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Steady-state electrochemical determination of lipidic nanotube diameter utilizing an artificial cell model
- Source :
- Analytical chemistry. 82(3)
- Publication Year :
- 2009
-
Abstract
- By exploiting the capabilities of steady-state electrochemical measurements, we have measured the inner diameter of a lipid nanotube using Fick's first law of diffusion in conjunction with an imposed linear concentration gradient of electroactive molecules over the length of the nanotube. Fick's law has been used in this way to provide a direct relationship between the nanotube diameter and the measurable experimental parameters Deltai (change in current) and nanotube length. Catechol was used to determine the Deltai attributed to its flux out of the nanotube. Comparing the nanotube diameter as a function of nanotube length revealed that membrane elastic energy was playing an important role in determining the size of the nanotube and was different when the tube was connected to either end of two vesicles or to a vesicle on one end and a pipet tip on the other. We assume that repulsive interaction between neck regions can be used to explain the trends observed. This theoretical approach based on elastic energy considerations provides a qualitative description consistent with experimental data.
- Subjects :
- Models, Molecular
Nanotube
Steady state
Nanotubes
Chemistry
Diffusion
Elastic energy
Analytical chemistry
Catechols
Flux
Electrochemical Techniques
Electrochemistry
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Article
Analytical Chemistry
Condensed Matter::Materials Science
Membrane
Chemical physics
Liposomes
Nanotube membrane
Subjects
Details
- ISSN :
- 15206882
- Volume :
- 82
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Analytical chemistry
- Accession number :
- edsair.doi.dedup.....aee8cc74cd05140b39713194dab82b4c