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Giorgio Margaritondo

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Publications associées (132)

The evolution of a dedicated synchrotron light source

Giorgio Margaritondo

2008

Hydrogen bubbles and the growth morphology of ramified zinc by electrodeposition

Giorgio Margaritondo

Real-time X-ray microscopy was used to study the influence of hydrogen-bubble formation on the morphology of ramified zinc electrodeposit. The experimental results show that when intense hydrogen bubbling occurs at high potential, the morphology of the ram ...

2008

Nondestructive Characterization by Advanced Synchrotron Light Techniques: Spectromicroscopy and Coherent Radiology

Giorgio Margaritondo

The advanced characteristics of synchrotron light has led in recent years to the development of a series of new experimental techniques to investigate chemical and physical properties on a microscopic scale. Although originally developed for materials scie ...

2008

Coupled tomography and distinct-element-method approach to exploring the granular media microstructure in a jamming hourglass

Michel Tsukahara, Thomas Liebling, Giorgio Margaritondo, Michaël Unser, Daniel Sage, Lionel Pournin, Marco Ramaioli, Vincent Gajdosik, Slobodan Mitrovic

We describe an approach for exploring microscopic properties of granular media that couples x-ray microtomography and distinct-element-method (DEM) simulations through image analysis. We illustrate it via the study of the intriguing phenomenon of instant a ...

APS2008

Low-frequency electromagnetic field effects on functional groups in human skin keratinocytes cells revealed by IR-SNOM

Giorgio Margaritondo, Dusan Vobornik

Human HaCaT cells, exposed for 24 h to a 1 mT (rms) 50 Hz sinusoidal magnetic field in a temperature-regulated solenoid, suffer detectable changes in their biochemical properties and shapes. By using infrared wavelength-selective scanning near-field optica ...

2008

Infrared Scanning Near-Field Optical Microscopy Below the Diffraction Limit

Giorgio Margaritondo

Infrared scanning near-field optical microscopy (IR-SNOM) is an extremely powerful analytical instrument since it combines IR spectroscopy's high chemical specificity with SNOM's high spatial resolution. In order to do this in the infrared, specialty chalc ...

2008

A coherent synchrotron X-ray microradiology investigation of bubble and droplet coalescence

Giorgio Margaritondo

A quantitative application of microradiology with coherent X-rays to the real-time study of microbubble and microdroplet coalescence phenomena, with specific emphasis on the size relations in three-body events, is presented. The results illustrate the rema ...

International Union of Crystallography2008

AMPA receptor imaging by infrared scanning near-field optical microscopy

Giorgio Margaritondo, Kai Johnsson, Harald Hirling, Michel Kropf, Johanna Generosi

Infrared scanning near-field optical microscopy is used to detect AMPA-type glutamate receptor clusters in hippocampal neuron cells. AMPA's GluR2-subunits were marked with the fluorophore Alexa488 and high-resolution micrographs were taken at 6.25 µm wavel ...

Wiley2008

3D experimental investigation of the microstructure of cement pastes using synchrotron X-ray microtomography (mu CT)

Giorgio Margaritondo, Amela Groso, Karen Scrivener, Emmanuel Gallucci, Marco Stampanoni

Cement pastes aged from 1 to 60 days were studied using synchrotron microtomography on the MS-X04SA beam line at the Swiss Light Source. This allowed three dimensional images to be obtained with a resolution approaching that of backscattered electron image ...

Pergamon-Elsevier Science Ltd2007

Fabrication of Freestanding Metallic Micro Hollow Tubes by Template-Free Localized Electrochemical Deposition

Giorgio Margaritondo

Electrochemical Society2007

Role of micropipes in the formation of pores at foreign polytype boundaries in SiC crystals

Giorgio Margaritondo

2007

Aqueous gold nanosols stabilized by electrostatic protection generated by X-ray irradiation assisted radical reduction

Giorgio Margaritondo

Elsevier2007

Structural properties of naked gold nanoparticles formed by synchrotron X-ray irradiation

Giorgio Margaritondo

The formation of colloidal unmodified (naked) gold nanoparticles is investigated by irradiation of a precursor solution with X-rays from a synchrotron source. An interesting morphological evolution as a function of exposure time, from cross-linked network- ...

International Union of Crystallography2007

E-beam lithography and electrodeposition fabrication of thick nanostructured devices

Giorgio Margaritondo

2007

X-ray bright-field imaging analyzes crystalline quality and defects of SiC wafers

Giorgio Margaritondo

International Union of Crystallography2007

Imaging of renal and prostate carcinoma with refractive index radiology

Giorgio Margaritondo

Having better edge enhancement and penetrating power, refractive index radiology is suitable for the imaging of weakly absorbing objects such as tissue specimens. In this study the potential of refractive index radiology was evaluated for the imaging of re ...

Wiley-Blackwell2007

Phase contrast X-ray imaging

Giorgio Margaritondo

In the last decade X-ray imaging based on phase contrast greatly advanced thanks to the use of unmonochromatic synchrotron hard X-rays. The recent advances are going beyond microradiology and microtomography to reach nanometre scale. This paper reviews bas ...

Inderscience2006

Synchrotron microradiography study on acute lung injury of mouse caused by PM2.5 aerosols

Giorgio Margaritondo, Yiming Li

In order to investigate FeSO4, ZnSO4 (the two of main metal compositions of Shanghai PM2.5 (particle matter with those aerodynamical diameter

Elsevier2006

Bright-field imaging of lattice distortions using x rays

Giorgio Margaritondo

American Institute of Physics2006

X-ray synthesis of nickel–gold composite nanoparticles

Giorgio Margaritondo

Elsevier2006

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