Analysis of amplitude modulation atomic force microscopy in aqueous salt solutions
Applied Surface Science
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/27867
We present a numerical analysis of amplitude modulation atomic force microscopy in aqueous salt solutions, by considering the interaction of the microscope tip with a model sample surface consisting of a hard substrate and soft biological material through Hertz and electrostatic double layer forces. Despite the significant improvements reported in the literature concerning contact-mode atomic force microscopy measurements of biological material due to electrostatic interactions in aqueous solutions, our results reveal that only modest gains of ∼15% in imaging contrast at high amplitude setpoints are expected under typical experimental conditions for amplitude modulation atomic force microscopy, together with relatively unaffected sample indentation and maximum tip-sample interaction values. © 2014 Elsevier B.V. All rights reserved.
- Conference Paper