Electrophoretic separation of aniline derivatives using fused silica capillaries coated with acid treated single-walled carbon nanotubes.
This paper reports on a new strategy for coating fused silica capillaries based on the ionic adsorption of acid treated single-walled carbon nanotubes (SWCNTs) on a poly(diallydimethylammonium chloride)-modified fused silica surface. The coated capillaries were used to demonstrate their performance for baseline separation of a mixture of seven nitrogen-containing aromatic compounds compared to capillary zone electrophoresis. This combined layer formed a coating material that could be useful for improvement of the selectivity of the solutes in an electrical field. We reasoned that the interaction of the solutes and the modified capillary wall occurred mainly via ionic interactions with the charged moieties of CNTs. The single-walled CNT modified capillaries were very stable and could be used for over 200 repeated analyses without compromising its analytical performance.
Luong
John H T
JH
Biotechnology Research Institute, National Research Council Canada, Nanobiotechnology Group, 6100 Royalmount Avenue, Montreal, Que., Canada H4P 2R2. john.luong@cnrc-nrc.gc.ca
Bouvrettea
Pierre
P
Liu
Yali
Y
Yang
De-Quan
DQ
Sacher
Edward
E
D000814:Aniline Compounds / Q000302:isolation & purification*; D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D018625:Microscopy, Atomic Force; D037742:Nanotubes, Carbon / Q000737:chemistry; D009995:Osmosis; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; D012822:Silicon Dioxide
D000814:Aniline Compounds; D037742:Nanotubes, Carbon; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; D012822:Silicon Dioxide