Low fluence ion irradiation of organic materials causes physical and chemical modifications that depend on the nature of the pristine materials and on the beam parameters. The knowledge of the microscopic mechanisms that induce the macroscopic modifications is able to produce the desired effect by a careful selection of the pristine material and of the beam parameters. Ion beam irradiation of ''biomaterials'' is currently the subject of many studies aimed to investigate these materials for both fundamental and applied reasons. Here we present the results of a combined XPS (X-ray Photoelectron Spectroscopy) and Raman study on thin films of glutathione bombarded with 250 keV He ions. The need for having a low molecular mass material arises from our plan to investigate the ion beam effects by means of techniques that follow the chemical evolution of the sample under ion bombardment such as mass spectrometry, photoelectron spectroscopy and Raman spectroscopy. In this respect a low molecular weight target, in principle, is easier to understand than one at high molecular mass.
A combined Raman and XPS study of the effects induced on glutathione by ion beam irradiation
COMPAGNINI, Giuseppe Romano;LICCIARDELLO, Antonino;
1996-01-01
Abstract
Low fluence ion irradiation of organic materials causes physical and chemical modifications that depend on the nature of the pristine materials and on the beam parameters. The knowledge of the microscopic mechanisms that induce the macroscopic modifications is able to produce the desired effect by a careful selection of the pristine material and of the beam parameters. Ion beam irradiation of ''biomaterials'' is currently the subject of many studies aimed to investigate these materials for both fundamental and applied reasons. Here we present the results of a combined XPS (X-ray Photoelectron Spectroscopy) and Raman study on thin films of glutathione bombarded with 250 keV He ions. The need for having a low molecular mass material arises from our plan to investigate the ion beam effects by means of techniques that follow the chemical evolution of the sample under ion bombardment such as mass spectrometry, photoelectron spectroscopy and Raman spectroscopy. In this respect a low molecular weight target, in principle, is easier to understand than one at high molecular mass.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
