Journal ArticleDOI
Ultrasonic Mixing in Microfluidic Channels Using Integrated Transducers
Reads0
Chats0
TLDR
A microfluidic mixer that uses acoustic stirring created by ultrasonic waves to mix phenolphthalein solution and sodium hydroxide dissolved in ethyl alcohol is presented.Abstract:
This paper presents a microfluidic mixer that uses acoustic stirring created by ultrasonic waves. The ultrasound is introduced into the channel by integrated piezoelectric transducers. The transducers are made of a zinc oxide thin film, which is deposited on the bottom surface of a quartz substrate. The poly(dimethylsiloxane) channel is aligned to the transducers on the top surface of the substrate. The transducers are designed for operation around 450 MHz. The main mechanism of the mixing is the acoustic stirring of the fluid perpendicular to the flow direction. The radiation pressure that is generated by the transducer causes the stirring inside the microfluidic channel. The performance of the mixer is characterized by mixing phenolphthalein solution and sodium hydroxide dissolved in ethyl alcohol. Flow rates on the order of 1−100 μL/min are used. The transducers are driven by 1.2 Vrms sinusoidal voltages at 450 MHz.read more
Citations
More filters
Journal ArticleDOI
Micromixers?a review
Nam-Trung Nguyen,Zhigang Wu +1 more
TL;DR: In this paper, the authors report the progress on the recent development of micromixers and present different types and designs of active and passive MCMs, as well as the operation points of the MCMs.
Journal ArticleDOI
Microscale acoustofluidics: Microfluidics driven via acoustics and ultrasonics
James Friend,Leslie Y. Yeo +1 more
TL;DR: In this article, the use of acoustic fields, principally ultrasonics, for application in microfluidics is reviewed, and the abundance of interesting phenomena arising from nonlinear interactions in ultrasound that easily appear at these small scales is considered, especially in surface acoustic wave devices that are simple to fabricate with planar lithography techniques.
Journal ArticleDOI
Microfluidic Mixing: A Review
TL;DR: A high level overview of the field of microfluidic mixing devices is provided before describing some of the more significant proposals for active and passive mixers.
Book ChapterDOI
Micromixing Within Microfluidic Devices
TL;DR: A state-of-art review on microstructured mixing devices and their mixing phenomena is given and the advantages and disadvantages of mixing in a microfluidic environment are discussed.
Journal ArticleDOI
A millisecond micromixer via single-bubble-based acoustic streaming
TL;DR: Due to this technique's simple design, excellent mixing performance, and fast mixing speed (a few milliseconds), this single-bubble-based acoustic micromixer may prove useful for many biochemical studies and applications.
References
More filters
Journal ArticleDOI
Microfluidics-a review
TL;DR: An overview of research activities in the field of fluid components or systems built with microfabrication technologies is given in this paper, focusing on the fluidic behaviour of the various devices, such as valves, pumps and flow sensors as well as the possibilities and pitfalls related to the modelling of these devices using simple flow theory.
Journal ArticleDOI
Chaotic mixing in three-dimensional microvascular networks fabricated by direct-write assembly
TL;DR: It is envisaged that 3D microvascular networks will provide an enabling platform for a wide array of fluidic-based applications.
Journal ArticleDOI
Ultrasonic micromixer for microfluidic systems
TL;DR: In this paper, an active micromixer for continuous flow is described, where the flow path is encapsulated by anodic bonding of a Si wafer to the glass and a diaphragm is etched on the Si side to prevent ultrasonic radiation from escaping to the other parts of the device.
Journal ArticleDOI
Chaotic advection by laminar flow in a twisted pipe
TL;DR: In this article, the appearance of chaotic particle trajectories in steady, laminar, incompressible flow through a twisted pipe of circular cross-section is demonstrated using standard dynamical systems diagnostics and a model flow based on Dean's perturbation solutions.
Journal ArticleDOI
A modular microfluid system with an integrated micromixer
TL;DR: In this paper, a static micromixer built up in silicon wafers is described, where the structured surfaces are bonded together by using a low temperature silicon direct bonding process.