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. Author manuscript; available in PMC: 2014 Aug 15.
Published in final edited form as: Nat Nanotechnol. 2012 Jan 15;7(2):133–139. doi: 10.1038/nnano.2011.240

Table 1.

Electrophoretic mobilities of K+, Na+, Li+, H+, and Ru(bpy)32+ using 2 Ag/AgCl electrodes electrochemical cell system (applied bias, -600 mV); pore area is 1.4×10−11 m2. Solution concentrations are 1 mM KCl, NaCl, LiCl, HCl, 0.33 mM K3(Fe(CN)6), 0.5 mM Ru(bpy)3Cl2, and 0.14 mM sulfated cyclodextrin

K+ Na+ Li+ H+ K+ K3(Fe(CN)6) Na+ Na7(SO3)7− cyclodextrin Ru(bpy)32+ Ru(bpy)3Cl2
Conc. (mM) 1 1 1 1 0.33 0.14 0.5
Ionic Current (nA) 80 69 50 200 57 37 58
Measured EM, (m2/s.V) 2.3E-07 1.6E-07 9.6E-08 9.6E-07 1.5E-07 (3.3E-07)* 9.6E-08 (2.2E-07)* 1.1E-07
Bulk EM, (m2/s.V) 7.6E-08 5.2E-08 3.9E-08 3.6E-07 7.6E-08 5.2E-08 3.6E-08
Ratio of Measured EM to bulk EM 3.0 3.1 2.5 2.7 2.0 (4.4)* 1.8 (4.2)* 2.9
*

The electrophoretic mobilities are calculated assuming that Fe(CN)63− and CD(SO3)77− are completely rejected, and so the transport number of K+ and Na+ are 1.