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Comparative structural and electronic studies of hydrogen interaction with isolated versus ordered silicon nanoribbons grown on Ag(110)

In English

Författare

  • M. E. Davila
  • A. Marele
  • P. De Padova
  • I. Montero
  • Franz Hennies
  • Annette Pietzsch
  • M. N. Shariati
  • J. M. Gomez-Rodriguez
  • G. Le Lay

Summary, in English

We have investigated the geometry and electronic structure of two different types of self-aligned silicon nanoribbons (SiNRs), forming either isolated SiNRs or a self-assembled 5 x 2/5 x 4 grating on an Ag(110) substrate, by scanning tunnelling microscopy and high resolution x-ray photoelectron spectroscopy. At room temperature we further adsorb on these SiNRs either atomic or molecular hydrogen. The hydrogen absorption process and hydrogenation mechanism are similar for isolated or 5 x 2/5 x 4 ordered SiNRs and are not site selective; the main difference arises from the fact that the isolated SiNRs are more easily attacked and destroyed faster. In fact, atomic hydrogen strongly interacts with any Si atoms, modifying their structural and electronic properties, while molecular hydrogen has first to dissociate. Hydrogen finally etches the Si nanoribbons and their complete removal from the Ag(110) surface could eventually be expected.

Publiceringsår

2012

Språk

Engelska

Publikation/Tidskrift/Serie

Nanotechnology

Volym

23

Issue

38

Dokumenttyp

Artikel i tidskrift

Förlag

IOP Publishing

Ämne

  • Nano Technology

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0957-4484