Giorgio Margaritondo

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Related publications (132)

Synchrotron light in semiconductor research: Three decades of revolution

Since the late 1960s, synchrotron-based experimental techniques have been playing a key role in semiconductor research. Major milestones include the observation of intrinsic and extrinsic surface and interface states, the study of interface formation proce ...

2006

Spectroscopic infrared near-field microscopy and x-ray reflectivity studies of order and clustering in lipid membranes

Giorgio Margaritondo, Johanna Generosi

Lipid membranes were studied by infrared scanning near-field optical microscopy at several wavelengths and by x-ray reflectivity. Together with the x-ray data, the optical images indicate the formation of locally ordered multiple bilayers, and the topograp ...

AIP American Institute of Physics2006

Phase contrast radiography of Lewy bodies in Parkinson disease

Giorgio Margaritondo

Parkinson's disease (PD), defined as a neurodegenerative disorder, is characterized by the loss of dopaminergic neurons and the presence of Lewy bodies in neurons. Morphological study of Lewy bodies is important to identify the causes and the processes of ...

Elsevier2006

Real-time radiology in the microscale

Giorgio Margaritondo

We present several examples of the applications of a novel microradiology approach based on phase contrast enhancement using unmonochromatized synchrotron X-rays. The approach-mostly implemented and realized at the International Consortium on Phase Contras ...

2005

Explaining the physics of tsunamis to undergraduate and non-physics students

Giorgio Margaritondo

After the recent devastating tsunami in southern Asia, I tried to find a simple way to present the physics of this phenomenon to students-in particular, the origin of the dispersion relation and the consequent wave properties. Being unable to locate a suit ...

2005

Localized electrochemical deposition of copper monitored using real-time X-ray microradiography

Giorgio Margaritondo

We have developed a novel strategy for localized electrochemical deposition (LECD) to improve both the lateral resolution of the process and the porosity of the fabricated high-aspect-ratio microstructures. The strategy is based on accurately controlling t ...

2005

Magnetite: Raman study of the high-pressure and low-temperature effects

Helmuth Berger, László Forró, Giorgio Margaritondo

We report the results of a low-temperature (300 K-15 K) high-pressure (up to 22 GPa) Raman study of the Verwey transition in magnetite (Fe3O4). We use additional Raman modes observed below the Verwey transition to determine how the transition temperature c ...

2005

Real-time radiology in the microscale

Giorgio Margaritondo

We present several examples of the applications of a novel microradiology approach based on unmonochromatized synchrotron x-rays. The approach - mostly implemented on the ICPCIR (International Consortium on Phase Contrast Imaging and Radiology) Beamline at ...

2005

Comparison of unmonochromatized synchrotron radiation and conventional X-rays in the imaging of mammographic phantom and human breast specimens: A preliminary result

Giorgio Margaritondo

A simple imaging setup based on the principle of coherence-based contrast X-ray imaging with unmonochromatized synchrotron radiation was used for studying mammographic phantom and human breast specimens. The use of unmonochromatized synchrotron radiation s ...

2005

Synchrotron refractive-index microradiography of human liver cancer tissue

Giorgio Margaritondo, Yiming Li

Three human liver tissue samples (similar to 5 mm x 40 mm x 20 mm) were excised from a cancer patient's liver during surgery. The microradiology analysis was performed with a non-standard approach on a synchrotron. High-resolution refractive-index edge-enh ...

2005

Spectroscopic infrared scanning near-field optical microscopy (IR-SNOM)

Giorgio Margaritondo, Dusan Vobornik

Scanning near-field optical microscopy (SNOM or NSOM) is the technique with the highest lateral optical resolution available today, while infrared (IR) spectroscopy has a high chemical specificity. Combining SNOM with a tunable IR source produces a unique ...

Elsevier2005

Semiconductors, General Properties

Giorgio Margaritondo

The main characteristics of semiconducting materials are briefly reviewed. First, semiconductors are treated in the context of the one-electron band structure defining the differences with respect to metallic conductors. The same framework is then used to ...

Elsevier2005

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