Fingertip skin–inspired microstructured ferroelectric skins discriminate static/dynamic pressure and temperature stimuli

By Jonghwa Park, Marie Kim, Youngoh Lee, H. Lee, Hyunhyub Ko. Science Advances, 2015

839 citations recorded by the source corpus.

Fingertip skin-mimicking ferroelectric skins sensitively detect and discriminate static/dynamic pressure and temperature. In human fingertips, the fingerprint patterns and interlocked epidermal-dermal microridges play a critical role in amplifying and transferring tactile signals to various mechanoreceptors, enabling spatiotemporal perception of various static and dynamic tactile signals. Inspired by the structure and functions of the human fingertip, we fabricated fingerprint-like patterns and interlocked microstructures in ferroelectric films, which can enhance the piezoelectric, pyroelectric, and piezoresistive sensing of static and dynamic mechanothermal signals. Our flexible and microstructured ferroelectric skins can detect and discriminate between multiple spatiotemporal tactile stimuli including static and dynamic pressure, vibration, and temperature with high sensitivities. As proof-of-concept demonstration, the sensors have been used for the simultaneous monitoring of pulse pressure and temperature of artery vessels, precise detection of acoustic sounds, and discrimination of various surface textures. Our microstructured ferroelectric skins may find applications in robotic skins, wearable sensors, and medical diagnostic devices.

Subfields: Biomedical Engineering, Cognitive Neuroscience

View Paper: https://www.semanticscholar.org/paper/e6136fcde995d545a0adeabd8d5fb2885572411d

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Citations in the corpus

• Skin-inspired highly stretchable and conformable matrix networks for multifunctional sensing (2018, background): “Pressure sensing coupled with temperature (e.g., nanocomposites 32 , organic transistors 33 , thermoelectric 34 , or ferroelectric 35 materials), strain (e.g., carbon nanotubes 36 , gold thin fi lms 26 , or liquid conductors 37 in silicone rubber, interlocked micro/nanostructures 25,38,39 ,…”
• Soft magnetic skin for super-resolution tactile sensing with force self-decoupling (2021, background): “…sensors have been proposed for perception based on a wide variety of transduction principles—in-cluding capacitance ( 8 – 12 ), piezoresistance ( 13 – 19 ), optics ( 20 – 22 ), magnetics ( 23 – 25 ), giant magnetoresistance ( 26 , 27 ), and barometric pressure ( 28 ) (see Table 1)—within which…”
• Printed multifunctional flexible device with an integrated motion sensor for health care monitoring (2016, background): “Various material platforms and structures have been reported for health care monitoring devices (1), such as temperature sensors (2, 3), electrocardiogram (ECG) sensors (4, 5), heartbeat sensors (6, 7), chemical sensors (8, 9), and drug delivery systems (10, 11), and multifunctional sensing has been”