Work Function Measurement of Modified W(100) Surface with Transition Metal by Photoemission Electron Microscopy

The Si L2,3 and C K soft X-ray emission spectra of the interface of the Ti(50 nm)/4H-SiC(substrate) system, thermally annealed from 800°C to 1000°C and characterized by soft X-ray emission spectroscopy (SXES), revealed the formation of a reacted region composed of silicides with Ti 5 Si 3 as the majority formed species and carbides in TiC-like bonding. Also, the photoemission electron microscopy (PEEM) imaging of Ti(10 nm) film on 3C-SiC surface during in situ heat treatment showed the formation of island structures (in ring clusters) at ~ 800°C.

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Interface study of transition metal (Fe, Zr) on 4H–SiC(0001)Si face: photoemission electron microscopy and soft X-ray fluorescence spectroscopy

Applied Surface Science ◽

10.1016/j.apsusc.2004.12.010 ◽

2005 ◽

Vol 249 (1-4) ◽

pp. 362-366 ◽

Cited By ~ 3

Author(s):

M. Hirai ◽

C. Kamezawa ◽

S. Azatyan ◽

Z. An ◽

T. Shinagawa ◽

...

Keyword(s):

Electron Microscopy ◽

Transition Metal ◽

Fluorescence Spectroscopy ◽

Photoemission Electron Microscopy ◽

X Ray ◽

Interface Study ◽

Photoemission Electron

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Studies of ultrafast photocarrier dynamics in spatially heterogeneous transition metal dichalcogenides using time-resolved photoemission electron microscopy

10.32657/10356/145896 ◽

2021 ◽

Author(s):

◽

Ce Xu

Keyword(s):

Electron Microscopy ◽

Transition Metal ◽

Transition Metal Dichalcogenides ◽

Time Resolved ◽

Photoemission Electron Microscopy ◽

Metal Dichalcogenides ◽

Photoemission Electron

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Resolution in photoelectron microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100086593 ◽

1991 ◽

Vol 49 ◽

pp. 458-459

Author(s):

G. F. Rempfer

Keyword(s):

Electron Microscopy ◽

Electric Field ◽

Ultraviolet Light ◽

Uniform Field ◽

Virtual Image ◽

Lens System ◽

Photoemission Electron Microscopy ◽

Planar Electrode ◽

Electron Lens ◽

Photoemission Electron

In photoelectron microscopy (PEM), also called photoemission electron microscopy (PEEM), the image is formed by electrons which have been liberated from the specimen by ultraviolet light. The electrons are accelerated by an electric field before being imaged by an electron lens system. The specimen is supported on a planar electrode (or the electrode itself may be the specimen), and the accelerating field is applied between the specimen, which serves as the cathode, and an anode. The accelerating field is essentially uniform except for microfields near the surface of the specimen and a diverging field near the anode aperture. The uniform field forms a virtual image of the specimen (virtual specimen) at unit lateral magnification, approximately twice as far from the anode as is the specimen. The diverging field at the anode aperture in turn forms a virtual image of the virtual specimen at magnification 2/3, at a distance from the anode of 4/3 the specimen distance. This demagnified virtual image is the object for the objective stage of the lens system.

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Surface reactions observed by photoemission electron microscopy (PEEM)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100121831 ◽

1992 ◽

Vol 50 (1) ◽

pp. 286-287

Author(s):

H.H. Rotermund

Keyword(s):

Electron Microscopy ◽

Electron Microscope ◽

Work Function ◽

Chemical Reactions ◽

Reaction Diffusion ◽

Dynamic Processes ◽

Clean Surface ◽

Crystal Surfaces ◽

Single Crystal Surfaces ◽

Photoemission Electron

Chemical reactions at a surface will in most cases show a measurable influence on the work function of the clean surface. This change of the work function δφ can be used to image the local distributions of the investigated reaction,.if one of the reacting partners is adsorbed at the surface in form of islands of sufficient size (Δ>0.2μm). These can than be visualized via a photoemission electron microscope (PEEM). Changes of φ as low as 2 meV give already a change in the total intensity of a PEEM picture. To achieve reasonable contrast for an image several 10 meV of δφ are needed. Dynamic processes as surface diffusion of CO or O on single crystal surfaces as well as reaction / diffusion fronts have been observed in real time and space.

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