Enhanced electrophoretic DNA separation in photonic crystal fiber
Kwok, Yien Chian
Date of Issue2009
School of Mechanical and Aerospace Engineering
Joule heating generated by the electrical current in capillary electrophoresis leads to a temperature gradient along the separation channel and consequently affects the separation quality. We describe a method of reducing the Joule heating effect by incorporating photonic crystal fiber into a micro capillary electrophoresis chip. The photonic crystal fiber consists of a bundle of extremely narrow hollow channels, which ideally work as separation columns. Electrophoretic separation of DNA fragments was simultaneously but independently carried out in 54 narrow capillaries with a diameter of 3.7 μm each. The capillary bundle offers more efficient heat dissipation owing to the high surface-to-volume ratio. Under the same electrical field strength, notable improvement in resolution was obtained in the capillary bundle chip.
Analytical and bioanalytical chemistry
© 2009 Springer-Verlag. This is the author created version of a work that has been peer reviewed and accepted for publication by Analytical and bioanalytical chemistry, Springer-Verlag. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1007/s00216-009-2833-6.