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      Recent Progress in Wireless Sensors for Wearable Electronics

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          Abstract

          The development of wearable electronics has emphasized user-comfort, convenience, security, and improved medical functionality. Several previous research studies transformed various types of sensors into a wearable form to more closely monitor body signals and enable real-time, continuous sensing. In order to realize these wearable sensing platforms, it is essential to integrate wireless power supplies and data communication systems with the wearable sensors. This review article discusses recent progress in wireless technologies and various types of wearable sensors. Also, state-of-the-art research related to the application of wearable sensor systems with wireless functionality is discussed, including electronic skin, smart contact lenses, neural interfaces, and retinal prostheses. Current challenges and prospects of wireless sensor systems are discussed.

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          Wearable biosensors for healthcare monitoring

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            Flexible and Stretchable Physical Sensor Integrated Platforms for Wearable Human-Activity Monitoringand Personal Healthcare.

            Flexible and stretchable physical sensors that can measure and quantify electrical signals generated by human activities are attracting a great deal of attention as they have unique characteristics, such as ultrathinness, low modulus, light weight, high flexibility, and stretchability. These flexible and stretchable physical sensors conformally attached on the surface of organs or skin can provide a new opportunity for human-activity monitoring and personal healthcare. Consequently, in recent years there has been considerable research effort devoted to the development of flexible and stretchable physical sensors to fulfill the requirements of future technology, and much progress has been achieved. Here, the most recent developments of flexible and stretchable physical sensors are described, including temperature, pressure, and strain sensors, and flexible and stretchable sensor-integrated platforms. The latest successful examples of flexible and stretchable physical sensors for the detection of temperature, pressure, and strain, as well as their novel structures, technological innovations, and challenges, are reviewed first. In the next section, recent progress regarding sensor-integrated wearable platforms is overviewed in detail. Some of the latest achievements regarding self-powered sensor-integrated wearable platform technologies are also reviewed. Further research direction and challenges are also proposed to develop a fully sensor-integrated wearable platform for monitoring human activity and personal healthcare in the near future.
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              Wearable sweat sensors

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                Author and article information

                Journal
                Sensors (Basel)
                Sensors (Basel)
                sensors
                Sensors (Basel, Switzerland)
                MDPI
                1424-8220
                09 October 2019
                October 2019
                : 19
                : 20
                : 4353
                Affiliations
                [1 ]Nano Science Technology Institute, Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea; younggeun@ 123456wearablelab.net (Y.-G.P.); sangil@ 123456wearablelab.net (S.L.)
                [2 ]Center for Nanomedicine, Institute for Basic Science (IBS), Seoul 03722, Korea
                Author notes
                [* ]Correspondence: jang-ung@ 123456yonsei.ac.kr ; Tel.: +82-2-2123-2851
                [†]

                These authors contributed equally to this work.

                Author information
                https://orcid.org/0000-0003-1522-4958
                Article
                sensors-19-04353
                10.3390/s19204353
                6848938
                31600870
                da46f427-2a7c-4928-89a4-e61569efdade
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 28 August 2019
                : 01 October 2019
                Categories
                Review

                Biomedical engineering
                wireless sensors,wearable electronics,electronic skins,smart contact lenses,neural interfaces,retinal prostheses

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