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Micromachines 2018, 9(9), 453; https://doi.org/10.3390/mi9090453

Characterization and Integration of Terahertz Technology within Microfluidic Platforms

1
School of Engineering, University of British Columbia (UBC), Kelowna, BC V1V 1V7, Canada
2
Materials Science Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia
*
Author to whom correspondence should be addressed.
Received: 30 July 2018 / Revised: 5 September 2018 / Accepted: 10 September 2018 / Published: 11 September 2018
(This article belongs to the Special Issue Advanced MEMS/NEMS Technology)
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Abstract

In this work, the prospects of integrating terahertz (THz) time-domain spectroscopy (TDS) within polymer-based microfluidic platforms are investigated. The work considers platforms based upon the polar polymers polyethylene terephthalate (PET), polycarbonate (PC), polymethyl-methacrylate (PMMA), polydimethylsiloxane (PDMS), and the nonpolar polymers fluorinated ethylene propylene (FEP), polystyrene (PS), high-density polyethylene (HDPE), and ultra-high-molecular-weight polyethylene (UHMWPE). The THz absorption coefficients for these polymers are measured. Two microfluidic platforms are then designed, fabricated, and tested, with one being based upon PET, as a representative high-loss polar polymer, and one being based upon UHMWPE, as a representative low-loss nonpolar polymer. It is shown that the UHMWPE microfluidic platform yields reliable measurements of THz absorption coefficients up to a frequency of 1.75 THz, in contrast to the PET microfluidic platform, which functions only up to 1.38 THz. The distinction seen here is attributed to the differing levels of THz absorption and the manifestation of differing f for the systems. Such findings can play an important role in the future integration of THz technology and polymer-based microfluidic systems. View Full-Text
Keywords: THz time-domain spectroscopy; lab-on-a-chip; microfluidics; polymer absorption THz time-domain spectroscopy; lab-on-a-chip; microfluidics; polymer absorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Alfihed, S.; Bergen, M.H.; Ciocoiu, A.; Holzman, J.F.; Foulds, I.G. Characterization and Integration of Terahertz Technology within Microfluidic Platforms. Micromachines 2018, 9, 453.

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