Electro-osmotic Flow
Electro-osmotic Flow - Related Videos
10:43
Flow Cytometry Purification of Mouse Meiotic Cells
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An efficient method to obtain highly purified viable meiotic fractions from mouse testis is described, which combines a refined cell dissociation protocol with fluorescent activated cell sorting (FACS). This method takes advantage of differences in the DNA content and nuclear density of discrete meiotic fractions.
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The micronucleus (MN) assay is a well-established test for quantifying DNA damage. However, scoring the assay using conventional techniques such as manual microscopy or feature-based image analysis is laborious and challenging. This paper describes the methodology to develop an artificial intelligence model to score the MN assay using imaging flow cytometry data.
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Platelet Adhesion and Aggregation Under Flow using Microfluidic Flow Cells
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The platelet adhesion cascade takes place in the presence of shear flow, a factor not accounted for in conventional (static) well-plate assays. This article reports on a platelet-aggregation assay utilizing a microfluidic well-plate format to emulate physiological shear flow conditions.
03:38
Developing a Cerebral Blood Flow Atlas for Blood Flow Mapping
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2025
Source: Tan, Z., et al., Construction and Application of Cerebral Functional Region-Based Cerebral Blood Flow Atlas Using Magnetic Resonance Imaging-Arterial Spin Labeling. J. Vis. Exp. (2024).This video demonstrates the method to construct a cerebral blood flow atlas by integrating magnetic resonance imaging or MRI-arterial spin labeling data with segmented brain regions, visualizing blood flow patterns, and quantifying flow levels across functional areas.
10:05
Measuring Turbulent Flows
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI Turbulent flows exhibit very high frequency fluctuations that require instruments with high time-resolution for their appropriate characterization. Hot-wire anemometers have a short enough time-response to fulfill this requirement. The purpose of this experiment is to demonstrate the use of hot-wire anemometry to characterize a turbulent jet. In this...
FAQs
Counterions concentrate near the charged solid-liquid interface, forming an electrical double layer. When an electric field is applied, these mobile ions move through the narrow channel or porous structure. Their viscous interaction with neighboring solvent transfers momentum to the liquid, linking interfacial charge behavior to the overall transport of the solution.
Surface chemistry determines how the solid interacts with the liquid and therefore influences the interfacial charge and counterion distribution. Changing that surface condition can alter the strength of ion-driven solvent movement. This makes surface modification or selection an important way to regulate transport in chemical channels, porous materials, and microfluidic systems.
The applied voltage, electrolyte composition, and surface chemistry are the principal control variables identified for this process. Voltage supplies the electric-field driving force, while the electrolyte affects the ions present near the interface. Adjusting these factors changes transport behavior and can help improve control and analytical performance in separation systems.
Electro-osmotic flow can move liquid without mechanical parts, because the applied electric field acts through ions at the solid-liquid interface. It can also produce a nearly uniform velocity profile across the channel. These features provide a distinct transport approach for compact chemical and microfluidic systems where mechanical movement is undesirable.
A typical setup uses a narrow channel or porous material that contacts the liquid, establishes the relevant interfacial charge, and applies an electric field across the system. Researchers then adjust the surface chemistry, electrolyte composition, and voltage to regulate transport. This sequence supports controlled liquid movement for subsequent microfluidic or separation experiments.
In capillary electrophoresis, electro-osmotic flow contributes to liquid transport through the capillary while an electric field is applied. Its nearly uniform velocity profile and lack of mechanical pumping can support analytical separations. Controlling the interface, electrolyte, and voltage helps regulate movement and improve the resulting analytical performance.
Microfluidic devices benefit from liquid transport that does not require moving mechanical parts. Electro-osmotic flow provides a way to drive solution movement through narrow channels while allowing researchers to regulate transport through surface chemistry, electrolyte composition, and voltage. These controls make the process relevant to compact chemical systems and integrated fluid-handling designs.
Electro-osmotic flow supports the movement of liquid through confined structures used for electrochemical separations. Because transport responds to interfacial charge, electrolyte composition, and applied voltage, researchers can tune conditions for the separation system. The process therefore connects surface chemistry and electric-field control with practical improvements in analytical transport.