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Dual plasmonic nanostructures for switching polarity of hot electron-induced photocurrent
- Source :
- Nanoscale. 12(27)
- Publication Year :
- 2020
-
Abstract
- We report on the experimental investigation of polarity-switchable hot electron-induced photocurrents in dual-plasmonic nanostructures, consisting of two layers of gold nanoparticles (AuNPs) separated by a TiO2 film. Hot electrons generated through the non-radiative decay of the localized surface plasmon resonances supported by the top and bottom layers of AuNPs can be simultaneously injected into the TiO2 film in opposite directions and counteract each other. As a result, the polarity and magnitude of the net photocurrents can be tailored by controlling the population of hot electrons either generated from or collected by the two layers of AuNPs. We believe the wavelength-dependent photocurrent polarity switching could be useful for biosensors with a direct electrical readout and photoconversion applications.
- Subjects :
- Photocurrent
education.field_of_study
Materials science
Nanostructure
Polarity (physics)
business.industry
Population
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Colloidal gold
Optoelectronics
General Materials Science
0210 nano-technology
business
education
Biosensor
Hot electron
Localized surface plasmon
Subjects
Details
- ISSN :
- 20403372
- Volume :
- 12
- Issue :
- 27
- Database :
- OpenAIRE
- Journal :
- Nanoscale
- Accession number :
- edsair.doi.dedup.....dc2121d6381cd7b507045e1dad2c5866