title: Atomic Layer Deposition Route To Tailor Nanoalloys of Noble and Non-noble Metals.
abstract: Since their early discovery, bimetallic nanoparticles have revolutionized various fields, including nanomagnetism and optics as well as heterogeneous catalysis. Knowledge buildup in the past decades has witnessed that the nanoparticle size and composition strongly impact the nanoparticle's properties and performance. Yet, conventional synthesis strategies lack proper control over the nanoparticle morphology and composition. Recently, atomically precise synthesis of bimetallic nanoparticles has been achieved by atomic layer deposition (ALD), alleviating particle size and compositional nonuniformities. However, this bimetal ALD strategy applies to noble metals only, a small niche within the extensive class of bimetallic alloys. We report an ALD-based approach for the tailored synthesis of bimetallic nanoparticles containing both noble and non-noble metals, here exemplified for Pt-In. First, a Pt/In2O3 bilayer is deposited by ALD, yielding precisely defined Pt-In nanoparticles after high-temperature H2 reduction. The nanoparticles' In content can be accurately controlled over the whole compositional range, and the particle size can be tuned from micrometers down to the nanometer scale. The size and compositional flexibility provided by this ALD-approach will trigger the fabrication of fully tailored bimetallic nanomaterials, including superior nanocatalysts.
authors: Department of Solid State Sciences, COCOON, Ghent University , Krijgslaan 281/S1, B-9000 Ghent, Belgium.
authors: Ranjith K
authors: RK
authors: Ramachandran
authors: Department of Solid State Sciences, COCOON, Ghent University , Krijgslaan 281/S1, B-9000 Ghent, Belgium.
authors: Jolien
authors: J
authors: Dendooven
authors: Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Zwijnaarde, Belgium.
authors: Matthias
authors: M
authors: Filez
authors: Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Zwijnaarde, Belgium.
authors: Vladimir V
authors: VV
authors: Galvita
authors: Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Zwijnaarde, Belgium.
authors: Hilde
authors: H
authors: Poelman
authors: Department of Solid State Sciences, COCOON, Ghent University , Krijgslaan 281/S1, B-9000 Ghent, Belgium.
authors: Eduardo
authors: E
authors: Solano
authors: Department of Solid State Sciences, COCOON, Ghent University , Krijgslaan 281/S1, B-9000 Ghent, Belgium.
authors: Matthias M
authors: MM
authors: Minjauw
authors: Department of Solid State Sciences, COCOON, Ghent University , Krijgslaan 281/S1, B-9000 Ghent, Belgium.
authors: Kilian
authors: K
authors: Devloo-Casier
authors: Synchrotron SOLEIL, SAMBA Beamline, L'Orme des Merisiers, Saint-Aubin, BP48, 91192 Gif-sur-Yvette, France.
authors: Emiliano
authors: E
authors: Fonda
authors: Netherlands Organisation for Scientific Research, DUBBLE@ESRF, Avenue des Martyrs, CS40220, 38043 Grenoble, France.
authors: Daniel
authors: D
authors: Hermida-Merino
authors: Netherlands Organisation for Scientific Research, DUBBLE@ESRF, Avenue des Martyrs, CS40220, 38043 Grenoble, France.
authors: Wim
authors: W
authors: Bras
authors: Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Zwijnaarde, Belgium.
authors: Guy B
authors: GB
authors: Marin
authors: Department of Solid State Sciences, COCOON, Ghent University , Krijgslaan 281/S1, B-9000 Ghent, Belgium.
authors: Christophe
authors: C
authors: Detavernier
keywords: ALD; bimetallic nanoparticles; indium; nanocatalysts; platinum