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Arnaud Magrez

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Related publications (188)

Room-Temperature Negative Differential Resistance in Graphene Field Effect Transistors: Experiments and Theory

Mihai Adrian Ionescu, Arnaud Magrez, Laurent Syavoch Bernard, Antonios Bazigos, Pankaj Sharma

In this paper we demonstrate experimentally and discuss the negative differential resistance (NDR) in dual-gated graphene field effect transistors (GFETs) at room temperature for various channel lengths, ranging from 200 nm to 5 mu m. The GFETs were fabric ...

Amer Chemical Soc2015

The Role of Transport Agents in MoS2 Single Crystals

Helmuth Berger, László Forró, Arnaud Magrez, Bálint Náfrádi, Arnaud Walter, Jacim Jacimovic, Andrea Pisoni

We report resistivity, thermoelectric power, and thermal conductivity of MoS2 single crystals prepared by the chemical vapor transport (CVT) method using I-2, Br-2, and TeCl4 as transport agents. The material presents low-lying donor and acceptor levels, w ...

Amer Chemical Soc2015

Photochemical processes developed in composite based on highly separated metallic and semiconducting SWCNTs functionalized with polydiphenylamine

Arnaud Magrez

The electrochemical polymerization of diphenylamine (DPA) onto electrodes of Pt coated with highly separated metallic (98%) or semiconducting (99%) single-walled carbon nanotubes (SWCNTs) in the presence of H3PW12O40 was performed by cyclic voltammetry in ...

Pergamon-Elsevier Science Ltd2015

Graphene Negative Differential Resistance Circuit With Voltage-Tunable High Performance at Room Temperature

Mihai Adrian Ionescu, Arnaud Magrez, Laurent Syavoch Bernard, Antonios Bazigos, Pankaj Sharma

We propose, fabricate, and experimentally demonstrate a circuit based on graphene field-effect transistors (GFETs) showing enhanced negative differential resistance (NDR) characteristics at room temperature. The proposed graphene NDR (GNDR) circuit consist ...

Institute of Electrical and Electronics Engineers2015

Close and selective integration of carbon nanomaterials by cvd onto working microelectrodes of multi sensing electrochemical biosensors

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

A method composing the following steps; (a) forming electrodes, (b) effecting a catalyst deposition onto some electrodes, (c) applying a CVD process for a selective growth of carbon nanomaterial onto the electrodes, (d) activating the nanomaterials. ...

2015

Negative Differential Resistance in Top-Gated Chemical Vapor Deposition Grown Graphene Transistors

Mihai Adrian Ionescu, Arnaud Magrez, Laurent Syavoch Bernard, Antonios Bazigos, Pankaj Sharma

2015

Anti-Stokes Raman spectroscopy as a method to identify metallic and mixed metallic/semiconducting configurations of multi-walled carbon nanotubes

Arnaud Magrez

SERS studies were performed on films of two families of multi-wall carbon nanotubes (MWCNTs) under an excitation light of 514.5 nm and 647.1 nm. These included Aldrich-MWCNTs, which alternate semiconducting and metallic tubes and M-MWCNTs that contain only ...

Royal Soc Chemistry2015

Direct growth of carbon nanotubes on carbon fibers: Effect of the CVD parameters on the degradation of mechanical properties of carbon fibers

László Forró, Jin Won Seo, Arnaud Magrez

Grafting carbon nanotubes (CNTs) directly on carbon fibers represents a promising approach in order to strengthen the weak interface between carbon fibers and polymer matrix in carbon fiber reinforced polymer composites (CFRCs). We have carried out direct ...

Elsevier Science Sa2015

Graphene negative differential resistance (GNDR) circuit with enhanced performance at room temperature

Mihai Adrian Ionescu, Arnaud Magrez, Laurent Syavoch Bernard, Antonios Bazigos, Pankaj Sharma

We propose and experimentally demonstrate a novel circuit based on graphene FETs (GFETs) showing excellent negative differential resistance (NDR) characteristics at room temperature. The proposed GNDR circuit exploits a closed loop connection of 1-GFET wit ...

IEEE2015

Crystal Structure, Transport, and Magnetic Properties of an Ir6+ Compound Ba8Al2IrO14

László Forró, Arnaud Magrez, Alla Arakcheeva, Bastien Dalla Piazza, Ana Akrap, Krunoslav Prsa, Henrik Moodysson Rønnow, Jacim Jacimovic, Sergiy Katrych, Andrea Pisoni, Lin Yang

The novel iridate Ba8Al2IrO14 was prepared as single crystals by self-flux method, thereby providing a rare example of an all-Ir(VI) compound that can be synthesized under ambient pressure conditions. The preparation of all-Ir6+ iridate without using tradi ...

