INVESTIGADORES
RUANO SANDOVAL Gustavo Daniel
artículos
Título:
Iron Nanoparticle Generation by He + Ion Bombardment
Autor/es:
POMIRO, FERNANDO; CANDIA, ADRIANA E.; MONTORO, SILVIA; PASSEGGI, MARIO C. G.; RUANO, GUSTAVO; FERRÓN, JULIO
Revista:
JOURNAL OF PHYSICAL CHEMISTRY C
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2017 vol. 121 p. 26117 - 26124
ISSN:
1932-7447
Resumen:
The effect of (1-4 keV) energetic He+ ion irradiation over clean pyrite substrates was studied by means of a multi-technique approach, including Scanning Tunneling Microscopy (STM), Scanning Tunneling Spectroscopy (STS), X-ray Photoelectron Spectroscopy (XPS), Ion Scattering Spectrometry (ISS) and Auger Electron Spectroscopy (AES). Using these different techniques, we were able to characterize with a great amount of details the nano-structuring process. Thus, meanwhile through STM we found that upon ion irradiation the surface becomes structured with particles in the nanometer range, through XPS and ISS we determined that these particles are mostly composed of metallic iron. Through STM we also found that surface roughness increases with ion energies and, using oxygen as marker we characterize through AES the in-depth iron distribution. Finally, through STS we found changes in the pyrite band gap induced by ion bombardment.
