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Published on: May 12, 2023
Ultrafast static and diffusion-controlled electron transfer at Ag29 nanocluster/molecular acceptor interfaces
Shawkat M Aly1, Lina G AbdulHalim1, Tabot M D Besong1
1Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia. osman.bakr@kaust.edu.sa omar.abdelsaboor@kaust.edu.sa.
Silver nanoclusters (Ag29 NCs) show efficient light harvesting. Both dynamic and static electron transfer mechanisms contribute to the photoluminescence quenching of these nanoclusters.
Area of Science:
- Materials Science
- Photochemistry
- Nanotechnology
Background:
- Silver nanoclusters (Ag29 NCs) exhibit promising properties for light-harvesting applications.
- Efficient visible light absorption and long excited-state lifetimes are key characteristics of Ag29 NCs.
Purpose of the Study:
- To investigate the photophysical processes occurring at the interface of Ag29 NCs and methyl viologen (MV(2+)).
- To elucidate the mechanisms responsible for the photoluminescence quenching of Ag29 NCs.
Main Methods:
- Femtosecond and nanosecond time-resolved spectroscopy.
- Photoluminescence quenching measurements at Ag29 NC/MV(2+)) interfaces.
Main Results:
- Ultrafast and efficient electron injection was observed at the Ag29 NC/MV(2+)) interface upon optical excitation.
- Both dynamic and static electron transfer mechanisms were identified as contributors to the photoluminescence quenching of Ag29 NCs.
Conclusions:
- Ag29 NCs are effective light-harvesting materials due to their optical properties.
- The photoluminescence quenching of Ag29 NCs involves complex electron transfer dynamics, including both dynamic and static components.
