Atom-resolved surface chemistry using scanning tunneling microscopy
Abstract
We use scanning tunneling microscopy to investigate the reactivity of the dangling-bond states of Si(111)-(7×7). The reaction with NH3 is used as a prototype. We find that Si rest atoms are more reactive than Si adatoms and that center adatoms are more reactive than corner adatoms. Using atom-resolved electronic spectra, we probe the dangling-bond states on both clean and NH3-exposed surfaces. We find significant interactions and charge transfer between sites which strongly influence surface reactivity.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1988
- DOI:
- 10.1103/PhysRevLett.60.1049
- Bibcode:
- 1988PhRvL..60.1049W
- Keywords:
-
- 61.16.Di;
- 73.20.At;
- 82.65.Jv;
- Surface states band structure electron density of states