Results 241 to 250 of about 1,613,986 (294)

Exciton and charge transfer processes within singlet fission micelles. [PDF]

Chem Sci
Malinowski D, He G, Salcido-Santacruz B, Majumder K, Kwon J, Sfeir MY, Campos LM.   +6 more
europepmc   +1 more source

Pinning Down Small Populations of Photoinduced Intermediates Using Transient Absorption Spectroscopy and Time-Dependent Density Functional Theory Difference Spectra to Provide Mechanistic Insight into Controlling Pyridine Azo Dynamics with Protons. [PDF]

J Phys Chem Lett
Knepp ZJ, Hamburger RC, Thongchai IA, Englehart K, Sorto K, Jaffer A, Young ER, Fredin LA.   +7 more
europepmc   +1 more source

Transient Absorption of the Chlorophyll a in Ethanol

Chinese Journal of Chemical Physics, 2006
The excited state of Chlorophyll a is investigated by femtosecond transient absorption. The transient absorption spectra of Q band and By band of Chlorophyll a in ethanol have been observed. The fast kinetics of Chlorophyll a which exhibit two ultrafast components were also measured.
Ying Shi, Y. J. Shiu, Charlene Su, S. H. Lin, Ke-li Han   +4 more
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Ultrahigh sensitive transient absorption spectrometer

Review of Scientific Instruments, 2021
Transient absorption (TA) spectroscopy is considered as a powerful technique that reflects the ultrafast dynamics of photogenerated carriers in photoelectric and photocatalysis materials. However, limited by its sensitivity, the photogenerated carrier density in TA measurements of solar energy materials is usually much higher than that in the real ...
Huang Li, Gang Hu, Bo-Han Li, Wen Zeng, Jingquan Zhang, Xingan Wang, Chuanyao Zhou, Zefeng Ren, Xueming Yang   +8 more
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Transient absorption spectroscopy

2022
Die optischen Eigenschaften von organischen Farbstoffen und optisch aktiven anorganischen Molekülen werden durch ihre chemische Struktur, ihrer chemischer Umgebung, und durch das Verhalten ihrer angeregten Zustände bestimmt. Die klassischen Methoden zur Untersuchung dieser Eigenschaften sind die Absorptions- und Lumineszenzspektroskopie.
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Transient absorption in excimer-exposed silica

Applied Optics, 2000
The transient absorption produced in high-purity fused silica by exposure to a 193-nm excimer laser is investigated as a function of exposure, dissolved molecular hydrogen content, and hydrogen-related processing. Long-term recovery of transmittance was found to correlate with the dissolved molecular hydrogen concentration, whereas short-term fade was ...
C M, Smith, N F, Borrelli, R J, Araujo
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Transient Absorption Spectroscopy

2011
The concepts at the basis of transient absorption measurements were illustrated with particular reference to nanosecond kinetic spectro-photometry and femtosecond pump and probe methods. The main features of the typical experimental setups for both techniques were illustrated as regards optical parts, geometrical layout of compo-nents and light ...
Sandra Monti, Claudio Chiorboli
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Confocal transient absorption microscope

Optical Society of America Annual Meeting, 1991
Confocal laser scanning microscopes have been widely used in the 3-D measurement of surfaces and internal structures of samples. The absorption (transmission)-mode confocal microscope, however, has difficulty in the tomographic observation, because its 3-D optical transfer function is angularly band-limited, called the missing cone problem.
Keiji Sasaki, Masanori Koshioka, Hiroshi Masuhara   +2 more
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Transient response in absorptive bistability

Optics Communications, 1983
Abstract Measurements of transient response are described for a system composed of multiple beams of atomic sodium passing through a high-finesse optical cavity. For switching from zero to incident laser intensities above the upper turning point of the steady-state hysteresis cycle, a delay in excess of the empty cavity filling time is observed for ...
D.E. Grant, H.J. Kimble
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Transient Simulation of Absorption Machines

Journal of Solar Energy Engineering, 1982
This paper presents a model for a water-cooled Lithium-Bromide/water absorption chiller and predicts its transient response both during the start-up phase and during the shutoff period. The simulation model incorporates such influencing factors as the thermodynamic properties of the working fluid, the absorbent, the heat-transfer configuration of ...
D. K. Anand, R. W. Allen, B. Kumar
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