Investigating the Effect of Tip Structure and Elasticity on Atomic-Resolution Scanning Probe Microscopy
Funding:TÜBİTAK 2209/A Research Grant
Project Duration:Start Date: October 1st, 2012
Completion Date: July 31st, 2017
Summary:Atomic-resolution scanning probe microscopy experiments suffer from various problems including thermal drift, piezo nonlinearities, variability in tip apex chemistry, structural asymmetry of the tip apex, as well as tip elasticity. In this project, the effects of tip elasticity and asymmetry on atomic-resolution scanning probe microscopy experiments conducted on various model sample surfaces have been investigated. Simulations conducted via analytical potentials and simple tip apex models have been later augmented with molecular dynamics (MD) approaches. It is projected that a better understanding of the role of the tip in scanning probe microscopy will allow more meaningful comparisons between experimental results obtained by different research groups.
- Uluutku, B., Baykara, M.Z. (2015). "Artifacts Related to Tip Asymmetry in High-Resolution Atomic Force Microscopy and Scanning Tunneling Microscopy Measurements of Graphitic Surfaces", Journal of Vacuum Science & Technology B, v.33 p.031802
- Uluutku, B., Baykara, M.Z. (2013). "Effect of Lateral Tip Stiffness on Atomic-Resolution Force Field Spectroscopy", Journal of Vacuum Science & Technology B, v.31 p.041801
- Berkin Uluutku (Advisor: Mehmet Z. Baykara), (2017). "Modeling of NC-AFM Experiments by the Utilization of Molecular Dynamics and the Harmonic Oscillator Model", Bilkent University, Department of Mechanical Engineering, Ankara, Turkey