Carlo Mariani

Sapienza University of Rome

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Maria Grazia Betti

Sapienza University of Rome

177

U. del Pennino

University of Modena and Reggio Emilia

A. Ruocco

Roma Tre University

G. Cavoto

Sapienza University of Rome

Ilaria Rago

Istituto Nazionale di Fisica Nucleare, Sezione di Roma I

V. Corradini

Istituto Nanoscienze

Luca Gavioli

Università Cattolica del Sacro Cuore

Valentina De Renzi

University of Modena and Reggio Emilia

Roberto Biagi

University of Modena and Reggio Emilia

Yoshikazu Ito

University of Tsukuba

Cooperative Institutions

Sapienza University of Rome

128

Centre National de la Recherche Scientifique

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso

AREA Science Park

Istituto Nazionale per la Fisica della Materia

University of Amsterdam

Istituto Nazionale di Fisica Nucleare

University of Modena and Reggio Emilia

University of Milan

National Interuniversity Consortium for the Physical Sciences of Matter

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Cesium-induced electronic states and space-charge-layer formation in Cs/InSb(110) interface

Physical review. B, Condensed matter (1996)

Maria Grazia Betti Roberto Biagi U. del Pennino Carlo Mariani M. Pedio

We report a study of the electronic properties of Cs overlayers on the narrow-band-gap III-V semiconductor InSb(110) as determined by means of photoemission and high-resolution electron-energy-loss spectroscopy. The electric and electronic properties of Cs-deposited on InSb(110) present two distinguishable phases, which can be related to the morphological transition observed in the scanning tunneling microscopy from one-dimensional chains to the two-dimensional (2D) Cs layer. The earlier stages of Cs adsorption induce an accumulation layer, while an additional Cs deposition results in a depletion of carriers in coincidence with the appearance of Cs-induced states in the semiconductor gap. When a 2D layer of cesium is formed on the InSb(110) surface, the interface is insulating with the surface band gap at 0.65 eV, larger than the underlying InSb bulk gap (0.175 eV at room temperature). \textcopyright{} 1996 The American Physical Society.

Depletion region

Caesium

10.1103/physrevb.53.13605

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Citations (22)

TPS VERIFICATION OF ELECTRON BEAMS IN NOT STANDARD GEOMETRY

Physica Medica (2023)

E. Pierpaoli Laura A. M. D’Angelo Carlo Mariani M. Canali F. Toscanelli

10.1016/j.ejmp.2023.103011

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Citations (0)

Towards free-standing graphane: atomic hydrogen and deuterium bonding to nano-porous graphene

Nanotechnology (2020)

Mahmoud Mohamed Saad Abdelnabi Elena Blundo Maria Grazia Betti G. Cavoto E. Placidi

Graphane is formed by bonding hydrogen (and deuterium) atoms to carbon atoms in the graphene mesh, with modification from the pure planar sp2 bonding towards an sp3 configuration. Atomic hydrogen (H) and deuterium (D) bonding with C atoms in fully free-standing nano porous graphene (NPG) is achieved, by exploiting low-energy proton (or deuteron) non-destructive irradiation, with unprecedented minimal introduction of defects, as determined by Raman spectroscopy and by the C 1s core level lineshape analysis. Evidence of the H- (or D-) NPG bond formation is obtained by bringing to light the emergence of a H- (or D-) related sp3-distorted component in the C 1s core level, clear fingerprint of H-C (or D-C) covalent bonding. The H (or D) bonding with the C atoms of free-standing graphene reaches more than 1/4 (or 1/3) at% coverage. This non-destructive H-NPG (or D-NPG) chemisorption is very stable at high temperatures up to about 800 K, as monitored by Raman and x-ray photoelectron spectroscopy, with complete healing and restoring of clean graphene above 920 K. The excellent chemical and temperature stability of H- (and D-) NPG opens the way not only towards the formation of semiconducting graphane on large-scale samples, but also to stable graphene functionalisation enabling futuristic applications in advanced detectors for the β-spectrum analysis.

Graphane

Chemisorption

10.1088/1361-6528/abbe56

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Citations (16)

Electrochemical characteristics of iron oxide nanowires during lithium-promoted conversion reaction

Journal of Power Sources (2014)

Inchul Hong M. Angelucci Roberta Verrelli Maria Grazia Betti S. Panero

Nanowire battery

10.1016/j.jpowsour.2014.01.052

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Citations (25)

Off-label use of teriparatide for the treatment of a vertebral burst fracture in a young patient: A case report and literature review

Trauma Case Reports (2025)

Tiziano Villa Vincenzo Zottola Carlo Mariani Andrea Enrico Borgonovo Luciano Redenti

We describe a case of L2 vertebral burst fracture in a 40-year-old male patient without any other comorbidities due to a ground-fall from horse. Despite surgical intervention with L1-L3 spine fusion was indicated as the treatment of choice since no fracture healing was visible on CT after 40 days post trauma, a conservative off-label therapy was decided with 5-month administration of teriparatide and vitamin D‑calcium supplementation together with nocturnal pulsed electro-magnetic field. Complete fracture healing was obtained after 5 months. This is the first report of successful off-label use of teriparatide together with pulsed electro-magnetic field for the treatment of a burst vertebral fracture without surgical intervention in a young patient.

