Characterization of individual molecular adsorption geometries by atomic force microscopy: Cu-TCPP on rutile TiO2 (110)

The Journal of Chemical Physics
Res JöhrThilo Glatzel

Abstract

Functionalized materials consisting of inorganic substrates with organic adsorbates play an increasing role in emerging technologies like molecular electronics or hybrid photovoltaics. For such applications, the adsorption geometry of the molecules under operating conditions, e.g., ambient temperature, is crucial because it influences the electronic properties of the interface, which in turn determine the device performance. So far detailed experimental characterization of adsorbates at room temperature has mainly been done using a combination of complementary methods like photoelectron spectroscopy together with scanning tunneling microscopy. However, this approach is limited to ensembles of adsorbates. In this paper, we show that the characterization of individual molecules at room temperature, comprising the determination of the adsorption configuration and the electrostatic interaction with the surface, can be achieved experimentally by atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). We demonstrate this by identifying two different adsorption configurations of isolated copper(ii) meso-tetra (4-carboxyphenyl) porphyrin (Cu-TCPP) on rutile TiO2 (110) in ultra-high vacuum. The local contact potential di...Continue Reading

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Citations

Jul 19, 2016·The Journal of Physical Chemistry Letters·Iris HehnEgbert Zojer
Jun 6, 2019·Beilstein Journal of Nanotechnology·Sara FreundThilo Glatzel
Feb 15, 2018·Beilstein Journal of Nanotechnology·Sara FreundThilo Glatzel
Feb 2, 2017·Beilstein Journal of Nanotechnology·Piotr OlszowskiMarek Szymonski
Feb 2, 2017·Beilstein Journal of Nanotechnology·Jakub S Prauzner-BechcickiMarek Szymonski
Jun 20, 2020·Beilstein Journal of Nanotechnology·Lukasz BodekBartosz Such
May 6, 2016·Nanotechnology·Nicolas PiletJoerg Raabe

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