scholarly journals On-Chip Micro Mixer Driven by Elastic Wall with Virtual Actuator

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 217
Author(s):  
Toshio Takayama ◽  
Makoto Kaneko ◽  
Chia-Hung Dylan Tsai
Keyword(s):  
Swirling Flow ◽  
Single Layer ◽  
Simple Mechanism ◽  
Elastic Wall ◽  
On Chip ◽  
Micro Mixer ◽  
As If

In this paper, we propose an on-chip micromixer driven by an elastic wall with a virtual actuator. The on-chip micro mixer is composed of a circular chamber surrounded by a ring-shaped channel under isolation with an elastic wall. When vibrational pressure is put on the driving channel by an actuator, the volume of the circular chamber changes through the deformation of the elastic wall, as if there exists a virtual actuator near the wall. As a result, the liquid in the circular chamber is pushed out and pulled through the neck channel. This action creates a swirling flow in the circular chamber while maintaining isolation from the driving channel. Through experiments, we confirmed the swirling flow under an isolated environment using an air-based valve. The advantage of this approach is that the micromixer can be designed with a single layer having a simple mechanism.

scholarly journals On-chip label-free protein analysis with downstream electrodes for direct removal of electrolysis products

Lab on a Chip ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 162-170 ◽  
Author(s):  
Kadi L. Saar ◽  
Yingbo Zhang ◽  
Thomas Müller ◽  
Challa P. Kumar ◽  
Sean Devenish ◽  
...  
Keyword(s):  
Electric Fields ◽  
Single Layer ◽  
Microfluidic Devices ◽  
Protein Analysis ◽  
Label Free ◽  
Free Protein ◽  
On Chip ◽  
Electrolysis Products

Single-layer lithography microfluidic devices for applying high and stable electric fields on chip.

scholarly journals On-Chip Single-Layer Integration of Diamond Spins with Microwave and Plasmonic Channels

ACS Photonics ◽  
2020 ◽  
Vol 7 (8) ◽  
pp. 2018-2026
Author(s):  
Mikhail Y. Shalaginov ◽  
Simeon I. Bogdanov ◽  
Alexei S. Lagutchev ◽  
Alexander V. Kildishev ◽  
Alexandra Boltasseva ◽  
...  
Keyword(s):  
Single Layer ◽  
On Chip

scholarly journals On-chip pressure sensor using single-layer concentric chambers

2016 ◽  
Vol 10 (2) ◽  
pp. 024116 ◽  
Author(s):  
Chia-Hung Dylan Tsai ◽  
Makoto Kaneko
Keyword(s):  
Pressure Sensor ◽  
Single Layer ◽  
On Chip

Single-layer planar on-chip flow cytometer using microfluidic drifting based three-dimensional (3D) hydrodynamic focusing

Lab on a Chip ◽  
2009 ◽  
Vol 9 (11) ◽  
pp. 1583 ◽  
Author(s):  
Xiaole Mao ◽  
Sz-Chin Steven Lin ◽  
Cheng Dong ◽  
Tony Jun Huang
Keyword(s):  
Three Dimensional ◽  
Single Layer ◽  
Flow Cytometer ◽  
Hydrodynamic Focusing ◽  
Chip Flow ◽  
On Chip

Numerical Modeling and Parametric Optimization of Micromixer for Low Diffusivity Fluids

2017 ◽  
Vol 16 (3) ◽  
Author(s):  
K. Karthikeyan ◽  
L. Sujatha ◽  
N. M Sudharsan
Keyword(s):  
Pressure Loss ◽  
Parametric Optimization ◽  
Channel Length ◽  
Mixing Length ◽  
Cross Sectional ◽  
Lab On Chip ◽  
Viscous Forces ◽  
Optimum Configuration ◽  
On Chip ◽  
Micro Mixer

