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Geometry-Assisted Three-Dimensional Superlocalization Imaging of Single-Molecule Catalysis on Modular Multilayer Nanocatalysts

TitleGeometry-Assisted Three-Dimensional Superlocalization Imaging of Single-Molecule Catalysis on Modular Multilayer Nanocatalysts
Publication TypeJournal Article
Year of Publication2014
AuthorsHan, R, Ha, JW, Xiao, CX, Pei, YC, Qi, ZY, Dong, B, Bormann, NL, Huang, WK, Fang, N
JournalAngewandte Chemie-International Edition
Volume53
Pagination12865-12869
Date Published11
Type of ArticleArticle
ISBN Number1433-7851
Accession NumberWOS:000344793400034
Keywordscarbon nanotubes, core-shell nanocatalysts, crystal surfaces, dehydrogenation, electron, fluorescence microscopy, Heterogeneous catalysis, in-situ, mesoporous silica, multilayer nanocatalysts, nanocrystals, platinum, propane, reactivity, silica, three-dimensional imaging
Abstract

To establish the structure-catalytic property relationships of heterogeneous catalysts, a detailed characterization of the three-dimensional (3D) distribution of active sites on a single catalyst is essential. Single-particle catalysis of a modular multilayer catalytic platform that consists of a solid silica core, a mesoporous silica shell, and uniformly distributed Pt nanoparticles sandwiched in between these layers is presented. The first 3D high-resolution super-localization imaging of single fluorescent molecules produced at active sites on the core-shell model nanocatalysts is demonstrated. The 3D mapping is aided by the well-defined geometry and a correlation study in scanning electron microscopy and total internal reflection fluorescence and scattering microscopy. This approach can be generalized to study other nano- and mesoscale structures.

DOI10.1002/anie.201407140
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