Coaxial Flow Focusing
Coaxial Flow Focusing - Related Videos
08:58
Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device
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Cited by 8 •
2015
Microfluidic double emulsions generation typically involves devices with patterned wettability or custom-fabricated glass components. Here we describe the fabrication and testing of an all polydimethylsiloxane (PDMS) double emulsion generator that does not require surface treatment or complicated fabrication processes, and is capable of producing double emulsions down to 14 µm.
01:31
Energy Stored In A Coaxial Cable
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2023
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly. In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
12:47
Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
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Cited by 1 •
2014
Procedures are outlined to prepare segmented and coaxial nanowires via templated electrodeposition in nanopores. As examples, segmented nanowires consisting of Ag and ZnO segments, and coaxial nanowires consisting of a TiO2 shell and a Ag core were made. The nanowires were used in photocatalytic hydrogen formation experiments.
02:13
Inducing a Spinal Cord Contusion in a Mouse Model Using a Spinal Cord Injury Coaxial Platform
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2025
Source: Elzat, E. Y. Y., et al., Establishing a Mouse Contusion Spinal Cord Injury Model Based on a Minimally Invasive Technique. J. Vis. Exp. (2022).This video demonstrates the method for inducing a contusion injury at the T9 level spinal cord in a mouse model, using a spinal cord injury coaxial platform. A weight is dropped on the T9 level spinal cord that creates a contusion that immediately causes tissue discoloration and swelling.
07:38
Real-time Monitoring of High Intensity Focused Ultrasound (HIFU) Ablation of In Vitro Canine Livers Using Harmonic Motion Imaging for Focused Ultrasound (HMIFU)
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Cited by 13 •
2015
This article describes real-time monitoring of HIFU ablation in canine liver with high frame rate ultrasound imaging using diverging and plane wave imaging. Harmonic Motion Imaging for Focused Ultrasound is used to image the decrease of acoustic radiation force induced displacement in the ablated region.
FAQs
Flow rates and pressures determine how strongly the surrounding sheath fluids compress the central stream. Fluid properties also influence the resulting focused geometry and transport behavior. By adjusting these variables, researchers can control the stream’s size and confinement, which helps produce more consistent droplets, particles, fibers, or microcapsules for downstream bioengineering applications.
Concentric sheath fluids apply hydrodynamic focusing around the inner flow, maintaining a controlled central pathway within the narrow channel. This arrangement provides fine spatial control over the material being transported without relying only on the dimensions of the central channel. The resulting confinement supports reproducible fabrication of engineered biological materials and model systems.
Droplet formation can occur when the focused central stream is shaped and transported under conditions created by the surrounding flows. Changing flow rates, pressures, and fluid properties modifies the focused stream and can promote the breakup or organization needed to generate droplets. This control is valuable when uniform droplet populations are required for bioengineering experiments.
Reproducibility comes from controlling the central stream through coordinated fluid delivery and hydrodynamic confinement. Because flow rates, pressures, and fluid properties can be adjusted systematically, the process provides fine control over the size and transport of the focused material. That consistency supports uniform fabrication and can contribute to scalable production of particles, fibers, and microcapsules.
A typical workflow introduces an inner fluid into a narrow channel while one or more sheath fluids surround it. The surrounding streams compress the inner flow, after which researchers adjust flow rates, pressures, and fluid properties to obtain the desired focused geometry or promote droplet formation. The collected output can then serve as droplets, particles, fibers, or microcapsules.
The technique supports cell encapsulation, drug delivery, tissue engineering, and biochemical assays by producing controlled droplets, particles, fibers, and microcapsules. These structures can serve as engineered carriers, fabricated materials, or model systems. Its precise spatial control and reproducibility are especially relevant when biological components or biochemical environments must be organized consistently.