This title appears in the Scientific Report : 2014 

Submolecular imaging with single particleatomic force sensors
Kichin, Georgy (Corresponding Author)
Funktionale Nanostrukturen an Oberflächen; PGI-3
Jülich Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag 2014
140 pp
RWTH Aachen, Diss., 2014
Dissertation / PhD Thesis
Schriften des Forschungszentrums Jülich, Reihe Schlüsseltechnologien / Key Technologies 87
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Scanning probe methods with decorated tips is a new trend in surfacestudy. An application of complex probe like a tip with an attached singlemolecule or single atom allows to get new details about the surface properties.It has been shown that the scanning tunnelling hydrogen microscopy(STHM) approach can reach atomic scale resolution and reveals intermolecularinteractions. Because of the complexity, this new rapidly developing areais not yet fully understood.In this work systematic studies of tips decorated with Xe, H2, D2, CO,CH4 was carried out. The tip with a single atom or a single molecule creates asingle particle sensor that simultaneously performs the function of an atomicscaleforce sensor and a signal transducer, which couples the short-rangeforce acting on the tip to the tunnelling conductance of the junction. Insome cases the sensor-transducer function of the decorated STM tips canbe quantitatively calibrated. Differences in the performance of the studiedsensors suggest that the sensor functionality can be modified by tuning theinteraction between the sensor particle and the STM tip. Based on forcefieldcalculations, theoretical analysis of the single particle sensor shows aninterrelation between the relative movement of the particle on the tip andcontrast structure of the surface images.