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Nucleation and growth of thin films of rod-like conjugated molecules.

Authors
  • Hlawacek, Gregor
  • Teichert, Christian
Type
Published Article
Journal
Journal of Physics Condensed Matter
Publisher
IOP Publishing
Publication Date
Apr 10, 2013
Volume
25
Issue
14
Pages
143202–143202
Identifiers
DOI: 10.1088/0953-8984/25/14/143202
PMID: 23478790
Source
Medline
License
Unknown

Abstract

Thin films formed from small molecules are rapidly gaining importance in different technological fields. To explain their growth, methods developed for zero-dimensional atoms as the film-forming particles are applied. However, in organic thin-film growth the dimensionality of the building blocks comes into play. Using the special case of the model molecule para-Sexiphenyl, we will emphasize the challenges that arise from the anisotropic and one-dimensional nature of building blocks. Differences or common features with other rod-like molecules will be discussed. The typical morphologies encountered for this group of molecules and the relevant growth modes will be investigated. Special attention is given to the transition between a flat-lying and upright orientation of the building blocks during nucleation. We will further discuss methods to control the molecular orientation and describe the involved diffusion processes qualitatively and quantitatively.

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