scholarly journals Analysis of two-color laser-induced electron emission from a biased metal surface using an exact quantum mechanical solution

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
Yi Luo ◽  
Peng Zhang
Keyword(s):  
Metal Surface ◽  
Electron Emission ◽  
Quantum Mechanical ◽  
Exact Quantum ◽  
Quantum Mechanical Solution

Specific quantum mechanical solution of difference equation of hyperbolic type

2014 ◽  
Vol 19 (5) ◽  
pp. 1313-1328 ◽  
Author(s):  
Jovan P. Šetrajčić ◽  
Stevo K. Jaćimovski ◽  
Vjekoslav D. Sajfert ◽  
Igor J. Šetrajčić
Keyword(s):  
Difference Equation ◽  
Hyperbolic Type ◽  
Quantum Mechanical ◽  
Quantum Mechanical Solution ◽  
Specific Quantum

scholarly journals An investigation of the combustion of platinum

1929 ◽  
Vol 123 (791) ◽  
pp. 202-216 ◽  
Keyword(s):  
Metal Surface ◽  
Electron Emission ◽  
Reaction Rate ◽  
Surface Combustion ◽  
Reaction Velocity ◽  
Combustion Of Gases ◽  
Work Functions ◽  
Humphry Davy ◽  
Products Of Reaction ◽  
Low Pressures

The attack of metal surfaces by gases at low pressures under conditions suet that the products of reaction volatilise too rapidly to affect the reaction velocity is one of the simplest heterogeneous actions and presents many analogies to a simple catalytic action at a surface. Langmuir studied the rate of attack of tungsten by oxygen under these conditions and in this communication the interaction of platinum with oxygen is described. This element was chosen, not only on account of the importance of reactions involving the "clean up" of gases in contact with hot filaments, but also because the electron work functions of both tungsten and platinum are known, so that their relation ship to the reaction rate could be studied. That some connection may exist between the reactivity of a surface and the ease of electron emission has been suggested previously and is to be noted particularly in the investigations of Sir Humphry Davy on the oxidation on zinc and copper, of Langmuir, and of Thompson, Bone, Thomas, and Brine on the surface combustion of gases. From a somewhat different standpoint others, notably Brewer, and Finch and Stimson, suggest that surface reactions take place only after formation of ions on the surface has occurred, the former postulating that ions are formed by molecules entering the intrinsic field of the metal surface and react only after emergence from the field.

Electron emission induced by cluster impact on a clean metal surface

1994 ◽  
Vol 88 (1-2) ◽  
pp. 44-48 ◽  
Author(s):  
Kristine Töglhofer ◽  
Friedrich Aumayr ◽  
Hannes Kurz ◽  
Hannspeter Winter ◽  
Paul Scheier ◽  
...  
Keyword(s):  
Metal Surface ◽  
Electron Emission ◽  
Clean Metal Surface ◽  
Clean Metal

The Nature of an Adhesion Bond between Two High-Molecular Weight Compounds

1960 ◽  
Vol 33 (4) ◽  
pp. 1180-1187 ◽  
Author(s):  
L. P. Morozova ◽  
N. A. Krotova
Keyword(s):  
Polymer Film ◽  
Metal Surface ◽  
Double Layer ◽  
Electron Emission ◽  
Electric Double Layer ◽  
Diffusion Processes ◽  
Sharp Decrease ◽  
Work Of Adhesion ◽  
Adhesion Bond ◽  
Residual Charge

Abstract 1. The nature of the adhesion bonds in different cases can be determined by investigations of the mechanical characteristics of adhesion, of electrical effects observed on destruction of the bond, and microscopical investigation of the separation boundaries in various systems consisting of polymer pairs, and polymer-metal and polymer-glass systems held together by forces of adhesion. 2. The adhesion bonds between polymer and metal and polymer and glass are electrical in character, as shown by the form of the adhesiogram, the occurrence of electron emission on separation, and the existence of electric charges on the separated surfaces. 3. After separation, the polymer film continues to emit electrons and carries a negative residual charge. The substrate (glass, metal) does not emit electrons and has a positive charge. 4. The breakdown of the adhesion bond between two polar polymers of different structure, or a polar and nonpolar polymer, is accompanied by the same characteristic effects as the separation of a polymer from glass or metal. A sharp boundary is observed in microscopic specimens. 5. Determinations of the velocities of electrons emitted during separation show that breakdown of a firm adhesion bond is accompanied by emission of electrons with higher velocities than those emitted in the breakdown of a weak bond. These results arc in good agreement with the electrical theory of adhesion. 6. The reaction of the substrate (glass) has a strong influence on the adhesion of a polymer (chlorinated polyvinyl chloride) to it. The maximum adhesion is found in the neutral region. The detached polymer film shows a reversal of residual charge in the strongly acid and strongly alkaline regions, accompanied by a sharp decrease of the work of adhesion; this can only be attributed to a decrease of the surface electrification density of the layers of the electric double layer in the charge reversal region. 7. Mechanical treatment of the metal surface increases the adhesion of polymers to it and intensifies electron emission from the regions of the polymer film which were attached to the treated regions of the metal surface. 8. The formation of an adhesion bond between two nonpolar polymers of similar structure is caused by diffusion processes in the contact zone. In such cases no electrical effects are observed during separation, the boundary in microscopic specimens is diffuse, and the work of separation depends relatively little on the rate of separation. 9. The systems studied can be subdivided into two groups: the adhesion bond in systems of the first group is the result of formation of an electric double layer at the boundary; in systems of the second group the adhesion bond is produced by diffusion processes at the boundary.

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