Abstract
Ion transport through functionalized carbon nanotubes in an external electric field is studied using all atom molecular dynamics simulations. The surface of carbon nanotubes has been functionalized with hydrogens and hydroxyl groups, and ionic current passing through the nanochannels has been examined with respect to the extent of surface modification. We are able to dramatically increase the ionic current passing through the nanotube via the appropriate surface modification. An analysis of the electrostatic potential within the tube shows higher ionic currents result from an increase in accessible pathways coupled with a global shift toward more direct ion passage. Moreover, through judicious choice of structure, the current can be modulated to a large degree with ion selectivity.
Original language | English (US) |
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Pages (from-to) | 154-159 |
Number of pages | 6 |
Journal | Applied Surface Science |
Volume | 423 |
DOIs | |
State | Published - Nov 30 2017 |
Externally published | Yes |
Keywords
- Ion current
- Modified carbon nanotube
- Molecular dynamics
- Selectivity
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- General Physics and Astronomy
- Surfaces and Interfaces
- Surfaces, Coatings and Films