Facilities
Analytical Microscopy and Spectroscopy

ACROSS

General informations

Location
Department of Physics and Geology, Perugia, Italy
Main techniques and methods
Low Energy Electron Diffraction (LEED), Auger Electron Spectroscopy (AES), Reflection High Energy Electron Diffraction (RHEED), Ultra-violet Photoemission Spectroscopy (UPS)
Key instumentation
- UHV chamber for growth and in-situ structural (LEED, RHEED, AES) characterization of surfaces and ultrathin films
- UV source and electron energy analyzer

ACROSS is an experimental chamber equipped with a RHEED, a LEED and an AES system for the characterization of structural, physical and chemical properties of surfaces, ultrathin films and nanoarchitectures

Technical description

The UHV (Ultra High Vacuum) chamber hosts two multicell evaporators: both give the possibility to evaporate 3 different materials, one is a e-beam EPI evaporator for high temperature evaporants (for example metals such as Fe, Co, Ni, …), while the other one is for low temperature evaporants (below 500 °C, such as organic molecules). There is also a RHEED (Reflection High Energy Electron Diffraction) and a LEED (Low Energy Electron Diffraction) apparatus for checking the growth and the structure of the thin films. The LEED can operate also to perform AES (Auger Electron Spectroscopy) measurements to complement the structural studies with chemical information.

Development of new methods, instrumentation, software

We are upgrading the UHV chamber with an electron analyser and a UV (Ultra-violet) source. The data acquisition and analysis software will be implemented as well. We have also implemented routines to read out and analyse the data of the ALOISA beamline, in particular for the PED (PhotoElectron Diffraction) experiments.

Research Activity

The main research activity is the study of the growth and of the electronic and structural properties of surfaces and thin films (organic and inorganic), deposited on metals and semiconductors. In the last years the systems studied are metallorganic molecules (porphyrins, corroles, phthalocyanines, ...) deposited on coinage metals and on oxidized metals. Moreover, the research is also focused in the study of the growth, electronic and structural properties of blue phosphorous – a single layer of phosphorous grown on the Au(111). This system is a very interesting candidate as a substrate for energy harvesting related molecules. The research activity is run in the “Laboratorio Congiunto Superfici e Nanostrutture” using the experimental chamber ACROSS (Advanced ChambeR fOr Surface Studies) and at the ALOISA beamline in Trieste.

Projects

  • PRIN 2017, 2017KFY7XF, 2019-2022 
  •  "Corso formativo di tecniche di vuoto per le scuole superiori", 2021-2022

Main collaborations

  • University of Trieste, Italy
  • Elettra Sincrotrone Trieste, Italy
  • Polytechnic of Milano, Italy
  • University of Ljubljana, Slovenia
  • University of Bourgogne-Franche-Comté, Besançon, France
  • Centro de Física de Materiales-CSIC, San Sebastian, Spain

Laboratory Team

Key publications

Journal of Physical Chemistry C, 124-35:18993-19002, 2020 doi:10.1021/acs.jpcc.0c03395

Mn-Cu Transmetalation as a Strategy for the Assembly of Decoupled Metal-Organic Networks on Sn/Cu(001) Surface Alloys

MacHaín P., Fuhr J.D., Schneider S., Carlotto S., Casarin M., Cossaro A., Verdini A., Floreano L., Lingenfelder M., Gayone J.E., Ascolani H.
Journal of Physical Chemistry C, 124-36:19655-19665, 2020 doi:10.1021/acs.jpcc.0c06101

Role of the Metal Surface on the Room Temperature Activation of the Alcohol and Amino Groups of p-Aminophenol

Del Árbol N.R., Palacio I., Sánchez-Sánchez C., Otero-Irurueta G., Martínez J.I., Rodríguez L., Serrate D., Cossaro A., Lacovig P., Lizzit S., Verdini A., Floreano L., Martín-Gago J.A., López M.F.
Journal of Materials Chemistry C, 8-26:8876-8886, 2020 doi:10.1039/d0tc00946f

Molecular anchoring stabilizes low valence Ni(i)TPP on copper against thermally induced chemical changes

Sturmeit H.M., Cojocariu I., Jugovac M., Cossaro A., Verdini A., Floreano L., Sala A., Comelli G., Moro S., Stredansky M., Corva M., Vesselli E., Puschnig P., Schneider C.M., Feyer V., Zamborlini G., Cinchetti M.
Journal of Physical Chemistry C, 124-31:16918-16925, 2020 doi:10.1021/acs.jpcc.0c02125

Increase of Polymerization Yield on Titania by Surface Reduction

Abadia M., Vasseur G., Kolmer M., Zajac L., Verdini A., Ortega J.E., Floreano L., Rogero C., Brede J.
Journal of Physical Chemistry C, 124-21:11490-11498, 2020 doi:10.1021/acs.jpcc.0c02321

Substitution of Titanium for Magnesium Ions at the Surface of Mg-Doped Rutile

Dupont C., Jupille J., Bourgeois S., Le Fèvre P., Verdini A., Floreano L., Domenichini B.
Nanotechnology, 31-27, 2020 doi:10.1088/1361-6528/ab851e

Enhanced ambient stability of exfoliated black phosphorus by passivation with nickel nanoparticles

Caporali M., Serrano-Ruiz M., Telesio F., Heun S., Verdini A., Cossaro A., Dalmiglio M., Goldoni A., Peruzzini M.
Journal of Physical Chemistry C, 2020 doi:10.1021/acs.jpcc.0c01387

Vibronic Fingerprints of the Nickel Oxidation States in Surface-Supported Porphyrin Arrays

Stredansky M., Moro S., Corva M., Jugovac M., Zamborlini G., Feyer V., Schneider C.M., Cojocariu I., Sturmeit H.M., Cinchetti M., Verdini A., Cossaro A., Floreano L., Vesselli E.
Journal of Physical Chemistry C, 2019 doi:10.1021/acs.jpcc.9b08430

2D Cu-TCNQ Metal-Organic Networks Induced by Surface Alloying

Fuhr J.D., Robino L.I., Rodrĺguez L.M., Verdini A., Floreano L., Ascolani H., Gayone J.E.
Physical Review Materials, 4-2, 2020 doi:10.1103/PhysRevMaterials.4.025801

Distinct behavior of localized and delocalized carriers in anatase TiO2 (001) during reaction with O2

Bigi C., Tang Z., Pierantozzi G.M., Orgiani P., Das P.K., Fujii J., Vobornik I., Pincelli T., Troglia A., Lee T.-L., Ciancio R., Drazic G., Verdini A., Regoutz A., King P.D.C., Biswas D., Rossi G., Panaccione G., Selloni A.
Applied Surface Science, 504, 2020 doi:10.1016/j.apsusc.2019.144343

Evaluation of molecular orbital symmetry via oxygen-induced charge transfer quenching at a metal-organic interface

Cojocariu I., Sturmeit H.M., Zamborlini G., Cossaro A., Verdini A., Floreano L., D'Incecco E., Stredansky M., Vesselli E., Jugovac M., Cinchetti M., Feyer V., Schneider C.M.