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Arnaud Magrez

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Related publications (188)

In Vitro Investigation of the Cellular Toxicity of Boron Nitride Nanotubes

László Forró, Arnaud Magrez, Lenke Horváth, Rita Smajda, Beat Schwaller, Endre Horvath

Nanotubes present one of the most promising opportunities in nanotechnology with a plethora of applications in nanoelectronics, mechanical engineering, as well as in biomedical technology. Due to their structure and some physical properties, boron nitride ...

American Chemical Society2011

Influence of the initial state of carbon nanotubes on their colloidal stability under natural conditions

Laura Sigg, Arnaud Magrez

The colloidal stability of dry and suspended carbon nanotubes (CNTs) in the presence of amphiphilic compounds (i.e. natural organic matter or surfactants) at environmentally realistic concentrations was investigated over several days. The suspensions were ...

2011

Safety management of nanomaterials

Thierry Meyer, Amela Groso, Alke Fink, Arnaud Magrez

2011

Carbon nanotubes nanocomposites for microfabrication applications

László Forró, Moshe Judelewicz, Thierry Stora, Sébastien Jiguet, Arnaud Magrez, Marijana Mionic Ebersold

A composite epoxy resin consisting in a SU-8 epoxy resin, a solvent, with or without photoinitiator and carbon nanotubes in powder. When the resin is combined with the carbon nanotubes, the mechanical, thermal and electrical properties of the nanocomposite ...

2011

Long term stabilization of reaction center protein photochemistry by carbon nanotubes

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

The long term stability and the redox interaction between single walled carbon nanotubes (SWNTs) and photosynthetic reaction center proteins (RCs) purified from purple bacterium Rhodobacter sphaeroides R-26 in the SWNT/RC complex has been investigated. The ...

2011

Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

László Forró, Andrzej Sienkiewicz, Richard Gaal, Arnaud Magrez, Zlatko Mickovic, Jacim Jacimovic, Rita Smajda, George Cristian Vaju

Cubic ZnMnO3 powder in the form of well-crystalline nanoflakes have been synthesized at low temperatures from a nitrate precursor. The electrical properties of cubic ZuMnO(3) samples have been established by DC resistivity (rho) and thermo-electric power ( ...

Elsevier2011

Fabrication of homogeneous titania/MWNT composite materials

László Forró, Jin Won Seo, Arnaud Magrez, Klara Hernadi

MWNT/titania nanocomposites were prepared by an impregnation method and subsequent heat treatment at 400 degrees C. Precursor compounds such as titanium (IV) propoxide and titanium (IV) ethoxide were used to cover the surface of CNTs under solution conditi ...

Elsevier2011

Photocatalytic activity of TiO2/SWCNT and TiO2/MWCNT nanocomposites with different carbon nanotube content

László Forró, Arnaud Magrez, Klara Hernadi

With different mass ratios, titanium dioxide/carbon nanotube (0.1-10 wt% CNTcontent) nanocomposites were prepared with the aid of ultrasonication method. The structures of the various TiO2/CNT nanocomposites were characterized by electron microscopy (scann ...

2011

Photosynthetic reaction center protein in nanostructures

László Forró, Arnaud Magrez, Klara Hernadi, Krisztina Nagy

Photosynthetic reaction center (RC) is one of the most important proteins, because it is Nature's solar battery converting light energy into chemical potential in the photosynthetic membrane assuring conditions for carbon reduction in cells. Although it is ...

2011

Are Carbon Nanotube Effects on Green Algae Caused by Shading and Agglomeration?

Laura Sigg, Arnaud Magrez

Due to growing production, carbon nanotubes (CNT) may soon be found in a broad range of products and thus in the environment. In this work, an algal growth test was developed to determine effects of pristine and oxidized CNT on the green algae Chlorella vu ...

2011

Ionic and electronic conductivities in carbon nanotubes - ionogel solid device

Arnaud Magrez

Easy immobilisation of carbon nanofillers in a solid state device featuring mesopores filled with ionic liquid (IL) is presented. Such a route allows a good dispersion of carbon nanotubes (CNTs) and carbon fibers in N-methyl-N-propylpyrrolidinium bis(trifl ...

