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Gold nano-mesh synthesis by continuous-flow X-ray irradiation

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Hardening induced by radiation damage and helium in structural materials

Irradiation is known to lead to degradation of mechanical properties of materials. Structural materials for nuclear applications can be affected by helium produced by transmutations. The objectives of this work were: (a) to investigate the effects of He on ...

EPFL2015

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The work presented demonstrates the utilization of micro-contact printing of self-assembled monolayers (SAMs) of gold nanoparticles (NPs) to pattern the porous thin metallic film composing the top electrode of an ultra-fast capacitive relative humidity sen ...

Elsevier2015

The catalytic properties of Pd trigger a strong interest on the related catalysis by Au-Pd nanoparticles. However, the analysis of such phenomena was complicated so far by the presence of capping. Using x-ray irradiation, we could produce uncapped Au-Pd na ...

RSC Publishing2015

Modelling oriented investigations of primary radiation damage in ultra high purity Fe and FeCr alloys

Anna Prokhodtseva

In the quest of the structural materials for the future fusion reactor, it has been shown that ferritic/martensitic (F/M) steels are very promising candidates, with a good radiation resistance in terms of damage accumulation in the microstructure relative ...

EPFL2013

We successfully demonstrate the in situ formation by X-ray irradiation induced polymerization of a three-dimensional (3D) hydrogel based on poly(ethylene glycol) (PEG) diacrylate (PEG DA), with the option of heparin incorporation to enhance cell adhesion. ...

Royal Society of Chemistry2012

Size control of gold nanoparticles by intense X-ray irradiation: the relevant parameters and imaging applications

Giorgio Margaritondo

We report the analysis of a reducing-agent-free synthetic method based on intense X-ray irradiation in the presence of 11-mercaptoundecanoic acid (MUA) and their application in biomedical imaging. The method is very effective in controlling the size and si ...

2012

Imaging the cellular uptake of tiopronin-modified gold nanoparticles

Giorgio Margaritondo

Well-dispersed gold nanoparticles (NP) coated with tiopronin were synthesized by X-ray irradiation without reducing agents. High-resolution transmission electron microscopy shows that the average core diameters of the NPs can be systematically controlled b ...

Springer Verlag2011

We investigated iron oxide nanoparticles with two different surface modifications, dextran coating and cross-linked dextran coating, showing that their different internalization affects their capability to enhance radiation damage to cancer cells. The inte ...

Institute of Physics2010

Enhancement of cell radiation sensitivity by pegylated gold nanoparticles

Giorgio Margaritondo

Biocompatible Au nanoparticles with surfaces modified by PEG (polyethylene glycol) were developed in view of possible applications for the enhancement of radiotherapy. Such nanoparticles exhibit preferential deposition at tumor sites due to the enhanced pe ...

Institute of Physics2010

Monodisperse gold nanorods with high aspect ratio were synthesized by x-ray irradiation. Irradiation was first used to stimulate the creation of seeds. Afterward, nanorod growth was stimulated either by chemical reduction or again by x-ray irradiation. In ...

Institute of Physics2010