Tactile-Direction-Sensitive and Stretchable Electronic Skins Based on Human-Skin-Inspired Interlocked Microstructures
Abstract
Stretchable electronic skins with multidirectional force-sensing capabilities are of great importance in robotics, prosthetics, and rehabilitation devices. Inspired by the interlocked microstructures found in epidermal-dermal ridges in human skin, piezoresistive interlocked microdome arrays are employed for stress-direction-sensitive, stretchable electronic skins. Here we show that these arrays possess highly sensitive detection capability of various mechanical stimuli including normal, shear, stretching, bending, and twisting forces. Furthermore, the unique geometry of interlocked microdome arrays enables the differentiation of various mechanical stimuli because the arrays exhibit different levels of deformation depending on the direction of applied forces, thus providing different sensory output patterns. In addition, we show that the electronic skins attached on human skin in the arm and wrist areas are able to distinguish various mechanical stimuli applied in different directions and can selectively monitor different intensities and directions of air flows and vibrations.
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A multifunctional sensor with interlocked microdome arrays exhibited a pressure sensitivity of 15.1 kPa-1, a shear-force sensitivity of 2.21 N-1 under a normal pressure of 65 Pa, and ultrahigh sensitivity to tensile strain (27.8 for strain of 0-40%, 1084 for 40-90%, and 9617 for 90-120%).
“the multifunctional sensor with interlocked microdome arrays (Figure 5a) exhibited a pressure sensitivity of 15.1 kPa -1 , [141] a shear-force sensitivity of 2.21 N -1 under a normal pressure of 65 Pa and a ultrahigh sensitivity to tensile strain (i.e., 27.8 for strain of 0-40%, 1084 for 40-90%, and 9617 for 90-120%).[144]”
From Nanomaterial-Enabled Wearable Sensors for Healthcare (2018) · cites this paper as [144]
A multitude of pressure sensing arrays have been demonstrated to capture the spatial pressure distributions induced by different sources, such as a static object placed onto the sensing array, gas flow, bouncing of a water droplet, finger touch, and acoustic vibration.
“A multitude of pressure sensing arrays have been demonstrated to capture the spatial pressure distributions induced by different sources, such as a static object placed onto the sensing array, [57,139,141,158,203] gas flow, [141,144,153] bouncing of a water droplet (Figure 11a), [139] finger touch, [144,161] and acoustic vibration.[144,203]”
From Nanomaterial-Enabled Wearable Sensors for Healthcare (2018) · cites this paper as [144]
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- Authors
- Park, J., Lee, Y., Hong, J., Lee, Y., Ha, M., Jung, Y., Lim, H., Kim, S. Y., & Ko, H.
- Affiliations
- Ulsan National Institute of Science and Technology (KR)
- Korea Institute of Machinery & Materials (KR)
- Corresponding author
- Ko, Hyunhyub
- ORCID
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-11-18
- Volume
- 8
- Issue
- 12
- Pages
- 12020-12029
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W1979369614
- Cited by
- 649
- References
- 52
- Citations by year
- 2026: 34 · 2025: 37 · 2024: 64 · 2023: 73 · 2022: 61 · 2021: 72 · 2020: 77 · 2019: 73 · 2018: 55 · 2017: 48 · 2016: 36 · 2015: 19
- FWCI
- 17.83
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- ACS Nano (publishedVersion)
- PubMed (publishedVersion)
- Scholarworks@UNIST (Ulsan National Institute of Science and Technology) (submittedVersion)
- Funders
- Korea Institute of Machine & Materials (NK175B)
- National Research Foundation of Korea (NRF-2011-0014965, NRF-2012K1A3A1A20031618)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
- Keywords
- tactile sensing, force sensing, shear force detection, airflow sensing, vibration sensing, wearable sensors
- MeSH terms
- Skin, Stress, Mechanical, Touch, Biomimetics, Mechanical Phenomena, Electrical Equipment and Supplies
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