Excited Carrier Dynamics of α-Cr2O3/α-Fe2O3 Core-Shell Nanostructures
Journal Article
·
· Journal of Physical Chemistry B, 110(34):16937-16940
In this work ?-Cr2O3/?-Fe2O3 core-shell polycrystalline nanostructures were synthesized using ?-Cr2O3 nanoparticles as seed crystals during aqueous nucleation. The formation of ?-Fe2O3 polycrystallites on ?-Cr2O3 surfaces were confirmed by x-ray diffraction, transmission electron microscopy, and energy dispersive x-ray analysis. The excited state relaxation dynamics of as-grown core-shell structures and ''pure'' ?-Fe2O3 particles of the same size were measured using femtosecond transient absorption spectroscopy. The results show the carrier lifetimes decay within a few picoseconds regardless of sample. This is likely due to fast recombination/trapping of carriers to defects and iron d-states.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 891140
- Report Number(s):
- PNNL-SA-50398; 11102
- Journal Information:
- Journal of Physical Chemistry B, 110(34):16937-16940, Journal Name: Journal of Physical Chemistry B, 110(34):16937-16940
- Country of Publication:
- United States
- Language:
- English
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