Time-Resolved Photoelectron Spectroscopies Using Synchrotron Radiation: Past, Present, and Future

Yamamoto, Susumu; Matsuda, Iwao

doi:10.7566/jpsj.82.021003

Cited by 39 publications

(18 citation statements)

References 117 publications

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“…1 Especially the high flux and tunable energy allow for using spectroscopic methods such as X-ray photoelectron spectroscopy (XPS) as an in situ measuring tool for determining the surface composition. 2 Thereby, not only a much better energy resolution but also much shorter data acquisition times than in typical lab experiments were achieved.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

Höfert

Gleichweit

Steinrück

et al. 2013

Review of Scientific Instruments

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Articles you may be interested in Light-induced changes in an alkali metal atomic vapor cell coating studied by X-ray photoelectron spectroscopy J. Appl. Phys. 114, 094513 (2013) We introduce a new approach for ultrafast in situ high-resolution X-ray photoelectron spectroscopy (XPS) to study surface processes and reaction kinetics on the microsecond timescale. The main idea is to follow the intensity at a fixed binding energy using a commercial 7 channeltron electron analyzer with a modified signal processing setup. This concept allows for flexible switching between measuring conventional XP spectra and ultrafast XPS. The experimental modifications are described in detail. As an example, we present measurements for the adsorption and desorption of CO on Pt(111), performed at the synchrotron radiation facility BESSY II, with a time resolution of 500 μs. Due to the ultrafast measurements, we are able to follow adsorption and desorption in situ at pressures of 2 × 10 −6 mbar and temperatures up to 500 K. The data are consistently analyzed using a simple model in line with data obtained with conventional fast XPS at temperatures below 460 K. Technically, our new approach allows measurement on even shorter timescales, down to 20 μs. © 2013 AIP Publishing LLC. [http://dx

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Section: Introductionmentioning

confidence: 99%

Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

Höfert

Gleichweit

Steinrück

et al. 2013

Review of Scientific Instruments

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“…Hence, the dynamics of excited electrons have been successfully explored; for example, an ultrafast relaxation process in the conduction band, as demonstrated in Figure 6 [48], a single-to-triplet conversion at an organic p/n heterojunction [49], and a spin-injection process through the ferromagnet/organic semiconductor interface [50]. In TRXPS experiments, on the other hand, the femtosecond laser and the SR light in the X-ray region are combined, and photoexcited states are monitored via XPS [51,52]. TRXPS enables us, in principle, to have a local view of the excitation state, since the core electrons are localized at the atoms that they belong to and their binding energies are sensitive to the chemical environment surrounding the atoms.…”

Section: Trxps and Spv A Time-resolved Xpsmentioning

confidence: 99%

A Surface Science Approach to Unveiling the TiO<sub>2</sub> Photocatalytic Mechanism: Correlation between Photocatalytic Activity and Carrier Lifetime

Ozawa

Yamamoto

Mase

et al. 2019

e-J. Surf. Sci. Nanotechnol.

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Establishing an accurate view of the photocatalytic mechanism of titanium dioxide (TiO2) has been a challenging task since the discovery of the Honda-Fujishima effect. Despite the great success of catalytic studies in elucidating the chemical and physical aspects of photocatalysis, many questions remain. A surface science approach, which is characterized by the use of atomically well-defined surfaces in precisely controlled environments, is a powerful tool to shed light on the fundamental mechanism, especially the dynamics of photoexcited carriers. In the present contribution, recent progress in photocatalytic research that correlates photocatalytic activity and carrier dynamics on rutile and anatase TiO2 is reviewed. A special focus is placed on the lifetime of photoexcited carriers. We present a method to determine the carrier lifetime; pump-probe time-resolved soft X-ray photoelectron spectroscopy, utilizing an ultraviolet laser as a pump light and a synchrotron radiation as a probe light. The carrier lifetime is found to be linearly correlated with the photocatalytic decomposition/desorption rate of acetic acid adsorbed on single-crystal TiO2 surfaces. The important role of a potential barrier on the TiO2 surface, which influences the carrier lifetime and the photocatalytic activity, is discussed.

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“…Other time resolved experiments [15] demand for sophisitcated experimental setups which allow ultra fast time resolution into the fsec regime. Another commonly used approach is a pump-probe setup which utilizes synchronized data acquisition with the pump and probe light pulses.…”

Section: The Hemispherical Electron Analysermentioning

confidence: 99%

A new dynamic-XPS end-station for beamline P04 at PETRA III/DESY

Babenkov

Aristov

Молодцова

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tWe report on a new dynamic-XPS end-station for real-time investigations of advanced materials. The end-station is based on a new Argus hemispherical electron spectrometer with high speed detection system. In combination with the high brilliance XUV beamline P04 at PETRA III it provides users at PETRA III a unique tool for fast (down to 0.1 s/spectrum) and detailed investigations compared to existing XPS devices at other beamlines.

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Time-Resolved Photoelectron Spectroscopies Using Synchrotron Radiation: Past, Present, and Future

Cited by 39 publications

References 117 publications

Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

A Surface Science Approach to Unveiling the TiO<sub>2</sub> Photocatalytic Mechanism: Correlation between Photocatalytic Activity and Carrier Lifetime

A new dynamic-XPS end-station for beamline P04 at PETRA III/DESY

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