Multifunctional Epidermal Electronics Printed Directly Onto the Skin

Yeo, Woon‐Hong; Kim, Yun-Soung; Lee, Jongwoo; Ameen, Abid; Shi, Luke; Li, Ming; Wang, Shuodao; Ma, Rui; Jin, Sung Hun; Kang, Zhan; Huang, Y.; Li, Jinghua

doi:10.1002/adma.201204426

Cited by 737 publications

(687 citation statements)

References 14 publications

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“…3b) and lower (by B1,000, shown in Fig. 3c), respectively, than those of silicones (Ecoflex, polydimethylsiloxane (PDMS) and Solaris) previously used in stretchable electronics 6 . Without the strainlimiting, stretchable fabric, however, these same favorable properties in the UL-Sil would render it impractical as a platform for the electronics.…”

Section: Resultsmentioning

confidence: 87%

“…These systems softly laminate onto the epidermis to yield highly functional, cutaneous interfaces that are mechanically, thermally and chemically 'invisible' to the user 5,6 with potential for use outside of hospitals and traditional laboratory settings. Opportunities in seamless, continuous assessment of health/ wellness, advanced function in wound monitoring/care and human-machine control systems motivate research in this field 7,8 .…”

mentioning

confidence: 99%

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Rugged and breathable forms of stretchable electronics with adherent composite substrates for transcutaneous monitoring

et al. 2014

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Section: Resultsmentioning

confidence: 87%

mentioning

confidence: 99%

Rugged and breathable forms of stretchable electronics with adherent composite substrates for transcutaneous monitoring

et al. 2014

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“…Separate adhesives were not needed to bond the devices to the skin. The adhesion strength was measured using a digital force metre (Mark-10, USA), using the following procedures 46 : the wrist was secured and the device substrate was connected to a force metre. The device was peeled away at a maximum speed of 1,000 mm min À 1 in an upward direction, parallel to the width of the device, at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Conformable amplified lead zirconate titanate sensors with enhanced piezoelectric response for cutaneous pressure monitoring

et al. 2014

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The ability to measure subtle changes in arterial pressure using devices mounted on the skin can be valuable for monitoring vital signs in emergency care, detecting the early onset of cardiovascular disease and continuously assessing health status. Conventional technologies are well suited for use in traditional clinical settings, but cannot be easily adapted for sustained use during daily activities. Here we introduce a conformal device that avoids these limitations. Ultrathin inorganic piezoelectric and semiconductor materials on elastomer substrates enable amplified, low hysteresis measurements of pressure on the skin, with high levels of sensitivity (B0.005 Pa) and fast response times (B0.1 ms). Experimental and theoretical studies reveal enhanced piezoelectric responses in lead zirconate titanate that follow from integration on soft supports as well as engineering behaviours of the associated devices. Calibrated measurements of pressure variations of blood flow in near-surface arteries demonstrate capabilities for measuring radial artery augmentation index and pulse pressure velocity.

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“…E lectronic devices and sensors that exhibit large amounts of mechanical deformability have many applications in smart wallpapers 1,2 , physiological body sensors [3][4][5][6][7] , and humanmachine interfaces for prosthetics [8][9][10] and robotics [11][12][13][14] . In this regard, tremendous advancements have been made in engineering solid-state electronic materials and devices on elastic substrates 1,6,9,10,[15][16][17][18][19][20][21][22] .…”

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confidence: 99%

Highly deformable liquid-state heterojunction sensors

Ota¹,

Chen²,

Lin³

et al. 2014

Nat Commun

228

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Mechanically deformable devices and sensors enable conformal coverage of electronic systems on curved and soft surfaces. Sensors utilizing liquids confined in soft templates as the sensing component present the ideal platform for such applications, as liquids are inherently more deformable than solids. However, to date, liquid-based devices have been limited to metal lines based on a single-liquid component given the difficulty in the fabrication of liquidbased junctions due to intermixing. Here, we demonstrate a robust platform for the fabrication of liquid-liquid 'heterojunction' devices, presenting an important advancement towards the realization of liquid-state electronic systems. The device architecture and fabrication scheme we present are generic for different sensing liquids, enabling demonstration of sensors responsive to different stimuli. As a proof of concept, we demonstrate temperature, humidity and oxygen sensors by using different ionic liquids, exhibiting high sensitivity with excellent mechanical deformability arising from the inherent property of the liquid phase.

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Multifunctional Epidermal Electronics Printed Directly Onto the Skin

Cited by 737 publications

References 14 publications

Rugged and breathable forms of stretchable electronics with adherent composite substrates for transcutaneous monitoring

Rugged and breathable forms of stretchable electronics with adherent composite substrates for transcutaneous monitoring

Conformable amplified lead zirconate titanate sensors with enhanced piezoelectric response for cutaneous pressure monitoring

Highly deformable liquid-state heterojunction sensors

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