2015
DOI: 10.1002/adfm.201501590
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Miniaturized Flexible Electronic Systems with Wireless Power and Near‐Field Communication Capabilities

Abstract: A class of thin, lightweight, fl exible, near-fi eld communication (NFC) devices with ultraminiaturized format is introduced, and systematic investigations of the mechanics, radio frequency characteristics, and materials aspects associated with their optimized construction are presented. These systems allow advantages in mechanical strength, placement versatility, and minimized interfacial stresses compared to other NFC technologies and wearable electronics. Detailed experimental studies and theoretical modeli… Show more

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Cited by 159 publications
(111 citation statements)
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“…These changes in performance are caused by the deformation of the shape in the coil antenna, consistent with behaviors in circular copper antenna structures. 25,40 However, these characteristics do not have significant adverse effects on the operation of the wireless strain sensor using NFC, since the integrated NFC chip has a constant output voltage of 3.4 V. Only signals related to the resistance change (ΔR) of the sensor caused by the external strain loading are transmitted to the external reader as meaningful data.…”
Section: Resultsmentioning
confidence: 99%
“…These changes in performance are caused by the deformation of the shape in the coil antenna, consistent with behaviors in circular copper antenna structures. 25,40 However, these characteristics do not have significant adverse effects on the operation of the wireless strain sensor using NFC, since the integrated NFC chip has a constant output voltage of 3.4 V. Only signals related to the resistance change (ΔR) of the sensor caused by the external strain loading are transmitted to the external reader as meaningful data.…”
Section: Resultsmentioning
confidence: 99%
“…5 summarizes an example of extended use in a realistic scenario in which skin-mounted operation allows continuous monitoring of temperature during physical exercise. Here, the device laminates onto the forearm of a volunteer on a stationary bike; a separate, wirelessly powered NFC (SL13A, AMS) device (15) placed on an adjacent region of the arm collected data at a sampling rate of 1 point/1 min via NFC-equipped smartphone (Galaxy Note 4, Samsung) to provide a set of data as a control (Fig. 5A).…”
Section: Resultsmentioning
confidence: 99%
“…Many impressive examples of the utility of these concepts have emerged over the last several years, particularly in the area of biomedical devices, where work in skin-mounted technologies is now moving from laboratory demonstrations to devices with proven utility in human clinical studies (11,12) and even to recently launched commercial products (13). Although schemes in high-frequency or ultrahigh-frequency wireless power transfer satisfy requirements in many important contexts (14,15), opportunities remain for approaches in local generation and/or storage of power in ways that retain overall stretchable characteristics at the system level. Reported approaches to the former involve harvesting based on piezoelectric (16,17), triboelectric (18), and thermoelectric (19) effects; the latter includes batteries (20)(21)(22) and supercapacitors (23,24) enabled by various unusual materials.…”
mentioning
confidence: 99%
“…Up to now, huge efforts have been devoted to developing fl exible devices for different applications, such as tactile sensors, [ 3,4 ] molecular sensors and pH sensors, [ 5,6 ] actuators, [ 7,8 ] photodetectors, [ 9,10 ] solar cells, [ 11,12 ] piezoelectric and triboelectric nanogenerators, [ 13,14 ] and other fl exible systems. [ 15 ] However, such wearable and skin-like systems need to be selfpowered and the development of stretchable energy storage devices still remains very challenging.Following this target, fl exible supercapacitors have often been proposed in the past decade as a valuable alternative to standard capacitors and batteries. Supercapacitors feature a fast charge/discharge capacity, long lifecycle, wide range of operating temperatures, and safety.…”
mentioning
confidence: 99%