Growth mode and self-organization of LuPc2 on Si(001)-2 x 1 vicinal surfaces: An optical investigation
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 86, no 11, 115413- p.Article in journal (Refereed) Published
We report an investigation of the initial growth and of the self-organization of lutetium biphthalocyanine LuPc2 on Si(001)-2 x 1 vicinal surfaces. Using surface-sensitive optical spectroscopies, namely, surface-difference-reflectance spectroscopy (SDRS) and reflectance-anisotropy spectroscopy (RAS), together with local-probe microscopies, we are able to propose a scenario for the growth mode up to about 20 nm. We demonstrate that the growth mode initially proceeds through the formation of a wetting layer, followed by the formation of clusters whose sizes increase while keeping a constant shape in which the molecules are inclined. Moreover, the LuPc2 molecules are self-organized along the step edges, and we are able to estimate that about 30% to 100% of the molecules are aligned when considering that the molecules are tilted by 45 degrees to 63 degrees with respect to the surface normal.
Place, publisher, year, edition, pages
2012. Vol. 86, no 11, 115413- p.
IdentifiersURN: urn:nbn:se:uu:diva-182508DOI: 10.1103/PhysRevB.86.115413ISI: 000308528200010OAI: oai:DiVA.org:uu-182508DiVA: diva2:560548