Highly stretchable metal-polymer hybrid conductors for wearable and self-cleaning sensors
Source abstract
Abstract
Abstract We fabricated semitransparent and stretchable hybrid Ag-polytetrafluoroethylene (PTFE) conductors on a polyurethane (PU) substrate for use in high-performance wearable and self-cleaning sensors. The highly conductive Ag metal and stretchable PTFE polymer matrix were cosputtered, embedding the self-formed Ag in the PTFE matrix. Depending on the cosputtering RF and DC power ratio, the Ag-PTFE conductors showed a sheet resistance of 3.09–17.23 Ω/square and an optical transparency of 25.27–38.49% at a wavelength of 550 nm. Under the optimal cosputtering conditions, the Ag-PTFE electrode showed outstanding stretchability (strain 20%) and reversible hysteresis, enabling the production of stretchable and semitransparent conductors. In addition, the very small critical inward/outward bending radius near 1 mm and the hydrophobic surface indicate that the Ag-PTFE films could also be applied in wearable and self-cleaning devices. The suitability of the high stretchability and low sheet resistance of the sputtered Ag-PTFE conductor was verified by using it as a stretchable interconnector for commercial ELs, LEDs, and strain sensors. We applied the Ag-PTFE film as a semitransparent conductor for stretchable touch panels and electromyography sensors. Cosputtered Ag-PTFE films are promising stretchable conductors for a variety of applications in next-generation wearable devices.
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Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Tactile and Sensory Interactions · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
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1. Wang, C. et al. Advanced carbon for flexible and wearable electronics. Adv. Mater. 31, 1801072 (2019).10.1002/adma.201801072 ↗
2. Hong, H. et al. Anisotropic thermal conductive composite by the guided assembly of boron nitride nanosheets for flexible and stretchable electronics. Adv. Funct. Mater. 29, 1902575 (2019).10.1002/adfm.201902575 ↗
3. Wei, P. et al. Flexible and stretchable electronic skin with high durability and shock resistance via embedded 3D printing technology for human activity monitoring and personal healthcare. Adv. Mater. Technol. 4, 1900315 (2019).10.1002/admt.201900315 ↗
4. Park, S. J. & Park, C. H. Suit-type wearable robot powered by shape-memory-alloy-based fabric muscle. Sci. Rep. 9, 9157 (2019).10.1038/s41598-019-45722-x ↗
5. Kim, Y. et al. Organic electrochemical transistor-based channel dimension-independent single-strand wearable sweat sensors. NPG Asia Mater. 10, 1086–1095 (2018).10.1038/s41427-018-0097-3 ↗
6. Zhang, C. et al. A stretchable dual-mode sensor array for multifunctional robotic electronic skin. Nano Energy 62, 164–170 (2019).10.1016/j.nanoen.2019.05.046 ↗
7. Herrmann, J. et al. Nanoparticle films as sensitive strain gauges. Appl. Phys. Lett. 91, 183105 (2007).10.1063/1.2805026 ↗
8. Pandey, M. et al. Dependence of ITO-coated flexible substrates in the performance and bending durability of perovskite solar cells. Adv. Eng. Mater. 21, 1900288 (2019).10.1002/adem.201900288 ↗
9. Zhong, Z. W., Tang, R. W. L., Chen, S. H. & Shan, X. C. A study of screen printing of stretchable circuits on polyurethane substrates. Microsyst. Technol. 25, 339–350 (2019).10.1007/s00542-018-3969-0 ↗
10. Lin, Y. et al. A highly stretchable and sensitive strain sensor based on graphene – elastomer composites with a novel double-interconnected network. J. Mater. Chem. C 4, 6345–6352 (2016).10.1039/C6TC01925K ↗
11. Kim, Y.-S. et al. All-in-one, wireless, stretchable hybrid electronics for smart, connected, and ambulatory physiological monitoring. Adv. Sci. 6, 1900939 (2019).10.1002/advs.201900939 ↗
12. Hwang, B.-U. et al. A transparent stretchable sensor for distinguishable detection of touch and pressure by capacitive and piezoresistive signal transduction. NPG Asia Mater. 11, 23 (2019).10.1038/s41427-019-0126-x ↗
13. Yang, C., Huang, Y., Cheng, H., Jiang, L. & Qu, L. Rollable, stretchable, and reconfigurable graphene hygroelectric generators. Adv. Mater. 31, 1805705 (2019).10.1002/adma.201805705 ↗
14. Zhang, R., Ding, J., Liu, C. & Yang, E.-H. Highly stretchable supercapacitors enabled by interwoven CNTs partially embedded in PDMS. ACS Appl. Energy Mater. 1, 2048–2055 (2018).10.1021/acsaem.8b00156 ↗
15. Park, S., Lee, H., Kim, Y.-J. & Lee, P. S. Fully laser-patterned stretchable microsupercapacitors integrated with soft electronic circuit components. NPG Asia Mater. 10, 959–969 (2018).10.1038/s41427-018-0080-z ↗
16. Tian, G. et al. Copolymer-enabled stretchable conductive polymer fibers. Polym. (Guildf.). 177, 189–195 (2019).10.1016/j.polymer.2019.06.002 ↗
17. Albrecht, A. et al. Over-stretching tolerant conductors on rubber films by inkjet-printing silver nanoparticles for wearables. Polymer 10, 1413 (2018).10.3390/polym10121413 ↗
