Blood cell capture in a sawtooth dielectrophoretic microchannel

Paul V. Jones, Sarah J R Staton, Mark Hayes

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Biological fluids can be considered to contain information-rich mixtures of biochemicals and particles that enable clinicians to accurately diagnose a wide range of pathologies. Rapid and inexpensive analysis of blood and other bodily fluids is a topic gaining substantial attention in both science and medicine. One line of development involves microfluidic approaches that provide unique advantages over entrenched technologies, including rapid analysis times, microliter sample and reagent volumes, potentially low cost, and practical portability. The present study focuses on the isolation and concentration of human blood cells from small-volume samples of diluted whole blood. Separation of cells from the matrix of whole blood was accomplished using constant potential insulator-based gradient dielectrophoresis in a converging, sawtooth-patterned microchannel. The channel design enabled the isolation and concentration of specific cell types by exploiting variations in their characteristic physical properties. The technique can operate with isotonic buffers, allowing capture of whole cells, and reproducible capture occurred at specific locales within the channel over a global applied voltage range of 200-700 V.

Original languageEnglish (US)
Pages (from-to)2103-2111
Number of pages9
JournalAnalytical and bioanalytical chemistry
Volume401
Issue number7
DOIs
StatePublished - Oct 1 2011

    Fingerprint

Keywords

  • Bioparticle trapping
  • Blood
  • Dielectrophoresis
  • Erythrocytes
  • Separation

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry

Cite this