Investigating the Effect of Tip Structure and Elasticity on Atomic-Resolution Scanning Probe Microscopy
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 are investigated. Simulations conducted via analytic potentials and simple tip apex models are currently being 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. Ultimately, an SPM simulator implementing realistic tip apex models and interaction potentials will be realized.
- 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