Examining sensitivity to tip-sample interaction forces in biharmonic and bimodal AFM under acoustic emissions in air and liquids
The Third Emerging Technologies in Mechanical Engineering (ETME2025), Gangwon-Do, South Korea, 10 - 12 December 2025, pp.1, (Summary Text)
- Publication Type: Conference Paper / Summary Text
- City: Gangwon-Do
- Country: South Korea
- Page Numbers: pp.1
- Open Archive Collection: AVESIS Open Access Collection
- Akdeniz University Affiliated: Yes
Abstract
Multi-frequency excitation schemes are applied to resonate the micro-cantilever for enhanced sensitivity to tip-sample interaction forces in AFM. External forces such as acoustic forces act on the micro-cantilevers during AFM operations, thereby affecting their oscillating behaviours. This paper presents theoretical research performed to explore behaviors of the micro-cantilever under van der Waals forces in air and methanol / ethylacetate mixtures in the presence of dynamic acoustic forces. For particular operating conditions, the responses of the proposed dynamic model demonstrate good agreement with the AFM measurements given in the literature. Moreover, application of biharmonic excitations yields notable enhancements in sensitivity of amplitude, phase shift, and frequency shift at the particular separation distances below 10 nm in air, when compared with the bimodal operations. Therefore, the effects of acoustic emissions on the micro-cantilever dynamics are to be considered for precise quantification of tip-sample interaction forces during multi-frequency AFM operations, especially in air.