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SCIENTIA SINICA Informationis, Volume 48, Issue 6: 605-625(2018) https://doi.org/10.1360/N112018-00106

Review of ultra-thin and skin-like solid electronics

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  • ReceivedApr 27, 2018
  • AcceptedMay 7, 2018
  • PublishedJun 13, 2018

Abstract

Directly integrating the flexible and stretchable electronics with the humanbody has become a developing trend that is promising in healthcare. Skin-like flexible electronics that can seamlessly produce soft and conformalcontact with the human body are of large significance for clinicaldiagnosis, therapy, and human-machine interfacing, as well as for the sensingfunction of robots and so on. Here, we review on the recent progress offlexible and skin-like solid electronics with specific emphasis on theapplication in the long-term and continuous monitoring of basic humanphysical parameters, such as body temperature, surficial strain, bloodoxygen, and blood glucose, as well as energy harvesting. Along with the rapiddevelopment in big data and artificial intelligence, flexible and skin-likesolid electronics are believed to play an important role in human liferesearch and medical applications.


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  • Figure 1

    (Color online) Flexible electronics and their applications on human body

  • Figure 2

    (Color online) The functions of skin-like solid electronics

  • Figure 3

    (Color online) The skin-like temeprature sensor's illustration [40]@Copyright 2015 Macmillan Publishers Ltd.

  • Figure 4

    (Color online) The scanning electron microscope image of the semi-permeable film. (a) The side view; (b) the surfacial micro-porous structure; (c) the micro-porous structure in the side view [40]@Copyright 2015 Macmillan Publishers Ltd.

  • Figure 5

    (Color online) The long-term wearing test. (a) is wearing the device, and the inset is the device picture;protect łinebreak (b) is the skin after removing the device, and the inset is the functional layer of the removed device [40]@Copyright 2015 Macmillan Publishers Limited

  • Figure 6

    (Color online) The temperature device for core body temperature measurement. (a) The explosive view of the device; (b) the device photo; (c) wearing the device on the forehead [41]@Copyright 2016 John Wiley and Sons

  • Figure 7

    (Color online) The core body temperature sensor based on porous isolator. (a) Photo of the device; (b) scanning electron microscope image of the device; (c) the device being bent [41]@Copyright 2016 John Wiley and Sons

  • Figure 8

    (Color online) The blood flow meter. (a) The illustration of the device structure; (b) the photo of device wear-protect łinebreak ing [42]@Copyright 2015 American Association for the Advancement of Science

  • Figure 9

    (Color online) The surfacial temperature field under the influence of the blood flow. (a) The measured temperature distribution; (b) the temperature distribution after removing the ceter heating [42]@Copyright 2015 American Association for the Advancement of Science

  • Figure 10

    (Color online) Skin-like strain sensor's illustration and wearing photos [48]@Copyright 2016 IEEE

  • Figure 11

    (Color online) The pulse signal monitored by the skin-like strain sensor [48]@Copyright 2016 IEEE

  • Figure 12

    (Color online) The micro-structured dielectric layer of the pressure sensor [50,51]@Copyright 2015 Materials Research Society, 2014 John Wiley and Sons

  • Figure 13

    (Color online) The pressure sensor with multi-level micro-structure (a), and its response to pressure (b) [52]@Copyright 2014 John Wiley and Sons

  • Figure 14

    (Color online) The pressure sensor with micro-structure and its application in measuring the pulse [53]@Copyright 2015 John Wiley and Sons

  • Figure 15

    (Color online) The illustration of electrochemical twin channels measuring prinple. The photo of the skin-like flexible glucose biosensor (a) attached to the skin (b) [63]@Copyright 2017 American Association for the Advancement of Science

  • Figure 16

    (Color online) Results of the clinical trials conduceted with skin-like blood glucose monitoring system and the finger-pricking glucometer [63]@Copyright 2017 American Association for the Advancement of Science

  • Figure 17

    (Color online) The illustration of blood oxygen measuring principle [64]@Copyright 2017 John Wiley and Sons

  • Figure 18

    (Color online) The structure of the skin-like blood oxygen sensor. (a) The 3D illstration and (b) the cross section [64]@Copyright 2017 John Wiley and Sons

  • Figure 19

    (Color online) The signal obtained by the skin-like blood oxygen sensor [64]@Copyright 2017 John Wiley and Sons

  • Figure 20

    (Color online) The structure of the ultra-flexible energy harvester. (a) Explosive view; (b) cross section view; (c) illustration of a single nano-ribbon; (d) the array of the nano-ribbons and their gold interconnects (zoom in)

  • Figure 21

    (Color online) Photo of the ultra-flexible energy harvester

  • Figure 22

    (Color online) The photos of the in vivo testing of the device in different points of a cardiac cycle [7]@Copyright 2015 Macmillan Publishers Limited

  • Figure 23

    (Color online) The signal from the in vivo testing; the electric circuit diagram of the energy transformation (the upper left); the commercial LED has been illuminated by the energy harvesting (the upper right) [7]@Copyright 2015 Macmillan Publishers Ltd.

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