title: Alloying Behavior of Self-Assembled Noble Metal Nanoparticles.
abstract: The atomic redistribution processes occurring in multiparticle nanostructures are hardly understood. To obtain a more detailed insight, we applied high-resolution microscopic, diffraction and spectroscopic characterization techniques to investigate the fine structure and elemental distribution of various bimetallic aerogels with 1:1 compositions, prepared by self-assembly of single monometallic nanoparticles. The system Au-Ag exhibited a complete alloy formation, whereas Pt-Pd aerogels formed a Pd-based network with embedded Pt particles. The assembly of Au and Pd nanoparticles resulted in a Pd-shell formation around the Au particles. This work confirms that bimetallic aerogels are subject to reorganization processes during their gel formation.
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01069, Dresden, Germany.
authors.forename: Laura
authors.initials: L
authors.lastname: Kühn
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01069, Dresden, Germany.
authors.forename: Anne-Kristin
authors.initials: AK
authors.lastname: Herrmann
authors.affiliation: International Centre of Electron Microscopy for Material Science and Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology Krakow, Al. Adama Mickiewicza 30, 30-059, Krakow, Poland.
authors.forename: Bogdan
authors.initials: B
authors.lastname: Rutkowski
authors.affiliation: Paul Scherrer Institute, 5232, Villigen, Switzerland.|Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky Str. 9-11, 26111, Oldenburg, Germany.
authors.forename: Mehtap
authors.initials: M
authors.lastname: Oezaslan
authors.affiliation: Paul Scherrer Institute, 5232, Villigen, Switzerland.
authors.forename: Maarten
authors.initials: M
authors.lastname: Nachtegaal
authors.affiliation: Institute for Complex Materials, IFW Dresden, PO 27 01 16, 01171, Dresden, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Klose
authors.affiliation: Institute for Complex Materials, IFW Dresden, PO 27 01 16, 01171, Dresden, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Giebeler
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01069, Dresden, Germany.
authors.forename: Nikolai
authors.initials: N
authors.lastname: Gaponik
authors.affiliation: Institute for Complex Materials, IFW Dresden, PO 27 01 16, 01171, Dresden, Germany.|Institute of Materials Science, TU Dresden, Helmholtzstrasse 7, 01069, Dresden, Germany.|Erich Schmid Institute of Materials Science, Austrian Academy of Sciences and Department Materials Physics, Montanuniversität Leoben, Jahnstrasse 12, 8700, Leoben, Austria.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Eckert
authors.affiliation: Paul Scherrer Institute, 5232, Villigen, Switzerland.|Laboratory of Physical Chemistry, ETH Zürich, 8093, Zürich, Switzerland.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Schmidt
authors.affiliation: International Centre of Electron Microscopy for Material Science and Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology Krakow, Al. Adama Mickiewicza 30, 30-059, Krakow, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Czyrska-Filemonowicz
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01069, Dresden, Germany. alexander.eychmueller@chemie.tu-dresden.de.
authors.forename: Alexander
authors.identifier: http://orcid.org/0000-0001-9926-6279
authors.initials: A
authors.lastname: Eychmüller
keywords: aerogels; alloys; multimetallic; porous metals; self-assembly