Concept

Oxyde de zinc

Publications associées (563)

A structural investigation of the four phases of 7-oxabicyclo[2.2.1]heptane

Powder synchrotron X-ray diffraction studies confirm that 7-oxabicyclo[2.2.1]heptane, (oxanorbornane), forms three solid phases on cooling and four on warming, as previously indicated by spectroscopic and DSC meas urements. The two highest temperature phas ...

2007

Magnetotransport properties depending on the nanostructure of Fe3O4 nanowires

Jean-Philippe Ansermet, Sami Jannin, Jean-Pierre Abid, 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

Indium surfactant effect on AlN/GaN heterostructures grown by metal-organic vapor-phase epitaxy: Applications to intersubband transitions

Nicolas Grandjean, Jean-François Carlin, Marc Ilegems, Eric Feltin, Sylvain Nicolay, Mauro Mosca

We report on a dramatic improvement of the optical and structural properties of AlN/GaN multiple quantum wells (MQWs) grown by metal-organic vapor-phase epitaxy using indium as a surfactant. This improvement is observed using photoluminescence as well as x ...

2006

Photoluminescence characterization of few-nanocrystals electronic devices

Jürgen Brugger, Marc Antonius Friedrich van den Boogaart

Photoluminescence (PL) spectroscopy is demonstrated as a suitable technique to characterize silicon nanocrystals (Si-NCs)-based nonvolatile memory devices. The 2D array of Si-NCs forming the floating gate is obtained by low-energy ion implantation in thin ...

2006

Thermoelectrical study of ferromagnetic nanowire structures

Jean-Philippe Ansermet, Santiago Serrano Guisan

The mixed effects of heat and charge transports have been studied at room temperature for NiCu and CoCu multilayers with currents perpendicular to the interfaces as well as Ni and Co homogeneous nanowires. In order to carry out this analysis, magnetothermo ...

American Institute of Physics2006

Stress control in GaN/sapphire templates for the fabrication of crack-free thick layers

Nicolas Grandjean, Marc Ilegems, Denis Martin

The reduction of the tensile stress contained in GaN layers grown oil sapphire by metalorganic vapor phase epitaxy (MOVPE) is achieved using a low density of initial GaN crystallites. The template layers exhibit a significant reduction in dislocation densi ...

2006

Rough ZnO Layers by LP-CVD Process and their Effect in Improving Performances of Amorphous and Microcrystalline Silicon Solar Cells

Arvind Shah, Sylvie Faÿ

Doped ZnO layers deposited by low-pressure chemical vapour deposition technique have been studied for their use as transparent contact layers for thin-film silicon solar cells. Surface roughness of these ZnO layers is related to their light-scattering capa ...

2006

Semiconductor oxide based electrodes for the label-free electrical detection of DNA hybridization: Comparison between Sb doped SnO2 and CdIn2O4

Carlotta Guiducci

First results are reported regarding the design, fabrication and operation of a DNA biochip based on a semiconductor oxide electrode that employs label-free electrical detection of the DNA hybridization. The same process of DNA functionalisation, including ...

2006

Seeded Growth of Asymmetric Binary Nanocrystals Made of a Semiconductor TiO2 Rodlike Section and a Magnetic γ-Fe2O3 Spherical Domain

Raffaella Buonsanti

Asym. binary nanocrystals (BNCs), comprising one c-axis elongated anatase TiO2 section and one γ-Fe2O3 spherical domain attached together, are synthesized by heterogeneous nucleation of iron oxide onto the longitudinal facets of TiO2 nanorods in a ternary ...

2006

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