Results 261 to 270 of about 2,354,533 (305)

Nanosecond time-resolved IR study of thiobenzoylnitrene

Physical Chemistry Chemical Physics, 2012
Nanosecond time-resolved infrared (TRIR) spectroscopy has been used to observe singlet thiobenzoylnitrene at 1740 cm(-1) upon photolysis of 5-phenyl-1,2,3,4-thiatriazole in acetonitrile and dichloromethane. Consistent with the experimental observations, thiobenzoylnitrene is predicted by B3LYP/6-31G* calculations to have a singlet ground state with an ...
Yonglin, Liu, Anthony S, Evans, John P, Toscano   +2 more
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Time-resolved studies of individual molecular rotors

Journal of Physics: Condensed Matter, 2010
Thioether molecular rotors show great promise as nanoscale models for exploring the fundamental limits of thermally and electrically driven molecular rotation. By using time-resolved measurements which increase the time resolution of the scanning tunneling microscope we were able to record the dynamics of individual thioether molecular rotors as a ...
April D, Jewell, Heather L, Tierney, Ashleigh E, Baber, Erin V, Iski, Michael M, Laha, E Charles H, Sykes   +5 more
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Stimulated Emission in ZnO Nanostructures:  A Time-Resolved Study

The Journal of Physical Chemistry B, 2005
Stimulated emission was studied using time-integrated and time-resolved photoluminescence in ZnO comb, tetrapod, and rod nanostructures. All the measurements were performed on ensembles of the nanostructures. The nanostructures were fabricated by vapor deposition (combs, tetrapods) and hydrothermal methods (rods). While stimulated emission was detected
Phillips, DL, Kwok, WM, Djurišić, AB, Chan, WK, Leung, YH   +4 more
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Stain Effects Studied by Time-Resolved Infrared Imaging

Analytical Chemistry, 2008
Pattern formation in evaporating colloidal droplets is an important phenomenon that is commonly observed in several solute-solvent systems; this is also an emerging technique for obtaining fine patterning through controlled conditions of drying. After evaporation of the solvent a ring-like pattern remains on the solid substrate under the condition of ...
Innocenzi, P., Malfatti, L., Piccinini, M., Grosso, D., Marcelli, A.   +4 more
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Time-resolved studies of biexcitons in GaAs

Solid State Communications, 1989
Abstract Using time-window photoluminescence spectroscopy we have unambigously observed a transition corresponding to biexcitons in GaAs. The biexciton luminescence line was found to have a superlinear dependence of luminescence intensity vs. excitation density as well as a shorter lifetime than the polariton.
T.W. Steiner, A.G. Steele, S. Charbonneau, M.L.W. Thewalt, Emil S. Koteles, B. Elman   +5 more
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Time Resolved Studies Of Adsorbed Species

SPIE Proceedings, 1985
A time-resolved Fourier transform IR study of ethyne adsorbed on ZnNaA zeolite yields results very different from those reported for related systems. Initially two species (A and B) are formed by the interaction of C2H2 with the cations. Whereas species A (π-bonded C2H2) was found to be removed immediately on evacuation, species B (probably Zn ...
J. Howard, J. M. Nicol
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Time-resolved photoluminescence study of InSe

Solid State Communications, 1985
Time-resolved photoluminescence spectra of InSe at superfluid He temperatures show that one broad luminescence feature centred at 1315meV is due to donor-acceptor pair recombination whereas other, lower energy broad bands are not. The sharp lines around 1333meV were identified as bound exciton luminescence from their transient behaviour.
J.L. Brebner, T. Steiner, M.L.W. Thewalt
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Time-resolved studies of excitonic polaritons

Journal of Luminescence, 1991
Abstract The kinetic properties of the secondary emission of excitonic polaritons are reviewed, based on experiments on molecular (anthracene) and semiconductor (CdS, GaAs, InP, etc.) crystals at low temperatures. First, coherent propagation effects are considered, including group velocity renormalization, the appearance of optical precursors and ...
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Time-Resolved Spectroscopic Studies of Perovskites

2019
Nie ...
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Time-resolved fluorescence studies on flavins.

1989
Flavins are ubiquitous in nature. They mediate in electron transfer and oxidation reactions in both bacterial, mammalian and plant systems (for a review see Muller, 1983). The natural cofactors are flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN), which occur in protein-bound form (Figure 1).
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