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@article{faucris.120248964,
abstract = {α,ω-Functionalised oligothiophenes are promising materials for organic field effect transistors due to their high degree of molecular ordering, crystallinity and π-π stacking. We employ several complementary microspectroscopic probes to investigate the formation of thermally evaporated films of 5,5‴-bis(N-acetamido-2-ethyl)-2,2′:5′,2″:5″,2‴quaterthiophene on inert substrates. These films were found to grow in a mixed fashion, featuring layer-by-layer domains with thicknesses of several monolayers and needle-shaped three-dimensional crystals. Detailed analysis of atomic force microscopy (AFM) and photoluminescence microscopy reveals the micro- and nanomorphology of the films. Linear dichroism in the near edge x-ray absorption fine structure and polarisation-dependent laser excitation corroborate the findings of AFM, i.e., upright standing molecules in the multilayer regime. The shape of the 3-dimensional crystallites and multilayer domains indicates strongly anisotropic growth favoured by the herringbone-arrangement of the thiophene moieties and additional stabilisation by hydrogen bonding of the acetamide end groups.},
author = {Zeilmann, Nina and Rösner, Benedikt and Späth, Andreas and Schmidt, Ute and Fink, Rainer},
doi = {10.1016/j.tsf.2015.03.066},
faupublication = {yes},
journal = {Thin Solid Films},
keywords = {Quaterthiophene; Organic field effect transistor; Confocal Raman microscopy; Near edge x-ray absorption fine structure spectroscopy; Scanning transmission x-ray microscopy},
pages = {108-114},
peerreviewed = {Yes},
title = {{Nanomorphology} in thin films of acetamide end-functionalised quaterthiophene},
volume = {583},
year = {2015}
}