Theory, electronic structure and physical chemistry of materials cathodes for microwave devices

2020 ◽  
Author(s):  
Vladimir Kapustin ◽  
Illarion Li
Keyword(s):  
Physical Chemistry ◽  
Electronic Structure ◽  
Kinetic Theory ◽  
Cathode Materials ◽  
Analytical Methods ◽  
Electronic Materials ◽  
Electronic Devices ◽  
Cold Start ◽  
Emission Properties ◽  
Oxide Phases

In the monograph the kinetic theory of cathode materials based on metal and oxide phases, analytical methods of research of the cathodes, methods of study of their emission properties. Details the authors discuss the theory and physico-chemistry of oxide-Nickel, metalloplastic, and metal alloyed oxide-yttrium cathodes, including a cathode for magnetrons with cold start. Designed for scientific and engineering-technical workers, specializing in electronic materials and electronic devices.

Effect of Microimpurities on the Electronic Structure and Emission Properties of Microwave Device Cathode Materials

2019 ◽  
Vol 10 (5) ◽  
pp. 1065-1071
Author(s):  
V. I. Kapustin ◽  
I. P. Li ◽  
A. V. Shumanov ◽  
S. O. Moskalenko ◽  
V. I. Svitov
Keyword(s):  
Electronic Structure ◽  
Cathode Materials ◽  
Microwave Device ◽  
Emission Properties

Effect of micro-impurities on the electronic structure and emission properties of the microwave devices cathode materials

2019 ◽  
pp. 19-29
Author(s):  
Kapustin V. I. ◽  
◽  
Li I. P. ◽  
Shumanov A. V. ◽  
Moskalenko S. O. ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Cathode Materials ◽  
Microwave Devices ◽  
Emission Properties

Failure Analysis and Defect Inspection of Electronic Devices by High-Resolution Cathodoluminescence

2017 ◽  
Author(s):  
C. Monachon ◽  
M.S. Zielinski ◽  
D. Gachet ◽  
S. Sonderegger ◽  
S. Muckenhirn ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Electronic Materials ◽  
Electronic Devices ◽  
Optical Emission ◽  
Large Field ◽  
Nanometer Scale ◽  
Defect Analysis ◽  
Defect Inspection ◽  
Spectrally Resolved ◽  
Non Destructive

Abstract Quantitative cathodoluminescence (CL) microscopy is a new optical spectroscopy technique that measures electron beam-induced optical emission over large field of view with a spatial resolution close to that of a scanning electron microscope (SEM). Correlation of surface morphology (SE contrast) with spectrally resolved and highly material composition sensitive CL emission opens a new pathway in non-destructive failure and defect analysis at the nanometer scale. Here we present application of a modern CL microscope in defect and homogeneity metrology, as well as failure analysis in semiconducting electronic materials

scholarly journals Biodegradation of bio-sourced and synthetic organic electronic materials towards green organic electronics

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Eduardo Di Mauro ◽  
Denis Rho ◽  
Clara Santato
Keyword(s):  
Organic Electronics ◽  
Electronic Materials ◽  
Chemical Elements ◽  
Electronic Devices ◽  
Polyphenylene Sulfide ◽  
Environmentally Benign ◽  
Organic Electronic ◽  
Synthetic Materials ◽  
Organic Electronic Materials ◽  
Thermophilic Conditions

AbstractUbiquitous use of electronic devices has led to an unprecedented increase in related waste as well as the worldwide depletion of reserves of key chemical elements required in their manufacturing. The use of biodegradable and abundant organic (carbon-based) electronic materials can contribute to alleviate the environmental impact of the electronic industry. The pigment eumelanin is a bio-sourced candidate for environmentally benign (green) organic electronics. The biodegradation of eumelanin extracted from cuttlefish ink is studied both at 25 °C (mesophilic conditions) and 58 °C (thermophilic conditions) following ASTM D5338 and comparatively evaluated with the biodegradation of two synthetic organic electronic materials, namely copper (II) phthalocyanine (Cu–Pc) and polyphenylene sulfide (PPS). Eumelanin biodegradation reaches 4.1% (25 °C) in 97 days and 37% (58 °C) in 98 days, and residual material is found to be without phytotoxic effects. The two synthetic materials, Cu–Pc and PPS, do not biodegrade; Cu–Pc brings about the inhibition of microbial respiration in the compost. PPS appears to be potentially phytotoxic. Finally, some considerations regarding the biodegradation test as well as the disambiguation of “biodegradability” and “bioresorbability” are highlighted.

