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Ultrasensitive mechanical crack-based sensor inspired by the spider sensory system

Nature volume 516, pages 222–226 (2014)Cite this article

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Abstract

Recently developed flexible mechanosensors based on inorganic silicon1,2,3, organic semiconductors4,5,6, carbon nanotubes7, graphene platelets8, pressure-sensitive rubber9 and self-powered devices10,11 are highly sensitive and can be applied to human skin. However, the development of a multifunctional sensor satisfying the requirements of ultrahigh mechanosensitivity, flexibility and durability remains a challenge. In nature, spiders sense extremely small variations in mechanical stress using crack-shaped slit organs near their leg joints12. Here we demonstrate that sensors based on nanoscale crack junctions and inspired by the geometry of a spider’s slit organ can attain ultrahigh sensitivity and serve multiple purposes. The sensors are sensitive to strain (with a gauge factor of over 2,000 in the 0–2 per cent strain range) and vibration (with the ability to detect amplitudes of approximately 10 nanometres). The device is reversible, reproducible, durable and mechanically flexible, and can thus be easily mounted on human skin as an electronic multipixel array. The ultrahigh mechanosensitivity is attributed to the disconnection–reconnection process undergone by the zip-like nanoscale crack junctions under strain or vibration. The proposed theoretical model is consistent with experimental data that we report here. We also demonstrate that sensors based on nanoscale crack junctions are applicable to highly selective speech pattern recognition and the detection of physiological signals. The nanoscale crack junction-based sensory system could be useful in diverse applications requiring ultrahigh displacement sensitivity.

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Figure 1: Schematic illustrations and images of an ultra-mechanosensitive nanoscale crack junction-based sensor inspired by the spider sensory system.
Figure 2: Resistance variations with strain and the multipixel array of the crack sensor.
Figure 3: Nanoscale crack junction-based sensor applications for sound and speech pattern recognition, human physiology monitoring and flow rate indicators.
Figure 4: Theoretical analysis of the nanoscale crack sensor.

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References

  1. Kim, D.-H. et al. Epidermal electronics. Science 333, 838–843 (2011)

    Article  CAS  ADS  Google Scholar 

  2. Takei, K. et al. Nanowire active-matrix circuitry for low-voltage macroscale artificial skin. Nature Mater. 9, 821–826 (2010)

    Article  CAS  ADS  Google Scholar 

  3. Kim, D.-H., Lu, N., Huang, Y. & Rogers, J. A. Materials for stretchable electronics in bioinspired and biointegrated devices. MRS Bull. 37, 226–235 (2012)

    Article  CAS  Google Scholar 

  4. Kaltenbrunner, M. et al. An ultra-lightweight design for imperceptible plastic electronics. Nature 499, 458–463 (2013)

    Article  CAS  ADS  Google Scholar 

  5. Chortos, A. et al. Highly stretchable transistors using a microcracked organic semiconductor. Adv. Mater. 26, 4253–4259 (2014)

    Article  CAS  Google Scholar 

  6. Someya, T. et al. A large-area, flexible pressure sensor matrix with organic field-effect transistors for artificial skin applications. Proc. Natl Acad. Sci. USA 101, 9966–9970 (2004)

    Article  CAS  ADS  Google Scholar 

  7. Yamada, T. et al. A stretchable carbon nanotube strain sensor for human-motion detection. Nature Nanotechnol. 6, 296–301 (2011)

    Article  CAS  ADS  Google Scholar 

  8. Li, X. et al. Stretchable and highly sensitive graphene-on-polymer strain sensors. Sci. Rep. 2, 870 (2012)

    Article  Google Scholar 

  9. Mannsfeld, S. C. et al. Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers. Nature Mater. 9, 859–864 (2010)

    Article  CAS  ADS  Google Scholar 

  10. Wang, Z. L. Self-powered nanosensors and nanosystems. Adv. Mater. 24, 280–285 (2012)

    Article  CAS  Google Scholar 

  11. Wu, W., Wen, X. & Wang, Z. L. Taxel-addressable matrix of vertical-nanowire piezotronic transistors for active and adaptive tactile imaging. Science 340, 952–957 (2013)

    Article  CAS  ADS  Google Scholar 

  12. Fratzl, P. & Barth, F. G. Biomaterial systems for mechanosensing and actuation. Nature 462, 442–448 (2009)

    Article  CAS  ADS  Google Scholar 

  13. Hößl, B., Böhm, H., Rammerstorfer, F., Müllan, R. & Barth, F. Studying the deformation of arachnid slit sensilla by a fracture mechanical approach. J. Biomech. 39, 1761–1768 (2006)

    Article  Google Scholar 

  14. Choi, S.-J., Yoo, P. J., Baek, S. J., Kim, T. W. & Lee, H. H. An ultraviolet-curable mold for sub-100-nm lithography. J. Am. Chem. Soc. 126, 7744–7745 (2004)

    Article  CAS  Google Scholar 

  15. Nam, K. H., Park, I. H. & Ko, S. H. Patterning by controlled cracking. Nature 485, 221–224 (2012)

    Article  CAS  ADS  Google Scholar 

  16. Kim, B. C. et al. Guided fracture of films on soft substrates to create micro/nano-feature arrays with controlled periodicity. Sci. Rep. 3, 3027 (2013)

