and visualize it on a pressure map. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s10853-022-08012-y.

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Reduced graphene oxide-based wearable and bio-electrolyte triggered pressure sensor with tunable sensitivity

Cited by 28 publications

References 67 publications

Low-Power and Eco-Friendly Temperature Sensor Based on Gelatin Nanocomposite

Low-Power and Eco-Friendly Temperature Sensor Based on Gelatin Nanocomposite

Scalable, Quasi-Solid-State Bio-polymer Hydrogel Electrolytes for High-Performance Supercapacitor Applications

Three-dimensional AgNps@Mxene@PEDOT:PSS composite hybrid foam as a piezoresistive pressure sensor with ultra-broad working range

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