Utilization of coupled eigenmodes in Akiyama atomic force microscopy probes for bimodal multifrequency sensing. (5th November 2022)

• Record Type: Journal Article
• Authors: Kort-Kamp, Wilton J M; Murdick, Ryan A; Htoon, Han; Jones, Andrew C
• Is Part Of: Nanotechnology. Volume 33:Number 45(2022)
• Publication Date: 2022-11-05
• Subjects: atomic force microscopy -- Akiyama -- photo-induced force microscopy -- multifrequency force sensing; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac8232
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Akiyama atomic force microscopy probes represent a unique means of combining several of the desirable properties of tuning fork and cantilever probe designs. As a hybridized mechanical resonator, the vibrational characteristics of Akiyama probes result from a complex coupling between the intrinsic vibrational eigenmodes of its constituent tuning fork and bridging cantilever components. Through a combination of finite element analysis modeling and experimental measurements of the thermal vibrations of Akiyama probes we identify a complex series of vibrational eigenmodes and measure their frequencies, quality factors, and spring constants. We then demonstrate the viability of Akiyama probes to perform bimodal multi-frequency force sensing by performing a multimodal measurement of a surface's nanoscale photothermal response using photo-induced force microscopy imaging techniques. Further performing a parametric search over alternative Akiyama probe geometries, we propose two modified probe designs to enhance the capability of Akiyama probes to perform sensitive bimodal multifrequency force sensing measurements.