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Ultrafast coherence transfer in DNA-templated silver nanoclusters
Erling Thyrhaug1, Sidsel Ammitzbøll Bogh2, Miguel R Carro-Temboury2
1Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden.
Nature Communications
|May 27, 2017
Summary
DNA-templated silver nanoclusters exhibit strong light absorption and emission. Ultrafast relaxation dynamics are coupled to vibrations, enabling rapid energy transfer between excited states.
Area of Science:
- Nanomaterials Science
- Physical Chemistry
- Spectroscopy
Background:
- DNA-templated silver nanoclusters show promise for microscopy and sensing.
- Their excited-state structure and dynamics remain poorly understood.
Purpose of the Study:
- Investigate the energy-level structure of silver nanoclusters.
- Elucidate the early-time relaxation cascade in these nanomaterials.
Main Methods:
- Utilized multidimensional spectroscopy.
- Analyzed ultrafast intramolecular relaxation dynamics.
Main Results:
- Identified strong coupling between relaxation and a specific vibrational mode.
- Observed concerted population and coherence transfer between excited states.
- Characterized dynamics on a sub-100 femtosecond timescale.
Conclusions:
- The study reveals key insights into the excited-state dynamics of silver nanoclusters.
- Understanding these dynamics is crucial for optimizing their optical properties and applications.
