𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Charging Phenomena and Charge Compensation in AES on Metal Oxides and Silica

✍ Scribed by Guo, Hansheng; Maus-Friedrichs, W.; Kempter, V.

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
378 KB
Volume
25
Category
Article
ISSN
0142-2421

No coin nor oath required. For personal study only.

✦ Synopsis

Charging processes on the bulk oxides and occurring during Auger Electron Spectroscopy Al 2 O 3 , ZrO 2 SiO 2 (AES) are studied. All samples experience a negative charge-up under the following parameters : electron beam energy > 1 keV, current density > 10-2 A cm-2 and di †erent angles of incidence. The samples show strong history e †ects as a function of previous irradiation damage. For charge compensation, Environmental Auger Electron Spectroscopy with gas is applied ; several traditional methods were applied for comparison. Charging of O 2 SiO 2 and could be reduced considerably in an environmental pressure of AE5 Γ‚ 10-8 Torr. Charging of ZrO 2 O 2 Al 2

O 3 could be compensated completely in this oxygen environment. It is shown that for the compensation of the electron beam e †ects, including electron-stimulated desorption and carbon contamination of the surface, an atmosphere O 2 of 5 Γ‚ 10-8 Torr is more efficient than using an auxiliary electron gun or low-energy positive ions. It is also more efficient than an Ar environment of 1 Γ‚ 10-4 Torr.

πŸ“œ SIMILAR VOLUMES

Charging Phenomena at the Metal Oxide–Li
Charging Phenomena at the Metal Oxide–Liquid Metal Interfaces and Determination of Excess Electron Density of Metal Oxide–Mercury Systems by the Induced emf Method
✍ Young Hyun Paik; Jang H. Pan; Wu J. Yoon πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 105 KB

Interfacial charge in a metal oxide-liquid metal system is mainly due to the electron transfer between two phases. Many metal oxides accompany electronic defects, such as quasi-free electrons or holes in their lattices. When those oxides are brought into contact with a liquid metal, electrons in the

Adsorption of Cationic and Anionic Surfa
Adsorption of Cationic and Anionic Surfactants on Metal Oxide Surfaces: Surface Charge Adjustment and Competition Effects
✍ Ellen M. Lee; Luuk K. Koopal πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 185 KB

## Introduction The adsorption of cationic and anionic surfactants on rutile is studied as a function of surfactant concentration and ionic In a series of papers Koopal and co-workers (1-6) have strength in solution. The pH is kept constant for each series of discussed surfactant adsorption on mi

Biocompatibility of amorphous silica nan
Biocompatibility of amorphous silica nanoparticles: Size and charge effect on vascular function, in vitro
✍ Naveed Akbar; Teba Mohamed; Debra Whitehead; May Azzawi πŸ“‚ Article πŸ“… 2011 πŸ› Portland Press 🌐 English βš– 459 KB πŸ‘ 1 views

## Abstract Synthetic amorphous silica is gaining popularity as the material of choice in the fabrication of nanoparticles for use in imaging diagnostics, medical therapeutics, and tissue engineering because of its biocompatible nature. However, recent evidence suggests that silica nanoparticles (S