    Article  Google Scholar 

  17. Vandeparre, H., Liu, Q., Minev, I. R., Suo, Z. & Lacour, S. P. Localization of folds and cracks in thin metal films coated on flexible elastomer foams. Adv. Mater. 25, 3117–3121 (2013)

    Article  CAS  Google Scholar 

  18. Livne, A., Bouchbinder, E., Svetlizky, I. & Fineberg, J. The near-tip fields of fast cracks. Science 327, 1359–1363 (2010)

    Article  MathSciNet  CAS  ADS  Google Scholar 

  19. Thouless, M., Li, Z., Douville, N. & Takayama, S. Periodic cracking of films supported on compliant substrates. J. Mech. Phys. Solids 59, 1927–1937 (2011)

    Article  CAS  ADS  Google Scholar 

  20. Bronkhorst, A. W. The cocktail party phenomenon: a review of research on speech intelligibility in multiple-talker conditions. Acta Acust. United Acust. 86, 117–128 (2000)

    Google Scholar 

  21. Drury, W., Gokhale, A. M. & Antolovich, S. Effect of crack surface geometry on fatigue crack closure. Metall. Mater. Trans. A 26, 2651–2663 (1995)

    Article  Google Scholar 

  22. Lacour, S. P., Wagner, S., Huang, Z. & Suo, Z. Stretchable gold conductors on elastomeric substrates. Appl. Phys. Lett. 82, 2404–2406 (2003)

    Article  CAS  ADS  Google Scholar 

  23. Lacour, S. P., Jones, J., Wagner, S., Li, T. & Suo, Z. Stretchable interconnects for elastic electronic surfaces. Proc. IEEE 93, 1459–1467 (2005)

    Article  CAS  Google Scholar 

  24. Graz, I. M., Cotton, D. P. & Lacour, S. P. Extended cyclic uniaxial loading of stretchable gold thin-films on elastomeric substrates. Appl. Phys. Lett. 94, 071902 (2009)

    Article  ADS  Google Scholar 

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Acknowledgements

This work is dedicated to the late Kahp-Yang Suh, one of the great pioneers of biomimetics. We thank S. J. Kwon for discussion of the theoretical modelling, T. Shin and S. J. Kang for help in relation to speech pattern recognition, K. Park for high-speed camera recording, J.-Y. Lee for LabVIEW programming, J. S. Kim for computational analysis of the audio files, T. Lee for flexibility testing, J. H. Park for playing the violin, and Y. K. Song and J.-P. Kim for their comments about phonetics and spider slit organs, respectively. This work was supported by the Global Frontier R&D Program of the Center for Multiscale Energy Systems (grant nos 2011-0031561 and 2011-0031577) and the Basic Science Research Program (grant no. 2009-0083540), all funded by the National Research Foundation of Korea under the Ministry of Science, ICT and Future Planning and by grants IBS-R015-D1 and NRF-2013-R1A1A1061403 (T.-i.K.).

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Author notes

  1. Kahp-Yang Suh: Deceased.

Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 151-742, South Korea,

    Daeshik Kang, Peter V. Pikhitsa, Yong Whan Choi, Chanseok Lee, Sung Soo Shin, Linfeng Piao, Kahp-Yang Suh & Mansoo Choi

  2. Division of WCU Multiscale Mechanical Design, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, South Korea,

    Daeshik Kang, Kahp-Yang Suh & Mansoo Choi

  3. Center for Neuroscience Imaging Research (CNIR), Institute for Basic Science (IBS), Suwon 440-746, South Korea,

    Byeonghak Park & Tae-il Kim

  4. School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, South Korea,

    Byeonghak Park & Tae-il Kim

  5. Interdisciplinary Program of Bioengineering, Seoul National University, Seoul 151-742, South Korea,

    Kahp-Yang Suh

Authors
  1. Daeshik Kang
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Contributions

D.K., M.C., T.-i.K. and K.-Y.S. designed the experiments; D.K., Y.W.C., C.L., S.S.S., L.P. and B.P. performed the experiments; K.Y.S., T.-i.K. and M.C. led the work; P.V.P., D.K. and M.C. developed the theory; and D.K., P.V.P., M.C. and T.-i.K. wrote the paper.

Corresponding authors

Correspondence to Tae-il Kim or Mansoo Choi.

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The authors declare no competing financial interests.

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Supplementary Information

This file contains Supplementary Text, Supplementary Figures 1-24, Supplementary Table 1 and Supplementary References. (PDF 4570 kb)

Salut d’Amour

This video shows time dependent resistance variations measured by our sensor attached to the violin while ‘Salut d’Amour’ is played. They were converted into digital signals from which the real-time peak spectrogram was retrieved (shown in the bottom image of Figure 3c). (AVI 7896 kb)

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Kang, D., Pikhitsa, P., Choi, Y. et al. Ultrasensitive mechanical crack-based sensor inspired by the spider sensory system. Nature 516, 222–226 (2014). https://doi.org/10.1038/nature14002

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