{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,28]],"date-time":"2026-01-28T12:40:09Z","timestamp":1769604009619,"version":"3.49.0"},"reference-count":44,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2024,7,19]],"date-time":"2024-07-19T00:00:00Z","timestamp":1721347200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Science and Technology Research Program of Chongqing Municipal Education Commission","award":["KJQN202100203"],"award-info":[{"award-number":["KJQN202100203"]}]},{"name":"Science and Technology Research Program of Chongqing Municipal Education Commission","award":["X202410635278"],"award-info":[{"award-number":["X202410635278"]}]},{"name":"Southwest University Municipal Training Program of Innovation and Entrepreneurship for Undergraduates","award":["KJQN202100203"],"award-info":[{"award-number":["KJQN202100203"]}]},{"name":"Southwest University Municipal Training Program of Innovation and Entrepreneurship for Undergraduates","award":["X202410635278"],"award-info":[{"award-number":["X202410635278"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Microstructures have been proved as crucial factors for the sensing performance of flexible pressure sensors. In this study, polypyrrole (PPy)\/sunflower pollen (SFP) (P\/SFP) was prepared via the in situ growth of PPy on the surface of degreased SFP with a sea urchin-like microstructure; then, these P\/SFP microspheres were sprayed onto a flat silk cocoon (FSC) to prepare a sensing layer P\/SFP-FSC. PPy-FSC (P-FSC) was prepared as an electrode layer through the in situ polymerization of PPy on the FSC surface. The sensing layer P\/SFP-FSC was placed between two P-FSC electrode layers to assemble a P\/SFP-FSC pressure sensor together with a fork finger electrode. With 6 mg\/cm2 of optimized sprayed P\/SFP microspheres, the prepared flexible pressure sensor has a sensitivity of up to 0.128 KPa\u22121 in the range of 0\u201313.18 KPa and up to 0.13 KPa\u22121 in the range of 13.18\u201330.65 KPa, a fast response\/recovery time (90 ms\/80 ms), and a minimum detection limit as low as 40 Pa. This fabricated flexible P\/SFP-FSC sensor can monitor human motion and can also be used for the encrypted transmission of important information via Morse code. In conclusion, the developed flexible P\/SFP-FSC pressure sensor based on microstructure modification in this study shows good application prospects in the field of human\u2013computer interaction and wearable electronic devices.<\/jats:p>","DOI":"10.3390\/s24144698","type":"journal-article","created":{"date-parts":[[2024,7,19]],"date-time":"2024-07-19T15:15:19Z","timestamp":1721402119000},"page":"4698","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Pollen-Modified Flat Silk Cocoon Pressure Sensors for Wearable Applications"],"prefix":"10.3390","volume":"24","author":[{"given":"Shengnan","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China"},{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yujia","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China"},{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yi","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China"},{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiaqi","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China"},{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fan","family":"Liu","sequence":"additional","affiliation":[{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0215-2177","authenticated-orcid":false,"given":"Fangyin","family":"Dai","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China"},{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"},{"name":"Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiashen","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Materials, The University of Manchester, Manchester M13 9PL, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhi","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China"},{"name":"Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China"},{"name":"Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400715, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1016\/j.nanoen.2017.04.015","article-title":"High-performance, flexible electronic skin sensor incorporating natural microcapsule actuators","volume":"36","author":"Wang","year":"2017","journal-title":"Nano Energy"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"131","DOI":"10.1007\/s40820-022-00875-9","article-title":"An all-in-one multifunctional touch sensor with carbon-based gradient resistance elements","volume":"14","author":"Wei","year":"2022","journal-title":"Nano-Micro Lett."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"60531","DOI":"10.1021\/acsami.1c22001","article-title":"Wearable pressure sensors based on mxene\/tissue papers for wireless human health monitoring","volume":"13","author":"Yang","year":"2021","journal-title":"ACS Appl. 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