Nabbefeld, Tobias; Wiethoff, Christian; Meyer zu Heringdorf, Frank; Horn-von Hoegen, Michael:

Silver Induced Faceting of Si(112)

In: Applied Physics Letters, Jg. 97 (2010) ; Nr. 4, S. 41905 (3p)
ISSN: 1077-3118, 0003-6951
Zeitschriftenaufsatz / Fach: Physik
Fakultät für Physik » Experimentalphysik
Si nanowires grown in ultrahigh vacuum by metal-catalyzed vapor-liquid-solid epitaxy are known to exhibit sidewalls with {112}-type orientation. For some metals the sidewalls show pronounced faceting. Ag induced faceting on Si(112) surfaces was studied in situ by spot-profile-analyzing low energy electron diffraction and ex situ atomic force microscopy. The (112) surface decomposes into (115)- and (111)-(math×math)-facets, both of which are Ag terminated. The width of the facets is kinetically limited and varies between 6 nm at T<550 °C and 30 nm at T = 690 °C.