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Full-Text Articles in Physical Sciences and Mathematics
Electron Beam Effects In The Analysis Of Compound Semiconductors And Devices, Nancy Burnham, Ll Kazmerski, Ab Swartzlander, Aj Nelson, Se Asher
Electron Beam Effects In The Analysis Of Compound Semiconductors And Devices, Nancy Burnham, Ll Kazmerski, Ab Swartzlander, Aj Nelson, Se Asher
Nancy A. Burnham
The effects of electron beams on the analysis of CuInSe2surfaces are examined in this paper. Potential changes in the surface chemistry—including oxidation and desorption—under a range of incident probe conditions, are investigated for possible artifactual information generation. Emphasis is placed on the relationships between beam conditions and oxygen chemisorption and physisorption, since oxygen treatments of devices utilizing this semiconductor are critical to performance. Single crystals and polycrystalline thin films are analyzed and compared to establish the beam‐induced phenomena.
Electrochemical Reduction Of 1,1,4,4-Tetraphenylbutatriene, Tsu-Yu Chen, Mark Anderson, Dennis Peters
Electrochemical Reduction Of 1,1,4,4-Tetraphenylbutatriene, Tsu-Yu Chen, Mark Anderson, Dennis Peters
Mark R. Anderson
Polarograms and cyclic voltammograms for reduction of 1,1,4,4-tetraphenylbutatriene at mercury electrodes in dimethylformamide containing tetra-n-butylammonium perchlorate exhibit four waves; the first and second waves are due to stepwise formation of the radical anion and dianion of the starting material, whereas the third and fourth waves are attributable to reduction of 1,1,4,4-tetraphenyl-1,2-butadiene and 1,1,4,4-tetraphenyl-1-butene, respectively. Electrolysis of 1,1,4,4-tetraphenylbutatriene at potentials corresponding to the second wave yields 1,1,4,4-tetraphenyl-1,3-butadiene exclusively; at a slightly more negative potential, the latter undergoes reduction to 1,1,4,4-tetraphenyl-1-butene. When 1,1,4,4-tetraphenylbutatriene is electrolyzed in the presence of glacial acetic acid and at any potential on the first or second wave, …
Electrochemical Reduction Of Phenylpropadiene At Mercury Cathodes In Dimethylformamide: Isomerization Of The Allene To 1-Phenyl-1-Propyne, Tsu-Yu Chen, Mark Anderson, Steven Grossman, Dennis Peters
Electrochemical Reduction Of Phenylpropadiene At Mercury Cathodes In Dimethylformamide: Isomerization Of The Allene To 1-Phenyl-1-Propyne, Tsu-Yu Chen, Mark Anderson, Steven Grossman, Dennis Peters
Mark R. Anderson
Polarograms and cyclic voltammograms exhibit two waves for reduction of phenylpropadiene at a mercury electrode in dimethylformamide containing tetra-n-butylammonium perchlorate, the f i t wave signals reduction of phenylpropadiene to 1-phenyl-1-propene and the second wave is attributable to reduction of 1-phenyl-1-propene to 1-phenylpropane. However, the fmt wave is abnormally small because phenylpropadiene undergoes substantial rearrangement to 1-phenyl-1-propyne, which is reducible to 1-phenylpropane at nearly the same potential as 1-phenyl-1-propene. Controlled-potential electrolyses of phenylpropadiene, 1-phenyl-1-propene, and 1-phenyl-1-propyne at mercury pool cathodes have verified the processes elucidated by means of polarography and cyclic voltammetry. In the presence of diethyl malonate (a proton …
Global Existence Of Nonoscillatory Solutions Of Perturbed General Disconjugate Equations, William F. Trench, T. Kusano
Global Existence Of Nonoscillatory Solutions Of Perturbed General Disconjugate Equations, William F. Trench, T. Kusano
William F. Trench
No abstract provided.
Existence And Nonoscillation Theorems For An Emden-Fowler Equation With Deviating Argument, William F. Trench
Existence And Nonoscillation Theorems For An Emden-Fowler Equation With Deviating Argument, William F. Trench
William F. Trench
No abstract provided.