ArticleBeilstein journal of nanotechnology2015
Optimization of phase contrast in bimodal amplitude modulation AFM.
Article in Beilstein journal of nanotechnology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Multifrequency AFM integrating PeakForce tapping and higher eigenmodes for heterogeneous surface characterization.Beilstein journal of nanotechnology · 2025Article
- Bulk chemical composition contrast from attractive forces in AFM force spectroscopy.Beilstein journal of nanotechnology · 2021Article
- Opportunities and Challenges for Biosensors and Nanoscale Analytical Tools for Pandemics: COVID-19.ACS nano · 2020Review
- Identification of HIV-1-Based Virus-like Particles by Multifrequency Atomic Force Microscopy.Biophysical journal · 2016Article
- Advanced atomic force microscopy techniques III.Beilstein journal of nanotechnology · 2016Article
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3 authors.
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Abstract
Bimodal force microscopy has expanded the capabilities of atomic force microscopy (AFM) by providing high spatial resolution images, compositional contrast and quantitative mapping of material properties without compromising the data acquisition speed. In the first bimodal AFM configuration, an amplitude feedback loop keeps constant the amplitude of the first mode while the observables of the second mode have not feedback restrictions (bimodal AM). Here we study the conditions to enhance the compositional contrast in bimodal AM while imaging heterogeneous materials. The contrast has a maximum by decreasing the amplitude of the second mode. We demonstrate that the roles of the excited modes are asymmetric. The operational range of bimodal AM is maximized when the second mode is free to follow changes in the force. We also study the contrast in trimodal AFM by analyzing the kinetic energy ratios. The phase contrast improves by decreasing the energy of second mode relative to those of the first and third modes.
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