Particle manipulation by adhere method as travelling surface acoustic wave
Surface acoustic wave (SAW) is waves that propagate on the surface of the substrate. The propagating wave generated by applying the alternating voltage across electrodes on piezoelectric substates. By the propagating waves, it can be used for the separation of particles. There are two important p...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/113980/1/113980.pdf |
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| Summary: | Surface acoustic wave (SAW) is waves that propagate on the surface of the
substrate. The propagating wave generated by applying the alternating voltage
across electrodes on piezoelectric substates. By the propagating waves, it can
be used for the separation of particles. There are two important parameters of
SAW to be used in particle manipulation which are the piezoelectric substrate
(PZT) and interdigitated electrode (IDE). For this project, the channel for
particle manipulation will be part of the device. For SAW have two types which
is Travelling surface acoustic wave (TSAW) and Standing surface acoustic
wave (SSAW). TSAW device involves one IDE. In this project, the working
principle of the TSAW device has been demonstrated in microfluidic systems
with the alternative method. The previous method of fabrication has some
disadvantages which is affect the fabrication time besides cannot vary finger
dimension because of the electrode have been built in the piezoelectric
substrate. In this project, adhere method has been used to replace the
conventional method that involves IDE and piezoelectric substrates by using
PZT substrate. In this work SAW generated on the piezoelectric substrate using
interdigitated electrode fabricated using ITO coated glass in contact with each
other to stimulate the wave propagation. The generation of TSAW have been
observed concerning the size of interdigitated ITO glass electrode IDE needed
to find the optimum time for the SAW force reached as for the best point of
velocity and the best output voltage with low loss, which can generate stable
TSAW. In this project, shows that 20s is the maximum point for SAW applying
force to manipulate the particles. Besides that, the best distance for the best
output voltage with low loss is 3 cm which is suitable for this adhere method. |
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