Quantitative assessment of acoustic pressure in one-dimensional acoustofluidic devices driven by standing surface acoustic waves

2017 ◽  
Vol 111 (4) ◽  
pp. 043508 ◽  
Author(s):  
Shilei Liu ◽  
Guangyao Xu ◽  
Zhengyang Ni ◽  
Xiasheng Guo ◽  
Linjiao Luo ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Quantitative Assessment ◽  
Acoustic Pressure ◽  
Surface Acoustic Waves ◽  
One Dimensional

High-frequency single-electron transport in a quasi-one-dimensional GaAs channel induced by surface acoustic waves

1996 ◽  
Vol 8 (38) ◽  
pp. L531-L539 ◽  
Author(s):  
J M Shilton ◽  
V I Talyanskii ◽  
M Pepper ◽  
D A Ritchie ◽  
J E F Frost ◽  
...  
Keyword(s):  
Electron Transport ◽  
Acoustic Waves ◽  
High Frequency ◽  
Surface Acoustic Waves ◽  
Single Electron ◽  
One Dimensional ◽  
Single Electron Transport

scholarly journals Acoustophoretic Control of Microparticle Transport Using Dual-Wavelength Surface Acoustic Wave Devices

Micromachines ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 52 ◽  
Author(s):  
Jin-Chen Hsu ◽  
Chih-Hsun Hsu ◽  
Yeo-Wei Huang
Keyword(s):  
Particle Motion ◽  
Acoustic Waves ◽  
Acoustic Pressure ◽  
Acoustic Radiation ◽  
Surface Acoustic Waves ◽  
Microfluidic Channel ◽  
Radiation Force ◽  
Dual Wavelength ◽  
Single Frequency ◽  
Motion Trajectories

We present a numerical and experimental study of acoustophoretic manipulation in a microfluidic channel using dual-wavelength standing surface acoustic waves (SSAWs) to transport microparticles into different outlets. The SSAW fields were excited by interdigital transducers (IDTs) composed of two different pitches connected in parallel and series on a lithium niobate substrate such that it yielded spatially superimposed and separated dual-wavelength SSAWs, respectively. SSAWs of a singltablee target wavelength can be efficiently excited by giving an RF voltage of frequency determined by the ratio of the velocity of the SAW to the target IDT pitch (i.e., f = cSAW/p). However, the two-pitch IDTs with similar pitches excite, less efficiently, non-target SSAWs with the wavelength associated with the non-target pitch in addition to target SSAWs by giving the target single-frequency RF voltage. As a result, dual-wavelength SSAWs can be formed. Simulated results revealed variations of acoustic pressure fields induced by the dual-wavelength SSAWs and corresponding influences on the particle motion. The acoustic radiation force in the acoustic pressure field was calculated to pinpoint zero-force positions and simulate particle motion trajectories. Then, dual-wavelength SSAW acoustofluidic devices were fabricated in accordance with the simulation results to experimentally demonstrate switching of SSAW fields as a means of transporting particles. The effects of non-target SSAWs on pre-actuating particles were predicted and observed. The study provides the design considerations needed for the fabrication of acoustofluidic devices with IDT-excited multi-wavelength SSAWs for acoustophoresis of microparticles.

Single-electron transport driven by surface acoustic waves in quasi-one-dimensional channel

2006 ◽  
Vol 359 (2) ◽  
pp. 157-160 ◽  
Author(s):  
Hua-Zhong Guo ◽  
Xiang-Rong Chen ◽  
Jie Gao
Keyword(s):  
Electron Transport ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Single Electron ◽  
One Dimensional ◽  
Single Electron Transport

Quantized current in one-dimensional channel induced by surface acoustic waves

1998 ◽  
Vol 249-251 ◽  
pp. 140-146 ◽  
Author(s):  
V.I. Talyanskii ◽  
J.M. Shilton ◽  
J. Cunningham ◽  
M. Pepper ◽  
C.J.B. Ford ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
One Dimensional

Surface acoustic waves in one-dimensional piezoelectric-metallic phononic crystal: Effect of a cap layer

