{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:56:41Z","timestamp":1790791001788,"version":"4.1.0"},"reference-count":30,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:00:00Z","timestamp":1790467200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:00:00Z","timestamp":1790467200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"publisher","award":["RS\u20102024\u201000349451"],"award-info":[{"award-number":["RS\u20102024\u201000349451"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Science"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>The fabrication of microscale cracks on flexible substrates is a crucial step for potential applications such as human\u2013machine interfaces, biosignal analysis, and structural health monitoring. However, existing crack fabrication methods predominantly rely on externally applied mechanical stimuli such as stretching or bending, which limits the freedom with which cracks can form in terms of their location, density, and geometry. In this study, we introduce a bio\u2010inspired internal stress engineering strategy that enables tunable microscale cracks to be driven by internal stress induced through microsphere expansion. Microscale cracks can be reproducibly formed by exploiting the localized stress concentration and thickness\u2010dependent mechanical property transition of an ultrathin metal film. The crack\u2010based strain sensor exhibits an ultrahigh sensitivity of 24\u00a0320 at a strain of 1.6%. The proposed strategy demonstrates excellent sensing performance under both static and dynamic loading conditions, including high repeatability and frequency stability, demonstrating its considerable potential for practical sensing applications. Further, we demonstrate its applicability in wearable sensors for real\u2010time physiological monitoring and structural health monitoring of aircraft structures to verify its versatility across diverse industrial fields.<\/jats:p>","DOI":"10.1002\/advs.77961","type":"journal-article","created":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T18:00:31Z","timestamp":1790532031000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bio\u2010Inspired Internal Stress Engineering for Microscale Surface Cracking in Sensitive Strain Sensors"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-4448-6119","authenticated-orcid":false,"given":"Jae Yeong","family":"Jang","sequence":"first","affiliation":[{"name":"Major of Mechanical Engineering Pukyong National University  Busan Republic of Korea"},{"name":"Department of Intelligent Robot Engineering Pukyong National University  Busan Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanchul","family":"Cho","sequence":"additional","affiliation":[{"name":"Precision Mechanical Process and Control R&amp;D Group Korea Institute of Industrial Technology Busan Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8114-5153","authenticated-orcid":false,"given":"Young","family":"Jung","sequence":"additional","affiliation":[{"name":"Major of Mechanical Engineering Pukyong National University  Busan Republic of Korea"},{"name":"Department of Intelligent Robot Engineering Pukyong National University  Busan Republic of 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