Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202100150
Keywords
asymmetrical films; human pulse diagnosis; resistive pressure sensors; silk fibroin; wireless
Categories
Funding
- National Natural Science Foundation of China [12074322]
- 111 project [B16029]
- Doctoral Fund of the Ministry of Education [20130121110018]
- Science and Technology Project of Xiamen City [3502Z20183012]
- Science and Technology Planning Project of Guangdong Province [2018B030331001]
- Shenzhen Science and technology plan project [JCYJ20180504170208402]
- China Scholarship Council
- National Key R&D Program of China [2016YFC0802802]
- NUS AcRF Tier 1 [R-144-000-367-114]
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This study introduces a unique strategy of mesoscopic functionalization starting from silk fibroin materials to fabricate meso flexible SF electronic skin. By incorporating wool keratin and carbon nanotubes into the mesostructures of silk fibroin, the cocoon silk demonstrated robust mechanical and electric performance, showing a tunable sensitivity for passive wireless e-skin monitoring human subject pulses and evaluating blood vessel hardening and real-time blood pressure.
A unique strategy of mesoscopic functionalization starting from silk fibroin (SF) materials to the fabrication of meso flexible SF electronic skin (e-skin) is presented. Notably, SF materials of novel and enhanced properties of the materials can be achieved by mesoscopically reconstructing the hierarchical structures of SF materials, based on rerouting the refolding process of SF molecules by meso-nucleation templating. Mesoscopic hybridization/reconstruction endows cocoon silk with a robust mechanical and electric performance by incorporating wool keratin (WK) and carbon nanotubes (CNTs) into the mesostructures of SF via intermolecular templated nucleation. Furthermore, the asymmetrical meso-functional films with biocompatibility and insulation on one side and conductivity on the other (square resistance = 130 omega sq(-1)) endow the passive wireless e-skin exhibited a tunable sensitivity from -1.05 to -6.35 kPa(-1) with a lossless measurement range of approximate to 2 kPa. The pulses of human subjects are monitored using the e-skin to evaluate blood vessel hardening and real-time dynamic systolic and diastolic blood pressure.
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