Ultrasonics ◽  
2018 ◽  
Vol 90 ◽  
pp. 80-97 ◽  
Author(s):  
M. Alami ◽  
E.H. El Boudouti ◽  
B. Djafari-Rouhani ◽  
Y. El Hassouani ◽  
A. Talbi
Keyword(s):  
Acoustic Waves ◽  
Phononic Crystal ◽  
Surface Acoustic Waves ◽  
One Dimensional ◽  
Cap Layer

Sculpting and Aerosolizing Pinned Liquid Films With Localized Acoustic Pressures of Surface Acoustic Waves

2012 ◽  
Author(s):  
Daniel Taller ◽  
Hsueh-Chia Chang ◽  
David B. Go
Keyword(s):  
Contact Angle ◽  
Numerical Modeling ◽  
Contact Line ◽  
Acoustic Waves ◽  
Acoustic Pressure ◽  
Surface Acoustic Waves ◽  
Liquid Films ◽  
Solid Substrate ◽  
Planar Surface ◽  
Bulk Film

Due to viscous decay, a planar surface acoustic wave (SAW) diffracting from a solid substrate into a liquid film produces a time-averaged, exponentially decaying acoustic pressure in the film. We show that if the film is pinned against a bounding wall, the localized acoustic pressure generates a sequence of surface drops at the contact line, whose dimensions decay in the same exponential manner as the localized acoustic pressure. The undulating interfacial profile near the contact line also inherits this exponential decay, such that the averaged contact angle is exponentially small. The bulk film topology and the aerosolization mechanism are hence insensitive to the wettability of the surface but are controlled only by the localized acoustic pressure and the decaying undulations it produces at the contact line. The size distribution of surface drops is collapsed under the exponential scaling that depends only on the SAW decay rate and amplitude. Numerical modeling based on the Young-Laplace equation is used to model the liquid profile and to predict two aerosolization regimes.

Photoluminescence dynamics in GaAs/AlAs quantum wells modulated by one-dimensional standing surface acoustic waves

2009 ◽  
Vol 94 (13) ◽  
pp. 131912 ◽  
Author(s):  
Tetsuomi Sogawa ◽  
Haruki Sanada ◽  
Hideki Gotoh ◽  
Hiroshi Yamaguchi ◽  
Sen Miyashita ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
One Dimensional

Quantised Currents in One Dimensional--Channels Induced by Surface Acoustic Waves

2000 ◽  
Author(s):  
J. Cunningham ◽  
V I Talyanski ◽  
J M Shilton ◽  
M Pepper ◽  
C J B Ford ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
One Dimensional

Effects of Acoustic Waves on Buried Tunnel Structures Under an Impact Load

2017 ◽  
Vol 17 (01) ◽  
pp. 1750003 ◽  
Author(s):  
S. R. Massah ◽  
M. M. Torabipour
Keyword(s):  
Soil Type ◽  
Acoustic Waves ◽  
Acoustic Pressure ◽  
Impact Load ◽  
Underground Structure ◽  
Surface Acoustic Waves ◽  
Ground Surface ◽  
Sound Waves ◽  
Arbitrary Location ◽  
Two Parameters

In this paper, the transmission and reflection of acoustic waves into and from an underground tunnel are investigated by producing an impact load on the ground and measuring the acoustic pressure levels at different time intervals. For this purpose, a sound detector is placed on the ground and then from an arbitrary location on the surface, acoustic waves are transmitted into the ground from an acoustic source. The pressure levels of acoustic waves transmitted into the tunnel space and reflected back to the ground surface are measured, and the effects of several parameters on the attenuation of acoustic pressure levels of transmitted and reflected sound waves are evaluated. Moreover, the effects of parameters such as soil type, concrete type and thickness, buried depth of the underground structure and also the effect of acoustic absorbers on the transmission, propagation and reflection of acoustic waves into and from the tunnel are investigated. The results obtained indicate that the two parameters of soil type and buried depth have the greatest effect on the transmission of acoustic waves, whereas all the parameters considered are important with regard to the reflection of acoustic waves. In addition, it was observed that the use of acoustic absorbers in tunnel structures has a significant effect on the attenuation of transmitted and reflected acoustic waves.

scholarly journals Quantized pumped charge due to surface acoustic waves in a one-dimensional channel

2002 ◽  
Vol 65 (24) ◽  
Author(s):  
Amnon Aharony ◽  
O. Entin-Wohlman
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
One Dimensional
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