Field Ion Microscope Observations of Cluster Formation in Metal Deposits on Tungsten Surfaces

simulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

Direct Imaging of Reconstructed Iridium Surfaces in the Field Ion Microscope

Experiments are described during which both the Ir(llO)lx2 and the Ir(1OO)lxS reconstructed surfaces could be imaged in the FIM. Furthermore evidence for a possible 1x2 reconstruction of the Ir(113) surface was found. Introduction It is well khown that on many semiconductor and some metal surfaces the topmost layer of atoms can rearrange to form structures different from those of the underlying...

fabrication of new ion sensitive field effect transistors (isfet) based on modification of junction-fet for analysis of hydronium, potassium and hydrazinium ions

a novel and ultra low cost isfet electrode and measurement system was designed for isfet application and detection of hydronium, hydrazinium and potassium ions. also, a measuring setup containing appropriate circuits, suitable analyzer (advantech board), de noise reduction elements, cooling system and pc was used for controlling the isfet electrode and various characteristic measurements. the t...

Scanning transmission ion microscope with a field ion source.

Experiments with a low-resolution scanning transmission ion microscope, using hydrogen ions from a field ionization source, indicate that it will be feasible by this approach to aim at high-resolution ion microscopy. Micrographs of unstained biological specimens have been obtained by critical range absorption of a 55 keV hydrogen ion beam at a resolution of 2000 A.

Wax Deposits on Leaf Surfaces.