Utilizing a cation-exchange membrane like Nafion makes it possible to electrically induce the concentration difference across the membrane. The resulting osmosis of water augments the overall flowrate in addition to the electroosmosis. The thinner the membrane, the stronger the osmotic flow is induced electrically. This behavior can be predicted from the conventional transport model for…
The basic principle of inducing the osmotic pressure to suppress back pressure is based on the counterbalance of the opposing flows of solvent. Consider an electrolytic cell composed of a pair of Ag/AgCl electrodes and a Nafion-coated pnc-Si membrane separating NaCl solution into two halves. Initially, the electrolyte in either half has the same concentration…
Aminosilane has been used widely to derivatize the surface of silica for the applications in analytical chemistry, biochemistry, and biomedicine. It also plays an important role in providing adhesion for Nafion coating on silica surface. The basic principle is described as follows. After oxidizing the surface of silicon, the next step involves the derivatization of…
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