Teriparatide

Burst fracture

10.1016/j.tcr.2025.101127

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Citations (0)

Photoemission investigation of the alkali-metal-induced two-dimensional electron gas at theSi(111)(1×1):Hsurface

Physical review. B, Condensed matter (2003)

Roberto Biagi Paolo Fantini Valentina De Renzi Maria Grazia Betti Carlo Mariani

We investigate the formation of a two-dimensional electron gas (2DEG) at the hydrogen-passivated silicon (111) surface exposed to tiny amounts of alkali metals (K and Cs) by means of high-resolution ultraviolet photoemission spectroscopy. The accumulation layer derives from the quantization and filling of bulk states located around the conduction-band minimum. Direct photoemission from these states results in a well-defined and structureless feature, which becomes huge when the alkali metal is deposited at low temperature (150 K), indicating a much higher charge transfer associated with the growth at low temperature. Its shape is characterized by a tail which is attributed to the broadening of the 2DEG density of states due to the random fields set up by the ionized alkali metal at the surface, providing direct experimental evidence of tailing of two-dimensional subbands at a free semiconductor surface.

Inverse photoemission spectroscopy

10.1103/physrevb.67.155325

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Citations (6)

Electronic properties of the Bi/Si(100) interface

Surface Science (1998)

Luca Gavioli Maria Grazia Betti Carlo Mariani

Dangling bond

Band bending

10.1016/s0039-6028(98)00203-9

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Citations (6)

Epitaxial continued-layer structure of Sb on GaAs(110) as observed by grazing-incidence x-ray diffraction

Physical review. B, Condensed matter (1994)

Maria Grazia Betti Carlo Mariani N. Jedrecy R. Pinchaux A. Ruocco

The atomic geometry of the Sb/GaAs(110) interface has been determined by means of a grazing-incidence x-ray-diffraction study. The in-plane coordinates of the Sb atoms on GaAs(110) are found in perfect agreement with an epitaxial continued-layer structure and exclude an epitaxial on-top structural model. The chains of Sb atoms along the [11\ifmmode\bar\else\textasciimacron\fi{}0] direction are characterized by a Sb-Sb bond length of 2.80 \AA{}, close to the covalent Sb-Sb bulk value. The stable (1\ifmmode\times\else\texttimes\fi{}1)-Sb/GaAs(110) interface presents a highly ordered structure, with a coherent domain size of 800 \AA{}, larger than for the clean GaAs surface (\ensuremath{\sim}600 \AA{}), indicating an ordering role of antimony for the GaAs(110) surface.

Bar (unit)

10.1103/physrevb.50.14336

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Citations (23)

Interaction of InP(110) with atomic hydrogen: a stretching mode investigation

Journal of Electron Spectroscopy and Related Phenomena (1993)

U. del Pennino Carlo Mariani A. Amoddeo F. Proix C.A. Sébenne

Overlayer

Cleavage (geology)

10.1016/0368-2048(93)80114-2

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Citations (10)

Electronic Structure Evolution during the Growth of Graphene Nanoribbons on Au(110)

The Journal of Physical Chemistry C (2016)

Ada Della Pia Giulia Avvisati Oualid Ourdjini Cláudia Cardoso Daniele Varsano

Surface-assisted polymerization of molecular monomers into extended chains can be used as the seed of graphene nanoribbon (GNR) formation, resulting from a subsequent cyclo-dehydrogenation process. By means of valence-band photoemission and ab initio density-functional theory (DFT) calculations, we investigate the evolution of molecular states from monomer 10,10′-dibromo-9,9′bianthracene (DBBA) precursors to polyanthryl polymers, and eventually to GNRs, as driven by the Au(110) surface. The molecular orbitals and the energy level alignment at the metal–organic interface are studied in depth for the DBBA precursors deposited at room temperature. On this basis, we identify a spectral fingerprint of C–Au interaction in both DBBA single-layer and polymerized chains obtained upon heating. Furthermore, DFT calculations help us by evidencing that GNRs interact more strongly than DBBA and polyanthryl with the Au(110) substrate, as a result of their flatter conformation.

10.1021/acs.jpcc.5b11884

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Citations (18)