Berlin 2018 – scientific programme
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DS: Fachverband Dünne Schichten
DS 11: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...): Session II
DS 11.8: Talk
Tuesday, March 13, 2018, 11:30–11:45, H 0111
Growth of organic thin films on modified TiO2(110) surfaces — •Konrad Szajna1, Markus Kratzer2, Dominik Wrana1, Wojciech Bełza1, Benedykt Jany1, Jacob Genser2, Franciszek Krok1, and Christian Teichert2 — 1Marian Smoluchowski Institute of Physics, Jagiellonian University, Krakow 30-348, Poland — 2Institute of Physics, Montanuniversitaet Leoben, Franz Josef Straße 18, 8700 Leoben, Austria
The detailed growth morphology of vapor deposited para-hexaphenyl (6P) as model system of small organic molecules on modified TiO2(110) surfaces has been investigated by means of scanning probe microscopy. As substrates, atomically flat, air passivated and rippled ion beam modified TiO2(110) surfaces have been used. On pristine TiO2(110) crystalline needles consisting of flat lying 6P molecules are formed which extend along the [1-10] substrate direction. In contrast, on air exposed and ion beam modified surfaces island growth with an upright standing molecular configuration is favored. [1,2,3] The mechanisms that trigger the transition from flat lying to upright standing structures are discussed. Further the change in the stability of the 6P structures due to ion beam induced substrate rippling was tested by atomic force microscopy and is discussed.[3]
[1] M. Kratzer et al. PCCP 16, 26112 (2014)
[2] D. Wrana et al. JPCC 119, 17004 (2015)
[3] K. Szajna et al. JCP 145, 144703 (2016)