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Arnaud Magrez

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Related publications (188)

Probing titanate nanowire surface acidity through methylene blue adsorption in colloidal suspension and on thin films

László Forró, Arnaud Magrez, Endre Horvath

The interaction of the cationic dye methylene blue (MB) with titanate nanowires (TiONWs) was investigated in different pH environments using visible spectroscopy and electrophoresis on thin films as well as in aqueous suspension. The surface charge of the ...

Academic Press Inc Elsevier Science2014

Dispersion Characteristics and Aggregation in Titanate Nanowire Colloids

László Forró, Plinio Maroni, Arnaud Magrez, Endre Horvath

Titanate nanowires (TiONWs) are synthesized through the hydrothermal method and characterized in acidic aqueous dispersions by using electrophoresis, dynamic light scattering, and atomic force microscopy. The TiONWs have a rodlike shape with an average len ...

Wiley-V C H Verlag Gmbh2014

Nanopore Integrated Nanogaps for DNA Detection

László Forró, Axel Fanget, Aleksandra Radenovic, Arnaud Magrez, Floriano Traversi, Sergey Khlybov

A high-throughput fabrication of sub-10 nm nanogap electrodes combined with solid-state nanopores is described. These devices should allow concomitant tunneling and ionic current detection of translocating DNA molecules. We report the optimal fabrication p ...

American Chemical Society2014

Exploration of the helimagnetic and skyrmion lattice phase diagram in Cu2OSeO3 using magnetoelectric susceptibility

Helmuth Berger, Arnaud Magrez, Krunoslav Prsa, Henrik Moodysson Rønnow, Ivica Zivkovic, Arash Alahgholipour Omrani, Jonathan White

Using superconducting quantum interference device magnetometry techniques, we have studied the change in magnetization versus applied ac electric field, i.e. the magnetoelectric (ME) susceptibility dM/dE, in the chiral-lattice ME insulator Cu2OSeO3. Measur ...

Amer Physical Soc2014

Thermal diffusivity measurements of templated nanocomposite using infrared thermography

Helmuth Berger, Philippe Bugnon, Arnaud Magrez, Manish Sharma

Electrodeposited bismuth telluride (Bi2Te3) nanowires using anodic alumina (AAO) templates show anisotropic thermal properties in a direction parallel and perpendicular to the nanowire/nanochannel axis. The present study reports thermal diffusivity measure ...

Elsevier Science Bv2014

Efficient voltammetric discrimination of free bilirubin from uric acid and ascorbic acid by a CVD nanographite-based microelectrode

László Forró, Arnaud Magrez, Giovanni De Micheli, Sandro Carrara, Irene Taurino

We report a novel electrochemical sensor based on nanographite grown on platinum microelectrodes for the determination of bilirubin in the presence of normal concentrations of albumin. The albumin is a protein with an intrinsic ability to bind the bilirubi ...

Elsevier Science Bv2014

Enhanced low-temperature thermoelectrical properties of BiTeCl grown by topotactic method

Helmuth Berger, Philippe Bugnon, László Forró, Richard Gaal, Arnaud Magrez, Ana Akrap, Jacim Jacimovic, Xavier François Mettan, Sergiy Katrych, Andrea Pisoni

We developed a topotactic strategy to grow BiTeCl single crystals. Structural characterization by means of X-ray diffraction was performed, and the high crystallinity of the material was proven. Measurements of the thermoelectrical coefficients electrical ...

Pergamon-Elsevier Science Ltd2014

Direct and selective synthesis of a wide range of carbon nanomaterials by CVD at CMOS compatible temperatures

László Forró, Arnaud Magrez, Giovanni De Micheli, Sandro Carrara, Irene Taurino

Biosensors benefit from specific nano- to monitor human metabolites [1], [2]. Moreover, small structuration of the active bio-interface layer. In this electrodes allow us to design many sensing sites, each perspective, a wide range of carbon nanomaterials ...

2014

Sorption kinetics and equilibrium of the herbicide diuron to carbon nanotubes or soot in absence and presence of algae

Laura Sigg, Arnaud Magrez

Carbon nanotubes (CNT) are strong sorbents for organic micropollutants, but changing environmental conditions may alter the distribution and bioavailability of the sorbed substances. Therefore, we investigated the effect of green algae (Chlorella vulgaris) ...

