Optical-Spectroscopic Characterisation Laboratory

 

Veronica Valentini  -

 
 

Research Activities

Over the years, research activities in optical and spectroscopic characterization of different types of materials has allowed the development of expertise in a number of analytical techniques such as: Electronic Scanning Microscopy (SEM), IR, UV-vis spectroscopy and, in particular, Raman spectroscopy. This spectroscopy is a non-destructive optical characterization technique, which does not require sample pre-treatment. This technique is also extremely versatile and it is therefore suitable for the analysis of materials in all physical states: gas, liquid and solid. This spectroscopy is a very straightforward tool for identifying samples’ structures, either crystalline or amorphous, in film or as adsorbed species, through their vibrational "imprint". Utilising Raman spectroscopy, it is possible to obtain information on:

  • Chemical composition
  • Crystalline phases and phase transitions
  • Crystalline purity and structural disorder
  • Nano-structured systems dimensions
  • Stress and stress-induced effects
  • Defects and impurities

This spectroscopic technique over the years has been utilised for the characterization of samples of different nature, both produced at ISM and by third parties, such as:

  • Semiconductors;
  • Molecolules e adsorbates;
  • Crystals and amorphous solids (e.g. Si-based systems such as c-Si, a-Si, clays)
  • Thin films (e.g. diamond films, DLC)
  • nanostructured and porous materials (e.g. single layers and superstructures of porous Si, carbon-based systems such as: graphenes, graphene oxides, nanotubes; materials of catalytic interest);
  • carbon-based systems such as: graphenes, graphene oxide;   
  • nanotubes; materials of catalytic interest);
  • Organic materials (e.g. pharmaceutical molecules, catalysts);
  • Plastics / Coatings;
  • Various types of molecules adsorbed on surfaces
  • Materials of archaeological interest (e.g. tuffs in Etruscan tombs)
 
Relevant Publications

 

 

 
 
 

Instrumentation

Raman Dilor XY@RM

Collaborations

  • in addition to collaborations within the ISM and with other CNR institutes, a collaboration has been active with the Engineering Department and with the Chemical Sciences and Technologies Department of the University of Rome “Tor Vergata” since 2001.

SpecOpt Projects

  • E-RHIS - European Research Infrastructure Heritage Science +

    The Project aims to offer high-tech research infrastructures for the characterization of archaeological finds to the community active in the Read More
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