Royal Society of Chemistry2011

Electrical properties and applications of carbon based nanocomposite materials: An overview

Rosendo Sanjines, Arnaud Magrez, Marijana Mionic Ebersold, Rita Smajda

The allotropic forms of carbon (amorphous and polycrystalline graphite, carbon black, fullerenes, nanotubes, graphene) exhibit a large variety of charge transport properties which have been stimulating fundamental and applied research for the development o ...

2011

Controlled Positioning of Carbon Nanotubes by Dielectrophoresis : Insights into the Solvent and Substrat Role

Benjamin Dwir, László Forró, Elyahou Kapon, Arnaud Magrez, Martial Duchamp

We demonstrate the ability to precisely control the deposition of a defined number of carbon nanotubes (CNTs) from solution onto microfabricated electrodes using dielectrophoresis. The solvation shelf around the CNTs, exhibiting a high dielectric constant ...

2010

High-Efficiency Solid-State Dye-Sensitized Solar Cells: Fast Charge Extraction through Self-Assembled 3D Fibrous Network of Crystalline TiO2 Nanowires

László Forró, Michael Graetzel, Shaik Mohammed Zakeeruddin, Arnaud Magrez, Laurent Gabriel Félix Alexandre Stéphane Bungener, Jérémie Minh-Châu Brillet, Nicolas Tétreault, Rita Smajda, Endre Horvath, Thomas Moehl, Peng Wang

Herein, we present a novel morphology for solid-state dye-sensitized solar cells based on the simple and straightforward self-assembly of nanorods into a 3D fibrous network of fused single-crystalline anatase nanowires. This architecture offers a high roug ...

American Chemical Society2010

High-pressure study of anatase TiO2

Helmuth Berger, László Forró, Richard Gaal, Arnaud Magrez, Jacim Jacimovic, George Cristian Vaju

We report resistivity and thermo-electric power measurements of the anatase phase of TiO2 under pressure up to 2.3 GPa. Despite its transparent appearance, the single crystal of anatase exhibits a metallic-like resistivity above 60 K, at all pressures. The ...

2010

Reinforcing multiwall carbon nanotubes by electron beam irradiation

László Forró, Jin Won Seo, Arnaud Magrez, Richard Meunier, Martial Duchamp, Marijana Mionic Ebersold, Bo Song, Rita Smajda

We study the effect of electron beam irradiation on the bending modulus of multiwall carbon nanotubes grown by chemical vapor deposition. Atomic force microscopy observations of the nanotube deflection in the suspended-beam geometry suggest an internal, re ...

2010

Doping dependence of the G-band Raman spectra of an individual multiwall carbon nanotube

Arnaud Magrez

We present a gate-dependent Raman spectroscopy and electric transport measurements of an individually connected multiwall carbon nanotube in the field-effect transistor configuration at room temperature. We discuss the origin of the four distinct sharp mod ...

2010

Synthesis of Nanosized Mn-Doped ZnO by Low Temperature Decomposition of Hydrozincite Precursors

László Forró, Andrzej Sienkiewicz, Arnaud Magrez, Zlatko Mickovic, Marijana Mionic Ebersold, Duncan Thomas Lindsay Alexander

Transition-metal-doped ZnO is considered a promising candidate for applications in spintronics. Here, we developed it novel and versatile synthetic route for obtaining impurity-free Mn-doped zinc oxide (Zn1-xMnxO) materials witha well-controlled content of ...

2010

Capacitive nanoelectromechanical switch based on suspended carbon nanotube array

Didier Bouvet, László Forró, Mihai Adrian Ionescu, Arnaud Magrez, Donatello Acquaviva, Anupama Arun, Rita Smajda

We present the fabrication and high frequency characterization of a capacitive nanoelectromechanical system (NEMS) switch using a dense array of horizontally aligned single-wall carbon nanotubes (CNTs). The nanotubes are directly grown onto metal layers wi ...

American Institute of Physics2010

Low-Temperature, Highly Efficient Growth of Carbon Nanotubes on Functional Materials by an Oxidative Dehydrogenation Reaction

László Forró, Jin Won Seo, Arnaud Magrez, Juan Carlos Andresen, Marijana Mionic Ebersold, Rita Smajda

In many applications like photovoltaics, fuel cells, batteries, or interconnects in integrated circuits carbon nanotubes (CNTs) have the role of charge transport electrodes. The building of such devices requires an in situ growth of CNTs at temperatures wh ...

2010

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