Reduced Graphene Oxide-Based Double Network Polymeric Hydrogels for Pressure and Temperature Sensing

Liu, Wei; Zhang, Xiaoyuan; Wei, Gang; Su, Zhiqiang

doi:10.3390/s18093162

Cited by 23 publications

(19 citation statements)

References 37 publications

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“…19b). In addition, different polymerization methods among polymer monomers combined with graphene can also produce excellent pressure-sensing materials [136][137][138]. The as-fabricated tactile sensors based on these active layers not only possessed a high pressuresensing performance but also achieved self-healing, thermal response and other properties of human skin, attaining the ideal platform to realize the practical application of E-skin.…”

Section: Combined With Polymersmentioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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HIGHLIGHTS• Tremendous progress has been advanced by research into graphene and its derivatives with great benefits toward low-cost, portable, and real-time tactile sensors/electronic skin.• The review presented herein direct future efforts aimed at high-quality graphene-based tactile sensors and their implications for the wider scientific community.• The paper also are informative regarding some basic and crucial issues regarding graphene and its derivatives, such as charge-transport principles, doping/trapping behaviors, correlations between structure/morphology and properties/functions.ABSTRACT Skin is the largest organ of the human body and can perceive and respond to complex environmental stimulations. Recently, the development of electronic skin (E-skin) for the mimicry of the human sensory system has drawn great attention due to its potential applications in wearable human health monitoring and care systems, advanced robotics, artificial intelligence, and human-of graphene materials; (2) state-of-the-art protocols recently developed for high-performance tactile sensing, including representative examples; and (3) perspectives and current challenges for graphene-based tactile sensors in E-skin applications. A summary of these cutting-edge developments intends to provide readers with a deep understanding of the future design of high-quality tactile sensing devices and paves a path for their future commercial applications in the field of E-skin.

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Section: Combined With Polymersmentioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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“…Additional work can be done to survey users on the comfort of the device to improve and miniaturize future designs. New iterations of the device design may also replace commercial sensors with bespoke counterparts that utilize emerging biofabrication techniques to improve temperature and electrochemical sensing as well as miniaturization for comfort enhancements [31,32].…”

Section: Discussionmentioning

confidence: 99%

Wearable Sensor System to Monitor Physical Activity and the Physiological Effects of Heat Exposure

Pham

Yeap

Escalera

et al. 2020

Sensors

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Mobile health monitoring via non-invasive wearable sensors is poised to advance telehealth for older adults and other vulnerable populations. Extreme heat and other environmental conditions raise serious health challenges that warrant monitoring of real-time physiological data as people go about their normal activities. Mobile systems could be beneficial for many communities, including elite athletes, military special forces, and at-home geriatric monitoring. While some commercial monitors exist, they are bulky, require reconfiguration, and do not fit seamlessly as a simple wearable device. We designed, prototyped and tested an integrated sensor platform that records heart rate, oxygen saturation, physical activity levels, skin temperature, and galvanic skin response. The device uses a small microcontroller to integrate the measurements and store data directly on the device for up to 48+ h. continuously. The device was compared to clinical standards for calibration and performance benchmarking. We found that our system compared favorably with clinical measures, such as fingertip pulse oximetry and infrared thermometry, with high accuracy and correlation. Our novel platform would facilitate an individualized approach to care, particularly those whose access to healthcare facilities is limited. The platform also can be used as a research tool to study physiological responses to a variety of environmental conditions, such as extreme heat, and can be customized to incorporate new sensors to explore other lines of inquiry.

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“…Recently, hydrogels, which are insoluble in water yet capable of absorbing water and exhibit three-dimensional (3D) network structures and are composes of molecular nanocages, have been used to control the nucleation and growth of the nanoclusters [ 22 , 33 , 34 , 35 , 36 , 37 ]. The hydrogel material as a template to prepare nanomaterials such as quantum dots should also have the following properties: (i) The template is able to maintain its properties stable during the reaction process.…”

Section: Introductionmentioning

confidence: 99%

One-Pot, In-Situ Synthesis of 8-Armed Poly(Ethylene Glycol)-Coated Ag Nanoclusters as a Fluorescent Sensor for Selective Detection of Cu2+

Zhang

Wei

et al. 2020

Biosensors

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Fluorescent nanomaterials, such as quantum dots, have developed rapidly in recent years and have been significantly developed. Herein, we demonstrate a facile, one-pot, and in-situ synthesis strategy to obtain fluorescent silver nanoclusters (AgNCs) coated with eight-armed poly (ethylene glycol) polymers (8PEG-AgNCs) via a direct gel-mediated process. During the synthesis, ammonium (NH3) served as the crosslinker for the gel formation via a amine-type Michael addition reaction. This hydrogel can be used as a template to synthesize AgNCs using its volume-limiting effect. The in-situ generation of AgNCs takes place inside the nanocages of the formed gels, which guarantees the homogenous distribution of AgNCs in the gel matrix, as well as the efficient coating of PEG on the nanoclusters. After the degradation of gels, the released 8PEG-AgNCs nanohybrids showed strong blue fluorescence and exhibited long-term stability in aqueous solution for nearly one year. Results showed that the fabricated sensor revealed excellent fluorescent sensitivity for the selective detection of Cu2+ with a detection limit of 50 nM and a wide linear detection range of 5–100 μM. It is proposed that the greater cross-linking density leads to smaller gel pores and allows the synthesis of AgNCs with fluorescent properties. These results indicate that this novel hydrogel with certain biodegradation has the potential to be applied as a fluorescent sensor for catalytic synthesis, fluorescence tracing in cells, and fluorescence detection fields. Meanwhile, the novel design principle has a certain versatility to accelerate the development and application of other kinds of metal nanoclusters and quantum dots.

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Reduced Graphene Oxide-Based Double Network Polymeric Hydrogels for Pressure and Temperature Sensing

Cited by 23 publications

References 37 publications

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Wearable Sensor System to Monitor Physical Activity and the Physiological Effects of Heat Exposure

One-Pot, In-Situ Synthesis of 8-Armed Poly(Ethylene Glycol)-Coated Ag Nanoclusters as a Fluorescent Sensor for Selective Detection of Cu2+

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