Influence of substrate orientation on the formation of ordered copper phthalocyanine overlayers on InAs

STM and XRD studies of the adsorption and assembling structures of phthalocyanine and porphyrin

“…As for strong molecule-substrate interactions, the symmetry of the substrate is known generally to affect the symmetry of the epitaxial organic film, leading to distortion of the molecular lattice so as to achieve optimal alignment or commensurability with the substrate lattice, as reported in the case of copper phthalocyanine on a number of semiconductor surfaces. 23 In the present system, the observed coexistence of the nearly close-packed and quadratic arrangement is direct evidence of the respective effect of the molecule-molecule and molecule-substrate interactions. The observed quadratic symmetry is an indication of relatively weak molecule-substrate interaction.…”

Adlayer structure of octa‐alkoxy‐substituted copper(II) phthalocyanine on Au(111) by electrochemical scanning tunneling microscopy

“…Meanwhile, the hexagonal arrangement of CuPc(OC 8 H 17 ) 8 might result from compromised interactions to achieve the best fit with the underlying threefold symmetric lattice, where the flexible alkyl chains would have translated and rotated. This was similar to the case of epitaxial growth of copper phthlocyanines on the semiconductor surface (Cox et al, 1999).…”

Growth and vibrational properties of PTCDA thin films on InSb(111)A

“…It is most easily achieved by passivating the dangling bonds of the semiconductor surface prior to molecular thin film growth [3]. However, recent reports have shown that some molecules, including various phthalocyanines and perylenes, also adopt ordered structures on unpassivated III-V semiconductor substrates [4][5][6][7][8][9][10]. The implication in these systems is that the molecule-substrate interaction must be sufficiently weak to allow significant lateral diffusion of the molecules across the surface and formation of an ordered thin film structure.…”