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dc.contributor.authorLi, Qingsongen_US
dc.contributor.authorChen, Gengen_US
dc.contributor.authorCui, Yajingen_US
dc.contributor.authorJi, Shaoboen_US
dc.contributor.authorLiu, Zhiyuanen_US
dc.contributor.authorWan, Changjinen_US
dc.contributor.authorLiu, Yupingen_US
dc.contributor.authorLu, Yehuen_US
dc.contributor.authorWang, Changxianen_US
dc.contributor.authorZhang, Nanen_US
dc.contributor.authorCheng, Yuanen_US
dc.contributor.authorZhang, Ke-Qinen_US
dc.contributor.authorChen, Xiaodongen_US
dc.identifier.citationLi, Q., Chen, G., Cui, Y., Ji, S., Liu, Z., Wan, C., Liu, Y., Lu, Y., Wang, C., Zhang, N., Cheng, Y., Zhang, K. & Chen, X. (2021). Highly thermal-wet comfortable and conformal silk-based electrodes for on-skin sensors with sweat tolerance. ACS Nano, 15(6), 9955-9966.
dc.description.abstractNoninvasive and seamless interfacing between the sensors and human skin is highly desired for wearable healthcare. Thin-film-based soft and stretchable sensors can to some extent form conformal contact with skin even under dynamic movements for high-fidelity signals acquisition. However, sweat accumulation underneath these sensors for long-term monitoring would compromise the thermal-wet comfort, electrode adherence to the skin, and signal fidelity. Here, we report the fabrication of a highly thermal-wet comfortable and conformal silk-based electrode, which can be used for on-skin electrophysiological measurement under sweaty conditions. It is realized through incorporating conducting polymers poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) into glycerol-plasticized silk fiber mats. Glycerol plays the role of tuning the mechanical properties of silk fiber mats and enhancing the conductivity of PEDOT:PSS. Our silk-based electrodes show high stretchability (>250%), low thermal insulation (∼0.13 °C·m2·W-1), low evaporative resistance (∼23 Pa·m2·W-1, 10 times lower than ∼1.3 mm thick commercial gel electrodes), and high water-vapor transmission rate (∼117 g·m-2·h-1 under sweaty conditions, 2 times higher than skin water loss). These features enable a better electrocardiography signal quality than that of commercial gel electrodes without disturbing the heat dissipation during sweat evaporation and provide possibilities for textile integration to monitor the muscle activities under large deformation. Our glycerol-plasticized silk-based electrodes possessing superior physiological comfortability may further engage progress in on-skin electronics with sweat tolerance.en_US
dc.description.sponsorshipAgency for Science, Technology and Research (A*STAR)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relationNRF-NRFI2017- 07en_US
dc.relation.ispartofACS Nanoen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
dc.titleHighly thermal-wet comfortable and conformal silk-based electrodes for on-skin sensors with sweat toleranceen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.researchInnovative Centre for Flexible Devicesen_US
dc.contributor.researchMax Planck-NTU Joint Lab for Artificial Sensesen_US
dc.description.versionSubmitted/Accepted versionen_US
dc.subject.keywordsSilk Fibroinen_US
dc.subject.keywordsElectrospinning Fiber Matsen_US
dc.description.acknowledgementX.C. would like to thank the financial support from the National Research Foundation, Prime Minister’s office, Singapore, under its NRF Investigatorship (NRF-NRFI2017- 07) and Agency for Science, Technology and Research (A*STAR) under its AME Programmable Funding Scheme (project no. A18A1b0045). K.-Q.Z. acknowledges the financial support from the National Key Research and Development Program of China (2017YFA0204600), the Natural Science Foundation of China (51873134), the Natural Science Foundation for Key Program of the Jiangsu Higher Education Institutions of China (17KJA540002). Y.C. and N.Z. are grateful for the support from the Agency for Science, Technology and Research (A*STAR) and the use of A*STAR Computational Resource Centre, Singapore (ACRC) and National Supercomputing Centre, Singapore (NSCC). Q.L. acknowledges the financial support from the China Scholarship Council (No. 201706920057).en_US
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