Imaging the SAW Field on Suspended 2D Membrane

Master thesis (2023)

Authors

Y. SUN Mechanical Engineering

Contributors

S. Caneva Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering (mentor)
G.J. Verbiest Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering (mentor)
H.N. Açıkgöz Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering (coach)
Jieun Yang Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering (coach)
Faculty
Mechanical Engineering, Mechanical Engineering
Copyright: © 2023 YUE SUN
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Published Date

29-08-2023

Language

English

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Faculty

Mechanical Engineering

Abstract

Surface acoustic wave (SAW) is widely used in biological research and sensor applications, acomprehensive understanding of SAW propagation and visualization on suspended 2D membranes is crucial for the manipulation of nanoparticles in biological research and sensitivity improvement of SAW sensors based on 2D material. The initial step of this project involved exciting a standing SAW field on the SAW device and attempting to use Digital Holography Microscopy (DHM) for imaging the standing SAW field on the substrate. This attempt was very challenging and unfortunately was not successful. We used an Atomic Force Microscope (AFM) as an alternative solution for SAW field imaging. Initially, AFM was used to image the SAW field on the SAW device substrate, and the impacts of input frequency and power on the amplitude of the SAW field were investigated. Subsequently, microcavities were fabricated on the SAW device to record images of the SAW field within the microcavities and their surrounding areas, aiming to investigate the impact of microcavities on the SAW field. Finally, the prepared graphene membrane was transferred to the microcavities, the SAW propagation was recorded on the suspended membrane and the influence of the suspended membrane on SAW propagation was analyzed.

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