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Neue Einsichten in die Sonden-Proben-Wechselwirkung bei den Rastersondenmethoden

English title New Insight into Tip-Sample Interaction by Scanning Probe Methods
Applicant Meyer Ernst
Number 113496
Funding scheme Project funding (Div. I-III)
Research institution Departement Physik Universität Basel
Institution of higher education University of Basel - BS
Main discipline Condensed Matter Physics
Start/End 01.10.2006 - 30.09.2007
Approved amount 426'094.00
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Keywords (11)

SPM; STM; SFM; Atomic and molecular resolution; true atomic resolution by AFM in ultrahigh vacuum; insulators; Scanning probe microscopy; atomic force microscopy; magnetic force microscopy; scanning tunneling microscopy; nanomechanics

Lay Summary (English)

Lead
Lay summary
The investigation of contact formation will be investigated with novel insulating hetero-epitaxial structures, such KBr on NaCl and NaCl on KBr.
From previous Monte Carlo calculations and helium scattering experiments it is expected that super-lattices can be created. These systems are of interest from a surface science point of view, but are also promising to study the nanometer-scale contact formation and atomic friction processes, which are intimately related to commensurability. The second part is focused on the deposition of molecules on insulators and the image formation by non-contact force microscopy. From previous studies it is evident that most insulating surfaces have only weak interactions with organic molecules, which makes the immobilization of these molecules a difficult task. Ways to overcome this problem are to modify the substrate by electron irradiation, which leads to pit formation. These nanometer-sized pits are traps for certain molecules. Molecules with different end groups will be deposited on these pits. The image formation by nc-AFM will be investigated on these samples.

We will strongly concentrate our efforts on the further investigation of uncompensated spins in exchange biased antiferromagnetic/ferromagnetic systems. In addition, experiments concerning the return and complimentary point memory will be done. In order to further develop magnetic force microscopy, experiments with MFM tips with two antiferromagnetically coupled ferromagnetic layers will be performed.

The research of UHV-STM will be focussed on the DPDI network, which has exceptional stability up to 400ºC. XSW studies will be performed to yield complementary information about this unexplained bonding mechanism. The network will be used as a template for molecules, such as C60 or small &# 61552;-conjugated molecules, where novel growth mechanisms with increased “step” density are expected. The co-evaporation of DPDI, a H-donor, and PTCDA, a H-acceptor, will be explored to find novel molecular networks.
Direct link to Lay Summary Last update: 21.02.2013

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Associated projects

Number Title Start Funding scheme
117610 Neue Einsichten in die Sonden-Proben-Wechselwirkung bei den Rastersondenmethoden 01.10.2007 Project funding (Div. I-III)
117970 Magnetism of Thin Films and Heterostructures 01.10.2007 Project funding (Div. I-III)
109204 Neue Einsichten in die Sonden-Proben-Wechselwirkung bei den Rastersondenmethoden 01.10.2005 Project funding (Div. I-III)

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