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Related Concept Videos

Centrifugation01:05

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...

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Related Experiment Video

Updated: Jun 8, 2026

Microfluidic Buffer Exchange for Interference-free Micro/Nanoparticle Cell Engineering
10:27

Microfluidic Buffer Exchange for Interference-free Micro/Nanoparticle Cell Engineering

Published on: July 10, 2016

Microfluidic particle sorting utilizing inertial lift force.

Harm A Nieuwstadt1, Robinson Seda, David S Li

  • 1University of Michigan, Ann Arbor, MI, USA.

Biomedical Microdevices
|September 25, 2010
PubMed
Summary
This summary is machine-generated.

This study presents a passive microfluidic device for continuous microparticle separation, crucial for gas embolotherapy. The device efficiently separates particles by size using inertial forces, enabling lab-on-a-chip applications.

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Particle Separation

Background:

  • Perfluorocarbon (PFC) droplets are essential for novel gas embolotherapy.
  • Continuous and efficient microparticle separation is needed for medical applications.

Purpose of the Study:

  • To develop a simple, passive microfluidic device for continuous microparticle separation.
  • To enable the use of specific size micro PFC droplets for gas embolotherapy.

Main Methods:

  • Utilized a rectangular microfluidic channel design.
  • Employed inertial lift forces for lateral particle separation.
  • Focused particle streams at the channel entrance and separated flows at the exit.
  • Validated particle trajectories using Computational Fluid Dynamics (CFD).

Main Results:

  • Successfully separated 10.2-μm microspheres from 3.0-μm microspheres.
  • Achieved a separation efficiency of 69-78%.
  • Demonstrated a throughput of approximately 2 x 10⁴ particles per minute.

Conclusions:

  • The passive microfluidic device offers a simple and effective method for continuous microparticle separation.
  • The design is suitable for lab-on-a-chip (LOC) applications.
  • Theoretical analysis indicates potential for higher separation efficiencies with specific diameter cut-offs.