| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Eychmüller, Alexander
Universität Hamburg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (31/31 displayed)
- 2024Organosilicon-Based Ligand Design for High-Performance Perovskite Nanocrystal Films for Color Conversion and X-ray Imagingcitations
- 2023Voltage-Controlled ON-OFF-Switching of Magnetoresistance in FeOx/Fe/Au Aerogel Networks
- 2023Recipes and designs for aerogelscitations
- 2023Structural investigations of Au–Ni aerogels: morphology and element distributioncitations
- 2022Self-Supported Three-Dimensional Quantum Dot Aerogels as a Promising Photocatalyst for CO2 Reduction
- 2021Unprecedented Catalytic Activity and Selectivity in Methanol Steam Reforming by Reactive Transformation of Intermetallic In–Pt Compoundscitations
- 2020Increasing the Diversity and Understanding of Semiconductor Nanoplatelets by Colloidal Atomic Layer Deposition
- 2020Heterostructured Bismuth Telluride Selenide Nanosheets for Enhanced Thermoelectric Performance
- 2018Structural Analysis and Electrochemical Properties of Bimetallic Palladium–Platinum Aerogels Prepared by a Two‐Step Gelation Processcitations
- 2018Nanostructuring noble metals as unsupported electrocatalysts for polymer electrolyte fuel cellscitations
- 2018Self – supporting Hierarchical Porous PtAg Alloy Nanotubular Aerogels as Highly Active and Durable Electrocatalystscitations
- 2018Effect of Acid Washing on the Oxygen Reduction Reaction Activity of Pt-Cu Aerogel Catalystscitations
- 2018Core–Shell Structuring of Pure Metallic Aerogels towards Highly Efficient Platinum Utilization for the Oxygen Reduction Reactioncitations
- 2018Unsupported Pt-Ni Aerogels with Enhanced High Current Performance and Durability in Fuel Cell Cathodescitations
- 2017Core–Shell Structuring of Pure Metallic Aerogels towards Highly Efficient Platinum Utilization for the Oxygen Reduction Reactioncitations
- 2017Homogeneity and Elemental Distribution in Self-Assembled Bimetallic Pd-Pt Aerogels prepared by a spontaneous one-step gelation processcitations
- 20173D Assembly of All-Inorganic Colloidal Nanocrystals into Gels and Aerogelscitations
- 2016Anodically fabricated TiO2–SnO2 nanotubes and their application in lithium ion batteriescitations
- 20165-(2-Mercaptoethyl)-1H-tetrazolecitations
- 2016Gold aerogels: Three-dimensional assembly of nanoparticles and their use as electrocatalytic interfacescitations
- 2016pH and concentration dependence of the optical properties of thiol-capped CdTe nanocrystals in water and D2O
- 2016Homogeneity and elemental distribution in self-assembled bimetallic Pd–Pt aerogels prepared by a spontaneous one-step gelation processcitations
- 2015A spray-coating process for highly conductive silver nanowire networks as the transparent top-electrode for small molecule organic photovoltaicscitations
- 20153D assembly of silica encapsulated semiconductor nanocrystalscitations
- 2015Noble Metal Aerogels - Synthesis, Characterization, and Application as Electrocatalysts
- 2014Hybrid plasmonic/semiconductor nanoparticle monolayer assemblies as hyperbolic metamaterials
- 2014Multimetallic aerogels by template-free self-assembly of Au, Ag, Pt, and Pd nanoparticlescitations
- 2013Mixed aerogels from Au and CdTe nanoparticlescitations
- 2011Enhanced nucleation of vortices in soft magnetic materials prepared by silica nanosphere lithographycitations
- 2010Fabrication of two-dimensional Au@FePt core-shell nanoparticle arrays by photochemical metal depositioncitations
- 2009Hydrogels and aerogels from noble metal nanoparticlescitations
Places of action
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article
Multimetallic aerogels by template-free self-assembly of Au, Ag, Pt, and Pd nanoparticles
Abstract
<p>Nanostructured, porous metals are of great interest for material scientists since they combine high surface area, gas permeability, electrical conductivity, plasmonic behavior, and size-enhanced catalytic reactivity. Here we present the formation of multimetallic porous three-dimensional networks by a template-free self-assembly process. Nanochains are formed by the controlled coalescence of Au, Ag, Pt, and Pd nanoparticles in aqueous media, and their interconnection and interpenetration leads to the formation of a self-supporting network. The resulting noble-metal-gels are transformed into solid aerogels by the supercritical drying technique. Compared to previously reported results, the technique is facilitated by exclusion of additional destabilizers. Moreover, temperature control is demonstrated as a powerful tool, allowing acceleration of the gelation process as well as improvement of its reproducibility and applicability. Electron microscopy shows the nanostructuring of the network and its high porosity. XRD and EDX STEM are used to investigate the alloying behavior of the bimetallic aerogels and prove the control of the alloying state by temperature induced phase modifications. Furthermore, the resulting multimetallic aerogels show an extremely low relative density (<0.2%) and a very high surface area (>50 m<sup>2</sup>/g) compared to porous noble metals obtained by other approaches. Electrically conductive thin films as well as hybrid materials with organic polymers are depicted to underline the processability of the materials, which is a key factor regarding handling of the fragile structures and integration into device architectures. Owing to their exceptional and tunable properties, multimetallic aerogels are very promising materials for applications in heterogeneous catalysis and electrocatalysis, hydrogen storage, and sensor systems but also in surface enhanced Raman spectroscopy (SERS) and the preparation of transparent conductive substrates.</p>