Visualization of Charge Migration in Conductive Polymers via Time-Resolved Electrostatic Force Microscopy
| Autor: | Kentaro Kajimoto, Kento Araki, Hiroshi Ohoyama, Takuya Matsumoto, Yuki Usami |
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| Rok vydání: | 2020 |
| Předmět: |
Conductive polymer
010304 chemical physics Chemistry Electrostatic force microscope Charge (physics) 010402 general chemistry Tracking (particle physics) 01 natural sciences 0104 chemical sciences Visualization Charge-carrier density Chemical physics 0103 physical sciences Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry A. 124:5063-5070 |
| ISSN: | 1520-5215 1089-5639 |
| Popis: | Charge dynamics play an important role in numerous natural phenomena and artificial devices, and tracking charge migration and recombination is crucial for understanding the mechanism and function of systems involving charge transfer. Tip-synchronized pump-probe electrostatic force microscopy simultaneously permits highly sensitive detection, microsecond time resolution, and nanoscale spatial resolution, where the spatial distribution in static measurement (usual EFM) reflects differences in the carrier density and the time evolution reveals the surface carrier mobility. By using this method, carrier injection and ejection in sulfonated polyaniline (SPAN) thin films were visualized. Comparison of tr-EFM results of SPAN thin films with different doping levels revealed the individual differences in carrier density and mobility. |
| Databáze: | OpenAIRE |
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