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Incorporating Amphoteric Groups in Ion Track-etched Single Conical Nanochannels
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ali, Mohammad Ramirez, Patricio Bayer, Veronika Neumann, Ronny Ensinger, Wolfgang J. |
| Copyright Year | 2009 |
| Abstract | Here, we report a facile and straight-forward approach to incorporate amphoteric groups inside the single conical nanochannels. This was realized by direct chemical modification of the surface carboxyl groups with L-lysine chains whose positive and negative charges are very sensitive to the external pH. The chemically functionalised channels were characterized both theoretically and experimentally. The single nanochannel constitutes a universal nanofluidic diode in the sense that the amphoteric chains attached at its surface allow for a broad set of rectification properties. Briefly, the selective functionalization of lysine with surface carboxyl groups was accomplished by blocking the amino group and carboxyl group bonded to the α-carbon with Cu 2+ ion to form a copper-chelate complex. This process leaves an unprotected ε-amino group which was covalently attached with the carboxyl group created during track-etching via EDC/PFP coupling chemistry. 5 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.gsi.de/informationen/wti/library/scientificreport2008/PAPERS/MATERIALS-19.pdf |
| Alternate Webpage(s) | http://www.gsi.de/scirep2008/PAPERS/MATERIALS-19.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
