We've updated our Privacy Policy to make it clearer how we use your personal data.
We use cookies to provide you with a better experience, read our Cookie Policy
EP25661
Abstract: Microfluidic paper-based analytical devices (PADs) have gained a lot of attention for their attractive features owing to the use of paper as a substrate, such as being low-cost, easily and safely disposable by incineration and allowing pump-free sample transport driven by capillary forces. However, it is still challenging to perform sub-microliter sample analyses by PADs, mainly because of large dimensions of microfluidic structures and the open system prone to evaporation of the sample liquid. In this work, we demonstrate the advantages of using a hot laminator instead of a hot plate in the wax printing-based microfluidic patterning method. The shortened heating time and the pressure applied to the paper substrate by the hot rollers contribute to the formation of high-resolution microfluidic structures. Consideration of the device geometry and the influence of cellulose fiber direction in the filter paper substrate have led to a model PAD design with four microfluidic channels that can be filled with as low as 0.5 µL of liquid. A colorimetric protein assay was performed targeting tear fluid protein analysis. This PAD allows to obtain quadruplicate colorimetric data by single pipetting of a sub-microliter sample. Finally, the strength of fully enclosed microfluidic structures in PADs, achieved by device lamination, is demonstrated for sample volume-independent quantitative assays. Prevention of evaporation by lamination leads to controlled sample liquid uptake, resulting in constant colorimetric signals regardless of the sample volume applied to the PAD, which is a significant advantage for practical applications.Summary: Laminated microfluidic paper-based analytical devices for clinical protein assays
Ask the author a question about this poster.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Related Posters
Comparison of hepatocytes in monolayer and RAFT™ 3D Cell Culture System
Therese Willstaedt, Maureen Bunger, Lubna Hussain, and Theresa D’Souza
Investigation of the graphene-on-silicon-carbide and CVD graphene as a basis for bioimpedance sensor applications
Natalja Sleptsuk (a), Raul Land (a), Jana Toompuu (a), Alexander Lebedev (b), Valery Davydov (b), Ilya Eliseyev (b), Evgenia Kalinina (b), Oleg Korolkov (a) and Toomas Rang (a)
High-throughput Carbonic Anhydrase Activity and Inhibitor Screening Assays
Suratna Hazra, Ph.D., Grigoriy Tchaga, Ph.D., and Gordon Yan, Ph.D.
A High-Throughput Assay to Measure Phosphoenolpyruvate Carboxykinase (PEPCK) Activity in Biological Samples
Shunan Li, Ph.D., Keith Cheung, Ph.D. Grigoriy Tchaga, Ph.D. Jianping Xu, Ph.D. and Gordon Yan, Ph.D. Acknowledments: Kyle Schmitt, Ph.D • Tanvi Gangakhedkar • Gustavo Chavarria, Ph.D. • Kwang Kim, Ph.D. • Robert Stephenson, Ph.D. • Hong Qu, Ph.D.
ELECTROWETTING CHIP ON PAPER BASED SUBSTRATE
Nurul Amziah Md Yunus and Noor Faezah Ismail