{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T02:55:32Z","timestamp":1792464932057,"version":"4.5.0"},"reference-count":39,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:00Z","timestamp":1790640000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:00Z","timestamp":1790640000000},"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","id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    High\u2010temperature nanocrystal (NC) transformations in porous silica (\n                    <jats:italic>p<\/jats:italic>\n                    SiO\n                    <jats:sub>2<\/jats:sub>\n                    ) are typically limited by densification, pore collapse, and sintering. We show that HVA\u2010enabled opens a distinct thermal window at 1000\u00b0Cwhere unusually preserved\n                    <jats:italic>p<\/jats:italic>\n                    SiO\n                    <jats:sub>2<\/jats:sub>\n                    confines metal species to gain sufficient mobility for NC\u2010alloying. Continuous removal of volatile SiO\n                    <jats:sub>x<\/jats:sub>\n                    and condensates suppresses viscous flow, enabling nanoscopic migratory solid\u2010state reactions inside intact\n                    <jats:italic>p<\/jats:italic>\n                    SiO\n                    <jats:sub>2<\/jats:sub>\n                    . Migration pathways are metal\u2010dependent: noble metals (Rh, Pd, Pt, Ru) diffuse inward to form concentric alloy NC, whereas non\u2010noble metals such as Fe, Co, and Ni proceed through transient silicide formation that drives outward NC migration, yielding an eccentric configuration via a melt\u2013migrate\u2013freeze mechanism. The resulting nanoreactors are compositionally tunable, thermally robust, and solution\u2010dispersible. Confinement\u2010programmed architectures generate catalytic microenvironments that tune activity and chemoselectivity across multiple hydrogenation reactions. HVA strategy converts migration from a high\u2010temperature failure mode into a controllable synthetic handle for designing functional confined alloys.\n                  <\/jats:p>","DOI":"10.1002\/smll.76004","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T05:57:11Z","timestamp":1790747831000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Thermal Migratory Alloying in Vacuum\u2010Stabilized Porous Silica Nanoreactor"],"prefix":"10.1002","author":[{"given":"Jeong Hun","family":"Choi","sequence":"first","affiliation":[{"name":"Center for Nanospace\u2010confined Chemical Reactions (NCCR) Pohang University of Science and Technology (POSTECH)  Pohang South Korea"},{"name":"Department of Chemistry Pohang University of Science and Technology (POSTECH)  Pohang South 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