The highly sensitive optical measurement of absolute SAW amplitudes for power flow analysis

Franke, K.; Ross-Messemer, M.; Menck, Alexander; Hoeller, R.S.; Schmidt, H.; Weilmacht, M.

doi:10.1109/tuffc.2003.1176527

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…transducer, which is consistent with (Franke et al 2003). The error of measuring the vibration velocity mainly comes from the pixel resolution and uncertainties of 2A is within 1 pixel (representing 0.75 μm) which corresponds to ±6.1 mm/s.…”

Section: A U T H O R Accepted Manuscriptsupporting

confidence: 87%

Acoustic streaming near a sharp structure and its mixing performance characterization

Zhang

Guo

Brunet

et al. 2019

Microfluid Nanofluid

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Section: A U T H O R Accepted Manuscriptsupporting

confidence: 87%

Acoustic streaming near a sharp structure and its mixing performance characterization

Zhang

Guo

Brunet

et al. 2019

Microfluid Nanofluid

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“…The acoustic impedance of the piezoelectric substrate ( Z ) can be calculated as following:

where: ρ s is the density of the piezoelectric substrate. The power flow in SAW devices can be detected by high sensitive optical measurement [ 14 ].…”

Section: The Analysis Of Forces and Other Effects Acting In Ssaw Mmentioning

confidence: 99%

The Separation of Blood Components Using Standing Surface Acoustic Waves (SSAWs) Microfluidic Devices: Analysis and Simulation

2017

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The separation of blood components (WBCs, RBCs, and platelets) is important for medical applications. Recently, standing surface acoustic wave (SSAW) microfluidic devices are used for the separation of particles. In this paper, the design analysis of SSAW microfluidics is presented. Also, the analysis of SSAW force with Rayleigh angle effect and its attenuation in liquid-loaded substrate, viscous drag force, hydrodynamic force, and diffusion force are explained and analyzed. The analyses are provided for selecting the piezoelectric material, width of the main microchannel, working area of SAW, wavelength, minimum input power required for the separation process, and widths of outlet collecting microchannels. The design analysis of SSAW microfluidics is provided for determining the minimum input power required for the separation process with appropriated the displacement contrast of the particles.The analyses are applied for simulation the separation of blood components. The piezoelectric material, width of the main microchannel, working area of SAW, wavelength, and minimum input power required for the separation process are selected as LiNbO3, 120 μm, 1.08 mm2, 300 μm, 371 mW. The results are compared to other published results. The results of these simulations achieve minimum power consumption, less complicated setup, and high collecting efficiency. All simulation programs are built by MATLAB.

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“…Ultimately, the rate of pipetting or the final droplet volume directly depends on the flow rate of the closed loop, significantly but not solely influenced by acoustic streaming. The quadratic relationship between the voltage applied to IDTs and the Reynolds stresses induced in a fluid, driving acoustic streaming, was previously shown 53,60 . However, the system under consideration is a parallel fluidic network of compliant channels housing immiscible fluid media creating pressure discontinuities due to surface tension, therefore, the relationship between input voltage and pipetted volume is believed to be unsuitable for analytical simplifications.…”

Section: Excitation Amplitudementioning

confidence: 84%

“…The quadratic relationship between the voltage applied to IDTs and the Reynolds stresses induced in a fluid, driving acoustic streaming, was previously shown. 53,60 However, the system under consideration is a parallel fluidic network of compliant channels housing immiscible fluid media creating pressure discontinuities due to surface tension, therefore, the relationship between input voltage and pipetted volume is believed to be unsuitable for analytical simplifications. Nonetheless, the operating regime studied here indicates a trend which can easily be approximated for producing values in between.…”

Section: Excitation Amplitudementioning

confidence: 99%

Surface acoustic wave enabled pipette on a chip

et al. 2017

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Mono-disperse droplet formation in microfluidic devices allows the rapid production of thousands of identical droplets and has enabled a wide range of chemical and biological studies through repeat tests performed at pico-to-nanoliter volume samples. However, it is exactly this efficiency of production which has hindered the ability to carefully control the location and quantity of the distribution of various samples on a chip - the key requirement for replicating micro well plate based high throughput screening in vastly reduced volumetric scales. To address this need, here, we present a programmable microfluidic chip capable of pipetting samples from mobile droplets with high accuracy using a non-contact approach. Pipette on a chip (PoaCH) system selectively ejects (pipettes) part of a droplet into a customizable reaction chamber using surface acoustic waves (SAWs). Droplet pipetting is shown to range from as low as 150 pL up to 850 pL with precision down to tens of picoliters. PoaCH offers ease of integration with existing lab on a chip systems as well as a robust and contamination-free droplet manipulation technique in closed microchannels enabling potential implementation in screening and other studies.

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The highly sensitive optical measurement of absolute SAW amplitudes for power flow analysis

Cited by 9 publications

References 9 publications

Acoustic streaming near a sharp structure and its mixing performance characterization

Acoustic streaming near a sharp structure and its mixing performance characterization

The Separation of Blood Components Using Standing Surface Acoustic Waves (SSAWs) Microfluidic Devices: Analysis and Simulation

Surface acoustic wave enabled pipette on a chip

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