BACH
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Research highlights | Publications
Stability of van der Waals Pt-Telluride thin filmsPhotoemission provides insight into the synthesis conditions of Pt3Te4, and Pt2Te2 by thermal treatment starting from PtTe2 thin films. 
Impact of thermal gas treatment of Li-rich Mn-based cathode materials for Li-ion batteriesInsights on the mechanism responsible for improved stability of high-energy-density lithium rich layered structure Mn based cathodes upon double gas treatment has been obtained by quasi in situ advanced spectroscopic techniques 
The NESSIAS effect at Si nanostructuresSi nanowells embedded in SiO2- and Si3N4 show an electronic structure shift with respect to the vacuum level. This NESSIAS effect gives origin to intrinsic Si type II homojunctions which should remain fully functional down to extremely low temperatures, useful for peripheral electronics in qbit manipulation. 
Lithium induces the reorientation of few-layer MoS2 filmsMeasurements at the BACH beamline attest to the presence of lithium in interstitial sites in Li-MoS2 films prepared by a new approach. 
Atomically-Precise Texturing of Hexagonal Boron Nitride Nanostripes
h-BN grown on a curved Rh crystal forms a continuous atomically-thin carpet revealing a transformation from 2D to 1D electronic band structure. This novel approach to nanopattering through epitaxial growth has practical technological implications.
Boron nitride-graphene in-plane hexagonal heterostructure in oxygen environmentInsights into the progressive and subsequent intercalation of oxygen, selective etching of graphene and oxidation of boron in a quasi-free standing Gr-h-BN monolayer during oxygen exposure. 
Improving the Efficiency of Gallium Telluride through Defects Engineering and Interfacing with its Native OxideThe formation of a nanoscale sub-stoichiometric wide-band-gap Ga2O3 skin over narrow-band-gap gallium telluride upon air exposure is beneficial for electrocatalysis, photocatalysis, and gas sensing. 
Soft x-rays spectroscopies in liquids at BACHWe have developed suitable cells to perform soft x-ray spectroscopy in the presence of liquids and reagent gases at ambient pressure: two types of static cells working in transmission or in fluorescence modes, and an electrochemical flow cell which allows to carry out cyclic voltammetry in situ, electrochemical deposition on a working electrode and to study chemical reactions in-operando conditions. Rev. Sci. Instrum. 92, 015115 (2021) https://doi.org/10.1063/5.0025326 Read More
Easy Hydrogenation and dehydrogenation of a hybrid graphene and hexagonal boron nitride monolayerInsights into the mechanism of hydrogenation and dehydrogenation of a quasi-free standing Gr-h-BN monolayer are achieved by temperature-programmed photoemission. 
Altering properties of transition metal dichalcogenides by bi-intercalationAdvanced synchrotron radiation spectroscopy helped to gain insight into the origins of phase transitions in Cu and Ni doped TiSe2 dichalcogenide.
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Branchline A: MultiSpectroscopy endstation
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In the UHV (low 10-10 mbar) endstation of the BRANCH A it is possible to perform a multi-spectroscopy investigation with photoemission UPS/XPS (including polarization and photon energy-dependent ultra-violet (UV) and soft-x SX-ARPES, RESPES and energy-dependent Photoelectron DIffraction PhD, temperature-progarmmed photoemission TP-XPS), x-ray absorption XAS (TEY,PEY,TFY,PFY) including GAP SCAN acquisitions, x-ray emission XES and x-ray magnetic circular dichroism XMCD (in remanence in the branch A). A LEED and several electron beam evaporators are available to deposit selected metals on the sample surface at different temperatures. A sample-preparation UHV chamber, directly connected to the EndstationA can be used to grow thin films of metals or metal oxides and deposit organic/inorganic molecules on solid surfaces for in-situ investigations. High-partial pressure gas exposures (up to 100 torr) and sample annealing are also possible in a dedicated chamber. Connection of vacuum suitcases is also feasible. Samples in static liquid environment can also be measured in fluorescence yield. |
VG-Scienta R3000 analyser (RESPES, TP-XPS, Dichroic ARPES, EUV ARPES, SX-ARPES, RES-ARPES, fast XPS and UPS, PhD, PY-XAS)
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A VG-Scienta hemispherical electron analyzer (CNR) has been installed in mid December 2011 on the branch A, replacing the VSW 150 mm analyser (Elettra - Sincrotrone Trieste S.C.p.A.). 
Pump-Probe Time resolved XAS
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The experimental setup of the BRANCH A can also combine 
“Gap/Phase Energy scan” acquisition mode (synchronization of the undulator gap and phase with the monochromator) has been implemented to XAS, XMCD, RESPES, ARPES and PhD. This has been possible thanks to the collaboration with undulator group (D. Millo, ST), Undulator server group (L. Pivetta, L. Scafuri, ST), A. Barla (ISM-CNR), L. Stebel (ST)