Spectroscopy of Adsorbates and the Role of Interfacial Interactions

  • Guido Fratesi
  • Elena Molteni
  • Giovanni Onida
Conference paper


We present two test cases showing how electronic and optical spectroscopy techniques and their theoretical understanding by first principles can provide information on the strength of the adsorbate-substrate electronic interaction at interfaces. Results of electronic band structure calculations for two-dimensional silicon sheets (“silicene”) grown on silver are shown, pointing out that the interaction with the metal substrate is strong enough as to disrupt many of the exceptional properties computed for the free-standing material, or to mitigate the differences between various two-dimensional allotropes. The optical properties of silicon surface functionalized by nucleobase molecules are then discussed. Calculations predict that chemical sensitivity of spectra to molecular modifications can be overwhelmed by variations in the substrate response as induced by the adsorbates.


Adsorption Spectroscopy First-principle simulations DFT Silicene Si surfaces 



E.M. acknowledges financial support from Regione Autonoma della Sardegna under Project R.A.S. L.R. 07/08/2007 CRP-26666, and from Fondazione di Sardegna under Project UniCa “PRID 2015”. The authors acknowledge the CINECA award under the ISCRA initiative, for the availability of high-performance computing resources and support (projects HP10CDF3LP and HP10CESYLM). G.O. acknowledges ETSF-Italy for computational resources [24].


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© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Dipartimento di Fisica “Aldo Pontremoli”Università degli Studi di MilanoMilanItaly

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