2015

Microengineered CH3NH3PbI3 Nanowire/Graphene Phototransistor for Low-Intensity Light Detection at Room Temperature

László Forró, Richard Gaal, Arnaud Magrez, Bálint Náfrádi, Massimo Spina, Endre Horvath, Laurent Syavoch Bernard, Mario Joe Lehmann, Eric Joseph Bonvin

The first hybrid phototransistors are reported where the performance of a network of photoactive CH3NH3PbI3 nanowires is enhanced by CVD-grown monolayer graphene. These devices show responsivities as high as ≈2.6 × 106 A W- ...

2015

Momentum and photon energy dependence of the circular dichroic photoemission in the bulk Rashba semiconductors BiTeX (X = I, Br, Cl)

Helmuth Berger, Philippe Bugnon, Marco Grioni, Arnaud Magrez, Oleg Yazyev, Luca Moreschini, Alberto Crepaldi, Gabriel Albert Autes, Cédric Tournier-Colletta, Jens Christian Johannsen

Bulk Rashba systems BiTeX (X = I, Br, Cl) are emerging as important candidates for developing spintronics devices because of the coexistence of spin-split bulk and surface states, along with the ambipolar character of the surface charge carriers. The need ...

American Physical Society2014

Optical properties of BiTeBr and BiTeCl

Helmuth Berger, Philippe Bugnon, Arnaud Magrez, Ana Akrap, Dirk Van der Marel

We present a comparative study of the optical properties-reflectance, transmission, and optical conductivity- and Raman spectra of two layered bismuth-tellurohalides BiTeBr and BiTeCl at 300 and 5 K, for light polarized in the a-b planes. Despite different ...

Amer Physical Soc2014

Unusual Shubnikov-de Haas oscillations in BiTeCl

Helmuth Berger, Philippe Bugnon, Arnaud Magrez

We report measurements of Shubnikov-de Haas oscillations in single crystals of BiTeCl at magnetic fields up to 31 T and at temperatures as low as 0.4 K. Two oscillation frequencies were resolved at the lowest temperatures, F-1 = 65 +/- 4 T and F-2 = 156 +/ ...

Amer Physical Soc2014

Electric-Field-Induced Skyrmion Distortion and Giant Lattice Rotation in the Magnetoelectric Insulator Cu2OSeO3

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

Uniquely in Cu2OSeO3, the Skyrmions, which are topologically protected magnetic spin vortexlike objects, display a magnetoelectric coupling and can be manipulated by externally applied electric (E) fields. Here, we explore the E-field coupling to the magne ...

American Physical Society2014

An innovative Yb-based ultrafast deep ultraviolet source for time-resolved photoemission experiments

Helmuth Berger, Arnaud Magrez

Time- and angle-resolved photoemission spectroscopy is a powerful technique to study ultrafast electronic dynamics in solids. Here, an innovative optical setup based on a 100-kHz Yb laser source is presented. Exploiting non-collinear optical parametric amp ...

Amer Inst Physics2014

High-Performance Multipanel Biosensors Based on a Selective Integration of Nanographite Petals

László Forró, Arnaud Magrez, Giovanni De Micheli, Andrea Cavallini, Sandro Carrara, Irene Taurino, Federico Matteini

We report the first selective growth of nanographite petals and various carbon nanomaterials onto a multipanel electrochemical platform. Different types of nanomaterials can be obtained by fine-tuning the growth parameters of the chemical vapor deposition ...

Amer Chemical Soc2014

The effect of titania precursor on the morphology of prepared TiO2/MWCNT nanocomposite materials

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Since materials science is of great importance, the application of composite materials based on carbon nanotubes (CNTs) is widely investigated. Current work is aimed at preparing nanocomposites of TiO2/MWCNT using an impregnation method combined with slow ...

Wiley-V C H Verlag Gmbh2014

Electrical conduction of photo-patternable SU8-graphene composites

László Forró, Claudio Grimaldi, Arnaud Magrez, Maryam Majidian, Andrea Pisoni

Graphene-based SU8 nanocomposite is developed as a new conductive polymer, which benefits from remarkable electrical conductivity of graphene, along with photo-pattern-ability and transparency of SU8. Well defined structures with minimal resolution of 10 m ...

Pergamon-Elsevier Science Ltd2014

Photosynthetic reaction centre/carbon nanotube bundle composites

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Since their discovery, carbon nanotubes (CNTs) have attracted intense attention to broad range of potential applications. In contrast to the 1D isolated single-walled carbon nanotubes (SWCNT), 2D films or bundles made of thousands of tubes have been introd ...

Wiley-V C H Verlag Gmbh2014

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