Electric-Double-Layer-Modulation Microscopy
| Autor: | Namink, Kevin, Meng, Xuanhui, Koper, Marc T.M., Kukura, Philipp, Faez, Sanli, Sub Nanophotonics, Nanophotonics |
|---|---|
| Přispěvatelé: | Sub Nanophotonics, Nanophotonics |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanostructure FOS: Physical sciences General Physics and Astronomy Ionic bonding 02 engineering and technology Condensed Matter - Soft Condensed Matter Physics and Astronomy(all) Electrochemistry Metrology 01 natural sciences Ion Polarizability Physics - Chemical Physics 0103 physical sciences Microscopy Taverne 010306 general physics Chemical Physics (physics.chem-ph) Scattering Electrostatic double layer forces 021001 nanoscience & nanotechnology Chemical physics Soft Condensed Matter (cond-mat.soft) Cyclic voltammetry 0210 nano-technology Physics - Optics Optics (physics.optics) |
| Zdroj: | Physical Review Applied, 13(4). American Physical Society Physical Review Applied, 13(4), 044065. AMER PHYSICAL SOC |
| ISSN: | 2331-7019 |
| Popis: | The electric double layer (EDL) formed around charged nanostructures at the liquid-solid interface determines their electrochemical activity and influences their electrical and optical polarizability. We experimentally demonstrate that restructuring of the EDL at the nanoscale can be detected by dark-field scattering microscopy. Temporal and spatial characterization of the scattering signal demonstrates that the potentiodynamic optical contrast is proportional to the accumulated charge of polarisable ions at the interface and its time derivative represents the nanoscale ionic current. The material-specificity of the EDL formation is used in our work as a label-free contrast mechanism to image nanostructures and perform spatially-resolved cyclic voltametry on ion current density of a few attoamperes, corresponding to the exchange of only a few hundred ions. Comment: 6 pages, 4 figrues |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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