Guido Paolicelli

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The inertial sliding of physisorbed submonolayer islands on crystal surfaces contains unexpected information on the exceptionally smooth sliding state associated with incommensurate superlubricity and on the mechanisms of its disappearance. Here, in a joint quartz crystal microbalance and molecular dynamics simulation case study of Xe on Cu(111), we show(More)
Friction characteristics of graphene deposited on different substrates have been studied by atomic force microscopy (AFM). In particular, we compared mechanically exfoliated graphene transferred over Si/SiO₂ with respect to monolayer (ML) graphene grown in our laboratory by low temperature chemical vapor deposition on Ni(111) single crystal. Friction force(More)
The detection of the real photon beam trajectory as delivered to the users, by a third generation SR facility, is of paramount importance for the effectiveness of the most sensitive experimental measurements. Photon Beam Position Monitors (PBPM) have been developed for this purpose. The most common is the so-called blade-typemonitor which is based on the(More)
Ag and Ag@MgO core-shell nanoparticles (NPs) with a diameter of d = 3-10 nm were obtained by physical synthesis methods and deposited on Si with its native ultrathin oxide layer SiO x (Si/SiO x ). Scanning electron microscopy and transmission electron microscopy (TEM) images of bare Ag NPs revealed the presence of small NP aggregates caused by diffusion on(More)
D. J. Payne,1 R. G. Egdell,1,* G. Paolicelli,2 F. Offi,3 G. Panaccione,4 P. Lacovig,5 G. Monaco,6 G. Vanko,6 A. Walsh,7 G. W. Watson,7 J. Guo,8 G. Beamson,9 P.-A. Glans,10 T. Learmonth,10 and K. E. Smith10 1Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom 2CNR-INFM, National Research Center S3, Via Campi 213/a, I-41100(More)
1 Abstract In the latest generation of SR sources, local bump orbit feedback systems are under development for improving the stability of the delivered radiation. Photon Beam Position Monitors (PBPM) are being built as detectors of beam movements and as references for feedback systems. A new generation of PBPM’s for Undulator(More)
The tribological properties of metal-supported few-layered graphene depend strongly on the grain topology of the metal substrate. Inhomogeneous distribution of graphene layers at such regions led to variable landscapes with distinguishable roughness. This discrepancy in morphology significantly affects the frictional and wetting characteristics of the FLG(More)
The effect of temperature on the onset of movement of gold nanoclusters (diameter 27 nm) deposited on highly oriented pyrolytic graphite (HOPG) has been studied by atomic force microscopy (AFM) techniques. Using the AFM with amplitude modulation (tapping mode AFM) we have stimulated and controlled the movement of individual clusters. We show how, at room(More)
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