Composition depth profiling of polystyrene/poly(vinyl ethyl ether) blend thin films by angle resolved XPS

Beamson, G.; Mokarian‐Tabari, Parvaneh; Geoghegan, Mark

doi:10.1016/j.elspec.2009.02.017

Cited by 6 publications

(2 citation statements)

References 52 publications

(48 reference statements)

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“…The observation of C 1s from solvent molecules and Ag 3d of Ag nanoparticles of the same area (Figure c,d) clearly demonstrated the success of studying nanoparticles dispersed in liquid with XPS. The above deconvolution of the C 1s spectrum collected from the liquid cell containing a solvent and Ag nanoparticles (Figure c) has provided solid evidence for the existence of solvent molecules between Ag nanoparticles and the graphene membrane. , …”

Section: Resultsmentioning

confidence: 82%

“…The above deconvolution of the C 1s spectrum collected from the liquid cell containing a solvent and Ag nanoparticles (Figure 13c) has provided solid evidence for the existence of solvent molecules between Ag nanoparticles and the graphene membrane. 41,42 One potential concern is that the liquid could have leaked out of the cell and onto the off-window region if the graphene window were broken, shown schematically in Figure 14b. The lack of photoelectrons of Ag 3d collected from the off-window region of liquid cells (black spectra of Figure 8g), however, suggests that the graphene membrane of the examined liquid cell was still intact.…”

Section: Observation Of Surface Of Ag Nanoparticlesmentioning

confidence: 99%

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X-ray Photoelectron Spectroscopy Studies of Nanoparticles Dispersed in Static Liquid

et al. 2018

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For nanoparticles active for chemical and energy transformations in static liquid environment, chemistries of surface or near-surface regions of these catalyst nanoparticles in liquid are crucial for fundamentally understanding their catalytic performances at a molecular level. Compared to catalysis at a solid-gas interface, there is very limited information on the surface of these catalyst nanoparticles under a working condition or during catalysis in liquid. Photoelectron spectroscopy is a surface-sensitive technique; however, it is challenging to study the surfaces of catalyst nanoparticles dispersed in static liquid because of the short inelastic mean free path of photoelectrons traveling in liquid. Here, we report a method for tracking the surface of nanoparticles dispersed in static liquid by employing graphene layers as an electron-transparent membrane to separate the static liquid containing a solvent, catalyst nanoparticles, and reactants from the high-vacuum environment of photoelectron spectrometers. The surfaces of Ag nanoparticles dispersed in static liquid sealed in such a graphene membrane liquid cell were successfully characterized using a photoelectron spectrometer equipped with a high vacuum energy analyzer. With this method, the surface of catalyst nanoparticles dispersed in liquid during catalysis at a relatively high temperature up to 150 °C can be tracked with photoelectron spectroscopy.

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Section: Resultsmentioning

confidence: 82%

Section: Observation Of Surface Of Ag Nanoparticlesmentioning

confidence: 99%