AbstractThis paper deals with the design, analysis and optimization of micro-mixer for fluids having very low diffusivity (in the order of 10−12m2/s) to be used in Lab on Chip (LOC) for medical diagnosis. As flow is laminar and the cross-sectional area is in microscale, the viscous forces are strong causing the fluids to be transported in streamline with minimum diffusion. The main objective in designing a micro mixer is to achieve complete mixing with minimum channel length and pressure drop. In this work a passive micro mixer with two inlets and one outlet (Y shaped passive micro mixer) with obstacles in various shapes and sizes is modelled, to study the effect of mixing. After a CFD analysis, Analysis of variance (ANOVA) of 3Kdesign with 3 parameters as well as a 2Kdesign with 4 parameters was performed to study the effect of parameters on mixing index (mixing length) and pressure loss. There is a negative correlation between the response obtained for mixing length and pressure loss while varying the parameters. This makes it difficult to predict the optimum configuration. Taguchi method is used to obtain an optimum configuration to overcome this negative correlatiozn.

Serially Arranged Wall Driving On-Chip Micro Mixer

2019 ◽  
Vol 2019 (0) ◽  
pp. 2P1-G03
Author(s):  
Yuuta TSUTSUMI ◽  
Toshio TAKAYAMA ◽  
Mitsuhiro HORADE ◽  
Makoto KANEKO
Keyword(s):  
On Chip ◽  
Micro Mixer

scholarly journals Push/Pull Inequality Based High-Speed On-Chip Mixer Enhanced by Wettability

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 950
Author(s):  
Toshio Takayama ◽  
Naoya Hosokawa ◽  
Chia-Hung Dylan Tsai ◽  
Makoto Kaneko
Keyword(s):  
High Speed ◽  
Channel Wall ◽  
Swirling Flow ◽  
Fluid Motion ◽  
Microfluidic Channel ◽  
Main Channel ◽  
Rotational Flow ◽  
Viscous Loss ◽  
Flow Speeds ◽  
On Chip

In this paper, a high-speed on-chip mixer using two effects is proposed, i.e., push/pull inequality and wettability. Push/pull inequality and wettability are effective for generating a rotational fluid motion in the chamber and for enhancing the rotational speed by reducing the viscous loss between the liquid and channel wall, respectively. An on-chip mixer is composed of three components, a microfluidic channel for making the main fluid flow, a circular chamber connected to the channel for generating a rotational flow, and an actuator connected at the end of the channel allowing a push/pull motion to be applied to the liquid in the main channel. The flow patterns in the chamber under push/pull motions are nonreversible for each motion and, as a result, produce one-directional torque to the fluid in the circular chamber. This nonreversible motion is called push/pull inequality and eventually creates a swirling flow in the chamber. Using hydrophilic treatments, we executed the experiment with a straight channel and a circular chamber to clarify the mixing characteristics at different flow speeds. According to the results, it is confirmed that the swirling velocity under appropriately tuned wettability is 100 times faster than that without tuning.

A novel hybrid series stacked differential fractal inductor for MMIC applications

Circuit World ◽  
2019 ◽  
Vol 46 (2) ◽  
pp. 137-145
Author(s):  
Sunil Kumar Tumma ◽  
Bheema Rao Nistala
Keyword(s):  
Resonance Frequency ◽  
Quality Factor ◽  
Single Layer ◽  
Low Noise ◽  
Process Technology ◽  
Content Type ◽  
Chip Area ◽  
In Series ◽  
Noise Amplifier ◽  
On Chip

Purpose The purpose of this paper is to design an on-chip inductor with high inductance, high-quality factor and high self-resonance frequency for the equivalent on-chip area using fractal curves. Design/methodology/approach A novel hybrid series stacked differential fractal inductor using Hilbert and Sierpinski fractal curves is proposed with two different layers connected in series using vias. The inductor is implemented in Sonnet EM simulator using 180 nm CMOS standard process technology. Findings The proposed inductor reduces the parasitic capacitance and negative mutual inductance between the adjacent layers with significant improvement in overall inductance, quality factor and self-resonance frequency when compared with conventional series stacked fractal inductors. Research limitations/implications The fractal inductor is used to create high inductance in the single-layer process, but access to multilayers is restricted owing to unusual and expensive fabrication processes. Practical implications The proposed inductor can be used in implementation of low noise amplifier, voltage controlled oscillators and power amplifiers. Originality/value This paper introduces a combination of two fractal curves to implement a hybrid fractal inductor that enhances the performance of the inductor.

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