High-resolution molecular images of rubrene single crystals obtained by frequency modulation atomic force microscopy

Minato, Taketoshi; Aoki, Hiroto; Fukidome, Hirokazu; Wagner, Thorsten; Itaya, Kingo
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p093302
Academic Journal
Frequency modulation atomic force microscopy (FM-AFM) was employed to study molecular structures of rubrene single crystals in ultrahigh vacuum. Molecularly flat and extraordinarily wide terraces were extended over the width of more than a few micrometers with monomolecular steps. Molecular packing arrangements and internal structures were revealed by FM-AFM. The unit cell determined by FM-AFM was consistent with the lattice parameters of bulk crystal within the experimental error, suggesting that the surface structure of rubrene is not reconstructed.


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