Investigation of electroosmotic flow in nanosilica particle packed capillaries

An experimental investigation of electroosmotic flow (EOF) in nanosilica particle packed capillaries was carried out. The packed capillaries were fabricated by packing 10 nm, 30 nm, 50 nm, and 360 nm nanosized silica particles into fused silica capillaries of 5 cm x 320 mu m i.d. x 800 mu m o.d. The EOF within the packed capillary was characterized and evaluated by measuring the EOF, as well as the electric properties using two salt free liquids: water, methanol, and an aqueous 1-1 electrolyte liquid: sodium chloride solution. The results reflected the influence of the electric double layer (EDL) on the EOF in nanochannel interspaces, which would be helpful for nanochannel study in microfluidic and nanofluidic systems and capillary electroseparation (CES) methods that involve chromatography stationary phase research