Spectrally resolved electronic energy transfer from silicon nanocrystals to molecular oxygen mediated by direct electron exchange

2003 ◽  
Vol 68 (11) ◽  
Author(s):  
E. Gross ◽  
D. Kovalev ◽  
N. Künzner ◽  
J. Diener ◽  
F. Koch ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Molecular Oxygen ◽  
Silicon Nanocrystals ◽  
Electronic Energy ◽  
Electron Exchange ◽  
Electronic Energy Transfer ◽  
Spectrally Resolved

Electronic Energy Transfer from Excitons Confined in Silicon Nanocrystals to Molecular Oxygen

2003 ◽  
Vol 770 ◽  
Author(s):  
E. Gross ◽  
D. Kovalev ◽  
N. Künzner ◽  
J. Diener ◽  
F. Koch ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Molecular Oxygen ◽  
Elevated Temperatures ◽  
Electronic Energy ◽  
Time Resolved ◽  
Electronic Energy Transfer ◽  
Si Nanocrystals ◽  
Developed Surface ◽  
Quenching Efficiency ◽  
Resonant Electron

AbstractWe report on efficient electronic energy transfer from excitons confined in silicon (Si) nanocrystals to molecular oxygen (MO). The remarkable photosensitizing properties of Si nanocrystal assemblies result from a broad energy spectrum of photoexcited excitons, a long triplet exciton lifetime and a highly developed surface area. Quenching of photoluminescence (PL) of Si nanocrystals by MO physisorbed on their surface is found to be most efficient when the energy of excitons coincides with the triplet-singlet splitting energy of oxygen molecules. Spectroscopic analysis of the quenched PL spectrum evidences that energy transfer is accompanied by multi-phonon emission. From time-resolved measurements the characteristic time of energy transfer is found to be in the range of microseconds. The dependence of PL quenching efficiency on the surface termination of nanocrystals is consistent with short-range resonant electron exchange mechanism of energy transfer. The energy transfer to oxygen molecules in the gaseous phase at elevated temperatures is demonstrated.

Resonant Electronic Energy Transfer from Excitons Confined in Silicon Nanocrystals to Oxygen Molecules

2002 ◽  
Vol 89 (13) ◽  
Author(s):  
D. Kovalev ◽  
E. Gross ◽  
N. Künzner ◽  
F. Koch ◽  
V. Yu. Timoshenko ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Silicon Nanocrystals ◽  
Electronic Energy ◽  
Electronic Energy Transfer

scholarly journals Damming an Electronic Energy Reservoir: Ion-regulated Electronic Energy Shuttling in a [2]Rotaxane

2021 ◽  
Author(s):  
Shilin Yu ◽  
Gediminas Jonusauskas ◽  
Jean-Luc Pozzo ◽  
Stephen Goldup ◽  
Vicente Martí Centelles ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Electronic Energy ◽  
Electronic Energy Transfer

We demonstrate the first example of bidirectional reversible electronic energy transfer (REET) between the mechanically bonded components of a rotaxane. Our prototypical system was designed such that photoexcitation of a...

Spectroscopic confirmation of reversible electronic energy transfer in methylglyoxal

1975 ◽  
Vol 63 (1) ◽  
pp. 593-594 ◽  
Author(s):  
R. L. Opila ◽  
R. A. Coveleskie ◽  
James T. Yardley
Keyword(s):  
Energy Transfer ◽  
Electronic Energy ◽  
Electronic Energy Transfer

Vibrational relaxation and electronic energy transfer ofN2aggregates in solid Xe matrices

1985 ◽  
Vol 31 (8) ◽  
pp. 4854-4865 ◽  
Author(s):  
H. Kühle ◽  
J. Bahrdt ◽  
R. Fröhling ◽  
N. Schwentner ◽  
H. Wilcke
Keyword(s):  
Energy Transfer ◽  
Vibrational Relaxation ◽  
Electronic Energy ◽  
Electronic Energy Transfer

Electronic energy transfer in beam pumped gas mixtures

1974 ◽  
Vol 10 (9) ◽  
pp. 752-752
Author(s):  
R. Hill ◽  
D. Eckstrom ◽  
R. Gutcheck ◽  
D. Huestis ◽  
D. Lorents ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Gas Mixtures ◽  
Electronic Energy ◽  
Electronic Energy Transfer
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