Manipulation of micro particles and nodes formation through standing surface acoustic waves
The ability to manipulate micro particles creates a lot of potential applications such as in biology, 3D printing as well as in micro fluidics. There are various types of techniques that can manipulate micro particles. One of the technique is the utilization of surface acoustic waves to handle...
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| 格式: | Final Year Project |
| 語言: | English |
| 出版: |
Nanyang Technological University
2020
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/141984 |
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| 機構: | Nanyang Technological University |
| 語言: | English |
| 總結: | The ability to manipulate micro particles creates a lot of potential applications such as
in biology, 3D printing as well as in micro fluidics. There are various types of
techniques that can manipulate micro particles. One of the technique is the utilization
of surface acoustic waves to handle micro particles and as it is still a relatively new
technique to manipulate micro particles as compared to other techniques, researches
are still being conducted to fully understand the manipulation of micro particles by
utilizing surface acoustic waves.
During the project, a commercial software will be used to conduct simulations. The
software used is COMSOL Multiphysics and it will be utilized to visualize the
distribution of acoustic pressure across a micro chamber subjected to standing surface
acoustic waves. Following that, an experiment will be conducted to observe the
formations of pressure nodes along with the pressure anti-nodes including how does
adjusting the phase difference of surface acoustic waves affects where the pressure
nodes and anti-nodes are located so as to manipulate the micro particles. The results
obtained from the experiment will then be compared to the results of the simulation so
that the results from the simulation can validate the results from the experiment.
Results obtained from the experiment and simulation showed that having a presence
of standing surface acoustic waves will produce pressure nodes along with pressure
anti-nodes and after measurement, it has been found that the measurement from the
pressure node to its neighbouring pressure anti-node is half of the input wavelength.
Furthermore, it has also been validated that adjustments made to the difference in
phase of the surface acoustic wave leads to changes of the placement of the pressure
nodes as well as pressure anti-nodes and this enables the manipulation of micro
particles. |
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