Self-assembly of organic semiconductor nanostructures via organic solid-solid wetting deposition. Organic Semiconductor Group Dr. Frank Trixler
Organic Semiconductor Group Dr. Trixler
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Low-Dimensional Crystal Engineering

 
STM image of a supramolecular bilayer of the organic semiconductor quinacridone graphite, grown via OSWD. Nanochain width: 1.6 nm. © F. Trixler.

We grow one-dimensional (1D) nanostructures and two-dimensional (2D) supramolecular crystals of organic semiconductors on substrates under ambient conditions directly from three-dimensional (3D) organic crystals. Our approach does not require dissolving, melting or evaporating of the  source crystals and is based on organic solid–solid wetting deposition (OSWD).

We exemplify our approach by using the pigment quinacridone (QAC). Scanning tunnelling microscopy (STM) investigations show that the structures of the resulting 2D crystals are similar to the chain arrangement of the alpha and beta QAC polymorphs and are independent of the 3D source crystal polymorph (gamma). Furthermore, distinct 1D chains can be produced systematically.

Publication:

Growing low-dimensional supramolecular crystals directly from 3D particles.
A. Eberle, A. Nosek, J. Büttner, T. Markert and F. Trixler.
CrystEngComm 19(10), 1417-1426 (2017).
DOI: 10.1039/c6ce02348g


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