title: Solid-State Conversion Chemistry of Multicomponent Nanocrystals Cast in a Hollow Silica Nanosphere: Morphology-Controlled Syntheses of Hybrid Nanocrystals.
abstract: During thermal transformation of multicomponent nanocrystals in a silica nanosphere, FeAuPd alloy nanocrystals migrate outward and thereby leave a cavity in the silica matrix. Oxidation then converts these nanocrystals back into phase-segregated hybrid nanocrystals, AuPd@Fe3O4, with various morphologies. The FeAuPd-to-AuPd@Fe3O4 transformation was cast by the in situ generated hollow silica mold. Therefore, the morphological parameters of the transformed AuPd@Fe3O4 are defined by the degree of migration of the FeAuPd in the hollow silica nanoshell. This hollow silica-cast nanocrystal conversion was studied to develop a solid state protocol that can be used to produce a range of hybrid nanocrystals and that allows for systematic and sophisticated control of the resulting morphologies.
authors.affiliation: Department of Chemistry, and ‡Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Gyeongbuk 790-784, Korea.
authors.forename: Yeon Jun
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Chemistry, and ‡Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Gyeongbuk 790-784, Korea.
authors.forename: Jung Kyu
authors.initials: JK
authors.lastname: Choi
authors.affiliation: Department of Chemistry, and ‡Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Gyeongbuk 790-784, Korea.
authors.forename: Dong-Gyu
authors.initials: DG
authors.lastname: Lee
authors.affiliation: Department of Chemistry, and ‡Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Gyeongbuk 790-784, Korea.
authors.forename: Kyungjoon
authors.initials: K
authors.lastname: Baek
authors.affiliation: Department of Chemistry, and ‡Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Gyeongbuk 790-784, Korea.
authors.forename: Sang Ho
authors.initials: SH
authors.lastname: Oh
authors.affiliation: Department of Chemistry, and ‡Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Gyeongbuk 790-784, Korea.
authors.forename: In Su
authors.initials: IS
authors.lastname: Lee
keywords: hollow nanoparticle; nanoparticles; nanoreactor; nanostructures; solid-state reactions