Publications de Jean-Pierre Abid

Correspondence "Origin of the magneto–thermogalvanic voltage in cluster-assembled metallic nanostructures"

Jean-Philippe Ansermet, Jean-Pierre Abid, Santiago Serrano Guisan, Giulia Di Domenicantonio

2008

Controlled Reversible Adsorption of Core-Shell Metallic Nanoparticles at the Polarized Water/1,2-Dichloroethane Interface Investigated by Optical Second-Harmonic Generation

Hubert Girault, Christophe Bauer, Pierre-François Marie Brevet, Jean-Pierre Abid

We report the observation of the reversible adsorption of core-shell gold-silver nanoparticles at the polarized water/1,2-dichloroethane interface using the nonlinear optical technique of surface second-harmonic generation. This study unambiguously demonst ...

2007

Adsorption monitoring device

Hubert Girault, Jean-Pierre Abid

A device for monitoring the adsorption of target molecules on a substrate, the device comprising a substrate (1), at least a portion of which is formed as a thin dielectric layer. A first, modified surface (2) of the layer has ionizable groups of the subst ...

2006

Enhanced magnetic field sensitivity of spin-dependent transport in cluster-assembled metallic nanostructures

Jean-Philippe Ansermet, Jean-Pierre Abid, Santiago Serrano Guisan, Giulia Di Domenicantonio

The emerging field of spintronics explores the many possibilities offered by the prospect of using the spin of the electrons for fast, nanosized electronic devices. The effect of magnetization acting on a current is the essence of giant or tunnel magnetore ...

Nature Publishing Group2006

Magnetotransport properties depending on the nanostructure of Fe3O4 nanowires

Jean-Philippe Ansermet, Jean-Pierre Abid, Sami Jannin, Santiago Serrano Guisan

We have studied the magnetic behaviour of Fe3O4 nanowires (NWs) with two different diameter ranges, above 150 nm and below 60 nm, made by electrodeposition techniques into a polymeric template. The nanowires were characterized using various techniques, in ...

2006

Ferromagnetism at Room Temperature on Electrodeposited Co2+-Doped ZnO Thin Film

Jean-Philippe Ansermet, Jean-Pierre Abid

Predicted by the theory, ferromagnetism is expected in Co-doped ZnO. Recently, ferromagnetism above room temperature was reported in thin films as well as in bulk samples made of cobalt-doped zinc oxide. In this study, we report the preparation of ZnO dope ...

2006

Nanowires Networks for Biomolecular Detection using Contactless Impedance Tomoscopy Technique

Hubert Girault, Jean-Philippe Ansermet, Jean-Pierre Abid

Here we present the detection of ultralow concentrations of biomolecules in a device made from a polycarbonate membrane containing a network of gold nanowires and using a “contactless” impedance tomoscopy technique. The sensor comprises a thin dielectric l ...

2006

Role of Adsorbates on Dynamics of Hot-Electron (type I and II) Thermalization within Gold Nanoparticles

Hubert Girault, Christophe Bauer, Jean-Pierre Abid

Early stages of hot-electron thermalization in small gold nanoparticles wrapped in an adsorbates shell have been investigated by femtosecond transient absorption spectroscopy. Type-I hot electrons thermalize in 800 fs (to form type-II hot electron) either ...

Elsevier2006

Hot Adsorbate-Induced Retardation of the Internal Thermalization of Nonequilibrium Electrons in Adsorbate-Covered Metal Nanoparticles

Hubert Girault, Christophe Bauer, Jean-Pierre Abid

Femtosecond transient absorption spectroscopy has been used to investigate the electron-electron scattering dynamics in sulfate-covered gold nanoparticles of 2.5 and 9.2 nm in diameter. We observe an unexpected retardation of the absolute internal thermali ...

2006

Size Dependence of Investigations of Hot Electron Cooling Dynamincs in Metal/Adsorbates Nanoparticles

Hubert Girault, Christophe Bauer, Jean-Pierre Abid

The size dependence of electron-phonon coupling rate has been investigated by femtosecond transient absorption spectroscopy for gold nanoparticles (NPs) wrapped in a shell of sulfate with diameter varying from 1.7 to 9.2 nm. Broad-band spectroscopy gives a ...

Elsevier2005