title: Gold Aerogels: Three-Dimensional Assembly of Nanoparticles and Their Use as Electrocatalytic Interfaces.
abstract: Three-dimensional (3D) porous metal nanostructures have been a long sought-after class of materials due to their collective properties and widespread applications. In this study, we report on a facile and versatile strategy for the formation of Au hydrogel networks involving the dopamine-induced 3D assembly of Au nanoparticles. Following supercritical drying, the resulting Au aerogels exhibit high surface areas and porosity. They are all composed of porous nanowire networks reflecting in their diameters those of the original particles (5-6 nm) via electron microscopy. Furthermore, electrocatalytic tests were carried out in the oxidation of some small molecules with Au aerogels tailored by different functional groups. The beta-cyclodextrin-modified Au aerogel, with a host-guest effect, represents a unique class of porous metal materials of considerable interest and promising applications for electrocatalysis.
authors.affiliation: Physical Chemistry, TU Dresden , Bergstrasse 66b, 01062 Dresden, Germany.
authors.forename: Dan
authors.initials: D
authors.lastname: Wen
authors.affiliation: Physical Chemistry, TU Dresden , Bergstrasse 66b, 01062 Dresden, Germany.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Physical Chemistry, TU Dresden , Bergstrasse 66b, 01062 Dresden, Germany.
authors.forename: Danny
authors.initials: D
authors.lastname: Haubold
authors.affiliation: Physical Chemistry, TU Dresden , Bergstrasse 66b, 01062 Dresden, Germany.
authors.forename: Chengzhou
authors.initials: C
authors.lastname: Zhu
authors.affiliation: Inorganic Chemistry, TU Dresden , Bergstrasse 66, 01062 Dresden, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Oschatz
authors.affiliation: Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6, 01069 Dresden, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Holzschuh
authors.affiliation: Physical Chemistry, TU Dresden , Bergstrasse 66b, 01062 Dresden, Germany.
authors.forename: André
authors.initials: A
authors.lastname: Wolf
authors.affiliation: Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6, 01069 Dresden, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Simon
authors.affiliation: Inorganic Chemistry, TU Dresden , Bergstrasse 66, 01062 Dresden, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Kaskel
authors.affiliation: Physical Chemistry, TU Dresden , Bergstrasse 66b, 01062 Dresden, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Eychmüller
keywords: Au aerogels; dopamine; electrocatalysis; host−guest interaction; nanoparticle assembly; porous metal