Journal
ELECTROPHORESIS
Volume 34, Issue 15, Pages 2169-2176Publisher
WILEY-BLACKWELL
DOI: 10.1002/elps.201300024
Keywords
Color laser printer; Contactless detection; Direct-printing technology; Micro-fluidic devices
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [477067/2010-7, 478911/2012-2]
- Fundacao de Amparo a Pesquisa do Estado de Goias (FAPEG)
- CNPq
Ask authors/readers for more resources
This paper reports for the first time the use of colored toner to produce polyester toner (PT) ME devices. Colored PT devices were designed in drawing software and printed on a polyester film using a color laser printer with 3600 dpi resolution. The colored toner is composed of a copolymer mixture (styrene and acrylate), wax, silicon dioxide, and pigments. The presence of silica in the toner composition has enhanced the EOF magnitude and improved the analytical performance. For a pH range between 2 and 12, the EOF-measured on a magenta PT chip, for example, ranged from 3.8 to 5.8 (x 10(-4) cm(2) V-1 s(-1)). Typical separations of inorganic cations (K+, Na+, and Li+) were used as model system to investigate the analytical feasibility of the proposed devices. The repeatability for the migration times of all analytes exhibited RSD values lower than 1% (n = 10). The separation efficiencies found on colored PT devices ranged from 10 000 to 49 000 plates/m, which means between 7 and 23% of the maximum theoretical efficiency on this microfluidic platform (1.85 x 10(5) plates/m). The improvements achieved on the proposed devices are associated with the small additional amount of silica on the toner composition as well as the printing of channels with smoother surfaces and better uniformity when compared to the conventional PT chips printed with monochromatic laser printers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available