Distance versus Capillary Flow Dynamics-Based Detection Methods on a Microfluidic Paper-Based Analytical Device (μPAD)

Soo Chung, Christian M. Jennings, Jeong-Yeol Yoon

Research output: Contribution to journalReview article

Abstract

In recent years, there has been high interest in paper-based microfluidic sensors or microfluidic paper-based analytical devices (μPADs) towards low-cost, portable, and easy-to-use sensing for chemical and biological targets. μPAD allows spontaneous liquid flow without any external or internal pumping, as well as an innate filtration capability. Although both optical (colorimetric and fluorescent) and electrochemical detection have been demonstrated on μPADs, several limitations still remain, such as the need for additional equipment, vulnerability to ambient lighting perturbation, and inferior sensitivity. Herein, alternative detection methods on μPADs are reviewed to resolve these issues, including relatively well studied distance-based measurements and the newer capillary flow dynamics-based method. Detection principles, assay performance, strengths, and weaknesses are explained for these methods, along with their potential future applications towards point-of-care medical diagnostics and other field-based applications.

Original languageEnglish (US)
JournalChemistry - A European Journal
DOIs
StateAccepted/In press - Jan 1 2019

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Capillary flow
Microfluidics
Bioelectric potentials
Health care
Assays
Lighting
Sensors
Liquids
Costs

Keywords

  • analytical methods
  • capillary flow dynamics
  • machine learning
  • microfluidics
  • point-of-care diagnostics

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Organic Chemistry

Cite this

Distance versus Capillary Flow Dynamics-Based Detection Methods on a Microfluidic Paper-Based Analytical Device (μPAD). / Chung, Soo; Jennings, Christian M.; Yoon, Jeong-Yeol.

In: Chemistry - A European Journal, 01.01.2019.

Research output: Contribution to journalReview article

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