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Direct Imaging of ALD Deposited Pt Nanoclusters inside the Giant Pores of MIL‐101
Author(s) -
Meledina Maria,
Turner Stuart,
Filippousi Maria,
Leus Karen,
Lobato Ivan,
Ramachandran Ranjith K.,
Dendooven Jolien,
Detavernier Christophe,
Van Der Voort Pascal,
Van Tendeloo Gustaaf
Publication year - 2016
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201500252
Subject(s) - nanoclusters , nanoparticle , transmission electron microscopy , scanning transmission electron microscopy , electron tomography , dark field microscopy , materials science , atomic layer deposition , metal organic framework , nanotechnology , scanning electron microscope , deposition (geology) , layer (electronics) , direct imaging , nanoscopic scale , characterization (materials science) , atomic units , microscopy , chemistry , optics , adsorption , composite material , physics , paleontology , quantum mechanics , sediment , biology
MIL‐101 giant‐pore metal‐organic framework (MOF) materials have been loaded with Pt nanoparticles using atomic layer deposition. The final structure has been investigated by aberration‐corrected annular dark‐field scanning transmission electron microscopy under strictly controlled low‐dose conditions. By combining the acquired experimental data with image simulations, the position of the small clusters within the individual pores of a metal‐organic framework has been determined. The embedding of the Pt nanoparticles is confirmed by electron tomography, which shows a distinct ordering of the highly uniform Pt nanoparticles. The results show that atomic layer deposition is particularly well‐suited for the deposition of individual nanoparticles inside MOF framework pores and that, upon proper regulation of the incident electron dose, annular dark‐field scanning transmission electron microscopy is a powerful tool for the characterization of this type of materials at a local scale.