Elsevier Sci Ltd2014

Functionalized graphene grown by oxidative dehydrogenation chemistry

László Forró, Daniel Oberli, Arnaud Magrez, Arnaud Walter, Jacim Jacimovic, Massimo Spina, Endre Horvath, Laurent Syavoch Bernard

We report on a highly efficient growth of graphene using dehydrogenation of acetylene by an oxidative reaction with carbon dioxide. In few seconds, large-area of copper foil used as catalyst of the reaction is fully covered with graphene. The yield of the ...

Pergamon-Elsevier Science Ltd2014

Chemical challenges during the synthesis of MWCNT-based inorganic nanocomposite materials

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Multiwalled carbon nanotubes (MWCNTs) were successfully covered with metal oxides - such as TiO2, ZnO, Al2O3, SnO2, and In2O3 nanoparticles - with different preparation methods under solvent conditions. The applied synthesis techniques were impregnation, a ...

Wiley-V C H Verlag Gmbh2014

Carbon nanotubes quench singlet oxygen generated by photosynthetic reaction centers

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath, Krisztina Nagy

Photosensitizers may convert molecular oxygen into reactive oxygen species (ROS) including, e.g., singlet oxygen (O-1(2)), superoxide anion (O-2(-center dot)), and hydroxyl radicals ((OH)-O-center dot), chemicals with extremely high cyto- and potential gen ...

Wiley-V C H Verlag Gmbh2013

Tunable Polaronic Conduction in Anatase TiO2

Helmuth Berger, László Forró, Marco Grioni, Arnaud Magrez, Luca Moreschini, Jacim Jacimovic, Simon Karl Moser

Oxygen vacancies created in anatase TiO2 by UV photons (80–130 eV) provide an effective electron-doping mechanism and induce a hitherto unobserved dispersive metallic state. Angle resolved photoemission reveals that the quasiparticles are large polarons. T ...

Amer Physical Soc2013

Synthesis of Homogeneous Manganese-Doped Titanium Oxide Nanotubes from Titanate Precursors

László Forró, Kurt Schenk, Arnaud Magrez, Bálint Náfrádi, Zlatko Mickovic, Rita Smajda, Endre Horvath, Péter Szirmai

We report a novel synthesis route of homogeneously manganese-doped TiO2 nanotubes in a broad concentration range. The scroll-type trititanate (H2Ti3O7) nanotubes prepared by hydrothermal synthesis were used as precursors. Mn2+ ions were introduced by an io ...

Amer Chemical Soc2013

Evaluation of the toxicity of graphene derivatives on cells of the lung luminal surface

László Forró, Klaus Kern, Arnaud Magrez, Marko Burghard, Lenke Horváth, Beat Schwaller

Graphene-based nanomaterials are expected to have a profound impact on a broad range of applications. However, studies devoted to investigating the putative adverse health effects of these nanomaterials are hugely underrepresented in the current scientific ...

Pergamon-Elsevier Science Ltd2013

Electrical conductivity of multi-walled carbon nanotubes-SU8 epoxy composites

László Forró, Claudio Grimaldi, Richard Gaal, Arnaud Magrez, Marijana Mionic Ebersold

We have characterized the electrical conductivity of the composite which consists of multi-walled carbon nanotubes dispersed in SU8 epoxy resin. Depending on the processing conditions of the epoxy (ranging from non-polymerized to cross-linked), we obtained ...

Amer Inst Physics2013

Preparation and characterization of multiwalled carbon nanotube/In2O3 composites

László Forró, Arnaud Magrez, Klara Hernadi

We have prepared multiwalled carbon nanotube (MWCNT)/In2O3 composites using a simple impregnation method. The precursor compound indium(III) chloride (InCl3) was used to cover the surface of MWCNTs and distilled water was used as solvent. The applied mass ...

Pergamon-Elsevier Science Ltd2013

Photocurrent generated by photosynthetic reaction centers/carbon nanotube/ITO bio-nanocomposite

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Springer2013

Carbon nanotube as functional matrix for bacterial photosynthetic reaction centers

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Springer2013

Diuron Sorbed to Carbon Nanotubes Exhibits Enhanced Toxicity to Chlorella vulgaris

Laura Sigg, Arnaud Magrez

Carbon nanotubes (CNT) are more and more likely to be present in the environment, where they, will associate with organic raicropollutants due to strong sorption. The toxic effects of these CNT-micropollutant mixtures on aquatic organisms are poorly charac ...

Amer Chemical Soc2013

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