18. Yadav, K., Jha, S., Jassal, M. & Agrawal, A. K. Internally coated highly conductive and stretchable AgNW-PU hollow fibers. Polymer 169, 46–51 (2019).10.1016/j.polymer.2019.02.035 ↗
19. Catenacci, M. J., Reyes, C., Cruz, M. A. & Wiley, B. J. Stretchable conductive composites from Cu-Ag nanowire felt. ACS Nano 12, 3689–3698 (2018).10.1021/acsnano.8b00887 ↗
20. Zhou, Y., Azumi, R. & Shimada, S. A highly durable, stretchable, transparent and conductive carbon nanotube–polymeric acid hybrid film. Nanoscale 11, 3804–3813 (2019).10.1039/C8NR08399A ↗
21. Fan, X. et al. A Transfer-printed, stretchable, and reliable strain sensor using PEDOT: PSS/Ag NW hybrid films embedded into elastomers. Adv. Mater. Technol. 3, 180030 (2018).10.1002/admt.201800030 ↗
22. Wang, Y., Zhang, L. & Wang, D. Ultrastretchable hybrid electrodes of silver nanowires and multiwalled carbon nanotubes realized by capillary- force-induced welding. Adv. Mater. Technol. 4, 1900721 (2019).10.1002/admt.201900721 ↗
23. Zhou, L.-y., Fu, J.-z., Gao, Q., Zhao, P. & He, Y. All-printed flexible and stretchable electronics with pressing or freezing activatable liquid-metal – silicone inks. Adv. Funct. Mater. 30, 1906683 (2019).10.1002/adfm.201906683 ↗
24. Woo, J. Y., Kim, K. K., Lee, J., Kim, J. T. & Han, C.-S. Highly conductive and stretchable Ag nanowire/carbon nanotube hybrid conductors. Nanotechnology 25, 285203 (2014).10.1088/0957-4484/25/28/285203 ↗
25. Montazerian, H. et al. Graphene-coated spandex sensors embedded into silicone sheath for composites health monitoring and wearable applications. Small 15, 1804991 (2019).10.1002/smll.201804991 ↗
26. Kim, S. H. et al. Fluorocarbon thin films fabricated using carbon nanotube/polytetrafluoroethylene composite polymer targets via mid-frequency sputtering. Sci. Rep. 7, 1451 (2017).10.1038/s41598-017-01472-2 ↗
27. Xi, Y., Kaper, H. J., Choi, C.-H. & Sharma, P. K. Tribological properties of microporous polydimethylsiloxane (PDMS) surfaces under physiological conditions. J. Colloid Interface Sci. 561, 220–230 (2020).10.1016/j.jcis.2019.11.082 ↗
28. Gao, Y. et al. Wettability of pear leaves from three regions characterized at different stages after flowering using the OWRK method. Pest Manag. Sci. 74, 1804–1809 (2018).10.1002/ps.4878 ↗
29. Kwok, D. Y., Li, D. & Neumann, A. W. Fowkes’ surface tension component approach revisited. Colloids Surf. A Physicochem. Eng. Asp. 89, 181–191 (1994).10.1016/0927-7757(94)80117-7 ↗
30. Sun, W.-J. et al. Highly conductive and stretchable carbon nanotube/thermoplastic polyurethane composite for wearable heater. Compos. Sci. Technol. 181, 107695 (2019).10.1016/j.compscitech.2019.107695 ↗
31. Zhai, Y. et al. Flexible and wearable carbon black/thermoplastic polyurethane foam with a pinnate-veined aligned porous structure for multifunctional piezoresistive sensors. Chem. Eng. J. 382, 122985 (2020).10.1016/j.cej.2019.122985 ↗
32. Xu, H. et al. Dual-mode wearable strain sensor based on graphene/colloidal crystal films for simultaneously detection of subtle and large human motions. Adv. Mater. Technol. 5, 1901056 (2020).10.1002/admt.201901056 ↗
33. Fuji, Y. et al. An ultrasensitive spintronic strain-gauge sensor and a spin-MEMS microphone. Electron Commun. Jpn. 102, 48–54 (2019).10.1002/ecj.12138 ↗
34. Cataldi, P. et al. Carbon nanofiber versus graphene-based stretchable capacitive touch sensors for artificial electronic skin. Adv. Sci. 5, 1700587 (2018).10.1002/advs.201700587 ↗
35. Shi, R., Lou, Z., Chen, S. & Shen, G. Flexible and transparent capacitive pressure sensor with patterned microstructured composite rubber dielectric for wearable touch keyboard application. Sci. China Mater. 61, 1587–1595 (2018).10.1007/s40843-018-9267-3 ↗
36. Chae, H. et al. Laser-processed nature-inspired deformable structures for breathable and reusable electrophysiological sensors toward controllable home electronic appliances and psychophysiological stress monitoring. ACS Appl. Mater. Interfaces 11, 28387–28396 (2019).10.1021/acsami.9b06363 ↗
37. Wang, Y., Hu, H., Shao, J. & Ding, Y. Fabrication of well-defined mushroom-shaped structures for biomimetic dry adhesive by conventional photolithography and molding. ACS Appl. Mater. Interfaces 6, 2213–2218 (2014).10.1021/am4052393 ↗
38. Yoo, J.-H., Park, J. B., Ahn, S. & Grigoropoulos, C. P. Laser-induced direct graphene patterning and simultaneous transferring method for graphene sensor platform. Small 9, 4269–4275 (2013).10.1002/smll.201300990 ↗
39. Chen, T. et al. Triboelectric self-powered wearable flexible patch as 3D motion control interface for robotic manipulator. ACS Nano 12, 11561–11571 (2018).10.1021/acsnano.8b06747 ↗
40. Li, X. & Sun, Y. A wearable button-like system for long-term multiple biopotential monitoring using non-contact electrodes. Smart Heal. 11, 2–15 (2019).10.1016/j.smhl.2018.09.001 ↗