Scaling Behavior for Ionic Transport and its Fluctuations in Individual Carbon Nanotubes
| Autor: | Laetitia Jubin, Lydéric Bocquet, Antoine Niguès, Alessandro Siria, Eleonora Secchi |
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| Jazyk: | angličtina |
| Předmět: |
Materials science
FOS: Physical sciences General Physics and Astronomy chemistry.chemical_element Ionic bonding Nanotechnology 02 engineering and technology Carbon nanotube Condensed Matter - Soft Condensed Matter 010402 general chemistry 01 natural sciences Noise (electronics) Article law.invention chemistry.chemical_compound Condensed Matter::Materials Science Adsorption law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physics::Atomic and Molecular Clusters Surface charge Condensed Matter - Mesoscale and Nanoscale Physics Conductance 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical physics Boron nitride Soft Condensed Matter (cond-mat.soft) 0210 nano-technology Carbon |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.116.154501 |
| Popis: | In this letter we perform an experimental study of ionic transport and current fluctuations inside individual Carbon Nanotubes (CNT). The conductance exhibits a power law behavior at low salinity, with an exponent close to 1/3 versus the salt concentration. This scaling behavior is rationalized in terms of a model accounting for hydroxide adsorption at the (hydrophobic) carbon surface, leading to a density dependent surface charge. This is in contrast to boron nitride nanotubes which exhibit a constant surface conductance. Further we measure the low frequency noise of the ionic current in CNT and show that the amplitude of the noise scales with the surface charge, with data collapsing on a master curve for the various studied CNT at a given pH. to appear in Physical Review Letters (2016); Supplementary material upon request |
| Databáze: | OpenAIRE |
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