Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Effects of liquid conductivity differences on multi-component sample injection, pumping and stacking in microfluidic

David Sinton1, Liqing Ren, Xiangchun Xuan

  • 1Department of Mechanical & Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, CanadaM5S 3G8.

Lab on a Chip
|April 22, 2004
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Protective Effects of Dexmedetomidine Against Ischemic Heart Disease and Diabetic Cardiomyopathy by Targeting Ferroptosis.

Reviews in cardiovascular medicine·2026
Same author

Autonomous High-Throughput Characterization of Liquid-Liquid Phase Behavior.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

The application of continuous enteral nutrition during sequential chemoradiotherapy and immunotherapy in patients with esophageal cancer: a retrospective study.

Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer·2026
Same author

Lactate-driven H3K18 lactylation promotes cisplatin resistance in bladder cancer via HNRNPF-Parkin mediated mitophagy.

Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy·2026
Same author

MFGE8-primed fibroblasts reprogram the immunosuppressed microenvironment to promote diabetic wound healing.

Frontiers in cell and developmental biology·2026
Same author

Ana1/CEP295 regulates centriolar doublet-to-triplet conversion during spermatogenesis.

The Journal of cell biology·2026

This study shows that using conductivity differences with a dynamic loading method on microfluidic chips improves sample manipulation. This technique enhances both sample transport and separation efficiency for lab-on-a-chip applications.

Area of Science:

  • Microfluidics
  • Analytical Chemistry
  • Biotechnology

Background:

  • Lab-on-a-chip devices require precise sample manipulation for transport and separation.
  • Conductivity differences between samples and buffers are crucial for controlling analyte behavior on-chip.

Purpose of the Study:

  • To investigate the impact of conductivity differences on sample manipulation in microfluidic devices.
  • To evaluate a dynamic loading method for sample injection in both sample pumping and stacking scenarios.

Main Methods:

  • Utilized a straight-cross channel configuration with a dynamic loading technique for sample injection.
  • Explored sample pumping (high conductivity sample) and sample stacking (low conductivity sample) using conductivity gradients.
  • Analyzed the effects of varying sample length and conductivity on transport and separation efficiency.

Related Experiment Videos

Main Results:

  • Employing conductivity differences alone improved sample transport and separation compared to uniform conductivity.
  • Dynamic loading significantly enhanced sample pumping, increasing peak height eight-fold and reducing sample length.
  • Dynamic loading in sample stacking boosted peak intensity threefold, enabling rapid separations.

Conclusions:

  • The dynamic loading technique, combined with strategic conductivity differences, substantially expands the capabilities of microfluidic chips.
  • This approach offers enhanced flexibility and accuracy for sample manipulation in lab-on-a-chip systems.