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. 2016 Jun 28;7(7):108. doi: 10.3390/mi7070108

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© 2016 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scanning electron microscopy of cellulose powder in fabricated device and Whatman No. 1: (a) Microstructure of cellulose powder under microscope (50×); (b) Microstructure of cellulose powder under microscope (200×); (c) Microstructure of chromatography paper Whatman No. 1 under microscope (50×); (d) Microstructure of chromatography paper Whatman No. 1 under microscope (200×); (e) A dying test on a μ3DPAD with a channel of 4 mm width; (f) Gray value distribution of the dye in the channel.