NDLI: Controlling wettability in paper by atmospheric-pressure microplasma processes to be used in µPAD fabrication

Content Provider	Springer Nature Link
Author	Hecht, Lars Philipp, Jens Mattern, Kai Dietzel, Andreas Klages, Claus Peter
Copyright Year	2016
Abstract	Paper-based microfluidic systems are of great interest for cheap, disposable point-of-care diagnostic devices, especially for the use in the developing countries. The development of reliable and cost-effective fabrication methods is therefore of great importance. We present two novel methods and experimental setups for the area-selective creation of hydrophilic channels and hydrophobic barriers utilizing atmospheric-pressure microplasmas based on dielectric barrier discharges within the pores of the paper substrate. One approach is based on a local plasma etching process which is able to remove a hydrophobic coating from the paper fibers, while a second, alternative method uses patterned plasma polymerization to deposit a hydrophobic coating on the fiber structure. Both methods utilize microstructured electrodes to shape the plasma discharge volume to allow the fabrication of microfluidic structures in the substrate. We report on the influence of various processing parameters on the fabrication process and compare the minimal structure dimensions obtained so far and maximum wicking distances achieved. Both fabrication methods led to promising results with structure dimensions of around 400 µm, but the plasma etching process turned out to be superior due to lower cost, faster processing, and better structure edge definition.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	20
Issue Number	1
e-ISSN	16134990
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-01-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Microplasmas Dielectric barrier discharges Plasma processing Microfluidics Paper substrates Wetting Bio sensors Engineering Fluid Dynamics Biomedical Engineering Analytical Chemistry Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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