| People | Locations | Statistics |
|---|---|---|
| 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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Fermín, David J.
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2024Activating Mn Sites by Ni Replacement in α-MnO2citations
- 2024Correlating molecular precursor interactions with device performance in solution-processed Cu2ZnSn(S,Se)4 thin-film solar cellscitations
- 2022Correlating Orbital Composition and Activity of LaMnxNi1–xO3 Nanostructures toward Oxygen Electrocatalysiscitations
- 2021Electrocatalytic Site Activity Enhancement via Orbital Overlap in A 2MnRuO 7(A = Dy 3+, Ho 3+, and Er 3+) Pyrochlore Nanostructurescitations
- 2020High Interfacial Hole‐Transfer Efficiency at GaFeO3 Thin Film Photoanodescitations
- 2020Pulsed laser deposition of single phase n- and p-type Cu2O thin films with low resistivitycitations
- 2020Promoting Active Electronic States in LaFeO3 Thin-Films Photocathodes via Alkaline-Earth Metal Substitutioncitations
- 2019Doping and alloying of kesteritescitations
- 2019Photovoltaic Performance of Phase-Pure Orthorhombic BiSI Thin-Filmscitations
- 2018Insights into the durability of Co-Fe spinel oxygen evolution electrocatalystscitations
- 2018Impact of Sb and Na Doping on the Surface Electronic Landscape of Cu2ZnSnS4 Thin Filmscitations
- 2018Investigating the Role of the Organic Cation in Formamidinium Lead Iodide Perovskite Using Ultrafast Spectroscopycitations
- 2018AMnO3 (A = Sr, La, Ca, Y) Perovskite Oxides as Oxygen Reduction Electrocatalystscitations
- 2017YFeO3 Photocathodes for Hydrogen Evolutioncitations
- 2017Textured PbI2 photocathodes obtained by gas phase anion replacementcitations
- 2017Single molecular precursor solution for CuIn(S,Se)2 thin films photovoltaic cellscitations
- 2017Solution Processed Single-Phase Cu2SnS3 filmscitations
- 2017Spectroscopic and electrical signatures of acceptor states in solution processed Cu2ZnSn(S,Se)4 solar cellscitations
- 2017Real-Time Tracking of Metal Nucleation via Local Perturbation of Hydration Layerscitations
- 2017YFeO 3 Photocathodes for Hydrogen Evolutioncitations
- 2016Cu2ZnSnS4 thin-films generated from a single solution based precursorcitations
- 2016Influence of thermal treatments on the stability of Pd nanoparticles supported on graphitised ordered mesoporous carbonscitations
- 2016A Synthetic Route for the Effective Preparation of Metal Alloy Nanoparticles and Their Use as Active Electrocatalystscitations
- 2015Crystal structure and defects visualization of Cu2ZnSnS4 nanoparticles employing transmission electron microscopy and electron diffractioncitations
- 2015Surface Activation of Pt Nanoparticles Synthesised by "Hot Injection" in the Presence of Oleylaminecitations
- 2015Growth of Epitaxial Pt<inf>1-x</inf>Pb<inf>x</inf> Alloys by Surface Limited Redox Replacement and Study of Their Adsorption Propertiescitations
- 2015Crystal structure and defects visualization of Cu 2 ZnSnS 4 nanoparticles employing transmission electron microscopy and electron diffractioncitations
- 2015Solution processed bismuth ferrite thin films for all-oxide solar photovoltaicscitations
- 2015Fast One-Pot Synthesis of MoS2/Crumpled Graphene p-n Nanonjunctions for Enhanced Photoelectrochemical Hydrogen Productioncitations
- 2015High surface area diamond-like carbon electrodes grown on vertically aligned carbon nanotubescitations
- 2013Electrochemical crystallization of spatially organized copper microwire arrays within biomineralized (dentine) templatescitations
- 2013Structure and Band Edge Energy of Highly Luminescent CdSei(1-x)Te(x) Alloyed Quantum Dotscitations
- 2012Electrocatalytic Properties of Strained Pd Nanoshells at Au Nanostructures: CO and HCOOH Oxidationcitations
- 2011Hydrogen Adsorption at Strained Pd Nanoshellscitations
- 2005Adsorption and photoreactivity of CdSe nanoparticles at liquid|liquid interfacescitations
- 2004Electrochemical and optical properties of two dimensional electrostatic assembly of Au nanocrystalscitations
- 2003Photoinduced electron transfer at liquid vertical bar liquid interfaces. Part VII. Correlation between self-organisation and structure of water-soluble photoactive speciescitations
Places of action
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article
Electrochemical and optical properties of two dimensional electrostatic assembly of Au nanocrystals
Abstract
The spectroscopic and electrochemical properties of two-dimensional electrostatic assembly of Au nanocrystals are examined on poly-L-lysine (pLys) modified gold electrodes. The surface preparation for the nanoparticle deposition involved the self-assembly of a monolayer of 11-mercaptoundecanoic acid on the electrode surface, followed by the electrostatic deposition of pLys from aqueous solution. The polyelectrolyte layer acts as the electrostatic anchor for the Au particles. Electrostatically stabilised Au particles were prepared by homogeneous reduction in the presence of citrate, yielding monodispersed colloidal suspension with an average diameter of 18 2 run. After 4 h of deposition, the citrate-stabilised particles reach a maximum surface density of (8.2 +/- 0.1) x 10(10) particles cm(-2), with an average edge-to-edge distance of 25 nm. The particle surface density was estimated from scanning electron micrographs. Kelvin probe measurements were employed for examining changes in surface dipole introduced by the 2D array of nanocrystals. From simple electrostatic arguments, the apparent static dipole moment per particle was estimated of the order of 2700 D. The strong interaction between the nanocrystals and the pLys layer is responsible for the surface charge displacement, leading to changes in the surface dipole of 0.35 eV. These electrostatic interactions also manifest itself by the red shift of the plasmon resonance of the assembly with respect to the aqueous colloidal suspension. Analysis of the spectral broadening was attempted within the framework of the so-called coherent-potential approximation. Finally, electrochemical studies in 1,2-dichloroethane show a large electronic overlap between the nanocrystals and the metal substrate. Results obtained from electrochemical impedance spectroscopy strongly suggest that the electrostatic assembly of nanocrystal behaves like a 2D array of randomly distributed spherical nanoelectrodes.