Electronic Structure and Field‐Emission Properties of Nitrogen‐Doped Carbon Nanotubes

2006 ◽  
Vol 14 (2-3) ◽  
pp. 151-164 ◽  
Author(s):  
A. V. Okotrub ◽  
L. G. Bulusheva ◽  
V. V. Belavin ◽  
A. G. Kudashov ◽  
A. V. Gusel'nikov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Field Emission ◽  
Emission Properties ◽  
Nitrogen Doped ◽  
Field Emission Properties ◽  
Nitrogen Doped Carbon

Synthesis of bright red-emissive dicyanoetheno-bridged hexa-peri-hexabenzocoronene dimers

2017 ◽  
Vol 15 (6) ◽  
pp. 1426-1434 ◽  
Author(s):  
Kazuma Oda ◽  
Satoru Hiroto ◽  
Ichiro Hisaki ◽  
Hiroshi Shinokubo
Keyword(s):  
Electronic Structure ◽  
Emission Properties ◽  
Large Perturbation

The introduction of a dicyanomethyl anion group to hexa-peri-hexabenzocoronene (HBC) substantially enhanced the emission properties of HBC due to a large perturbation of its electronic structure.

How Small Is Too Small ? Understanding The Electronic Structure Of Atomic-Scale Transistors

1999 ◽  
Vol 5 (S2) ◽  
pp. 120-121
Author(s):  
D. A. Muller ◽  
T. Sorsch ◽  
S. Moccio ◽  
F. H. Baumann ◽  
K. Evans-Lutterodt ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Electrical Properties ◽  
Thermal Oxidation ◽  
Electronic Devices ◽  
Local Environment ◽  
Gate Oxide ◽  
Atomic Scale ◽  
Gate Oxides ◽  
Bulk Properties ◽  
Commercial Use

The transistors planned for commercial use ten years from now in many electronic devices will have gate lengths shorter than 130 atoms, gate oxides thinner than 1.2 nm of SiO2 and clock speeds in excess of 10 GHz. It is now technologically possible to produce such transistors with gate oxides only 5 silicon atoms thick[l]. Since at least two of those 5 atoms are not in a local environment similar to either bulk Si or bulk SiO2, the properties of the interface are responsible for a significant fraction of the “bulk” properties of the gate oxide. However the physical (and especially their electrical) properties of the interfacial atoms are very different from .bulk Si or bulk SiO2. Further, roughness on an atomic scale can alter the leakage current by orders of magnitude.In our studies of such devices, we found that thermal oxidation tends to produce Si/SiO2 interfaces with 0.1-0.2 nm rms roughness.

scholarly journals Pyramidal Heteroanion-Directed and Reduced MoV-Driven Assembly of Multi-Layered Polyoxometalate Cages

2018 ◽  
Author(s):  
Qi Zheng, ◽  
Manuel Kupper ◽  
Weimin Xuan ◽  
Hirofumi Oki ◽  
Ryo Tsunashima ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electronic Materials ◽  
Electronic Devices ◽  
Mixed Valence ◽  
The Self ◽  
Model Structure ◽  
Redox Titration ◽  
Metal Centers ◽  
Redox Active ◽  
Tetrabutyl Ammonium

The fabrication of redox-active polyoxometalates (POMs) that can switch between multiple states is critical for their application in electronic devices, yet, a sophisticated synthetic methodology is not well developed for such cluster types. Here we describe the heteroanion-directed and reduction-driven assembly of a series of multi-layered POM cages 1-10 templated by 1-3 redox-active pyramidal heteroanions. The heteroanions greatly affect the selfassembly of the resultant POM cages, leading to the generation of unprecedented three-layered peanut-shaped - 4, 7 and 8 - or bulletshaped - 5 and 6 - structures. The introduction of reduced molybdate is essential for the self-assembly of the compounds and results in mixed-metal (W/Mo), and mixed-valence (WVI/MoV) 1-10, as confirmed by redox titration, UV-Vis-NIR, NMR spectroscopy and mass spectrometry. 11, the tetrabutyl ammonium (TBA) salt derivative of the fully oxidized 3, is produced as a model structure for measurements to confirm that 1-10 are a statistical mixture of isostructural clusters with different ratios of W/Mo. Finally, multilayered POM cages exhibit dipole relaxations due to the presence of mixed valence WVI/MoV metal centers, demonstrating their potential uses for electronic materials.

The Historical Background: Molecular Theory as of 1900

2020 ◽  
pp. 33-87
Author(s):  
George E. Smith ◽  
Raghav Seth
Keyword(s):  
Physical Chemistry ◽  
Nineteenth Century ◽  
Kinetic Theory ◽  
Historical Context ◽  
Molecular Theory ◽  
Historical Background ◽  
Kinetic Theory Of Gases ◽  
Comprehensive Review ◽  
Molecular Kinetic Theory ◽  
Wilhelm Ostwald

The task of this chapter is to explain the sense in which molecular theory—both molecular-kinetic theory and chemical-molecular theory—were still viewed as hypotheses as of 1900 and why the evidence bearing on them during the second half of the nineteenth century was insufficient for them to have achieved standing beyond this. The chapter reviews the strengths and limitations of the evidence in question, taking advantage of two widely read textbooks in physical chemistry published in the 1890s by Wilhelm Ostwald and Walther Nernst and a uniquely comprehensive review of the evidence pertaining to the kinetic theory of gases, by O. E. Meyer, published in 1899. This background defines the historical context within physics and chemistry for the developments covered in the remainder of the monograph.

Explosive Emission Properties of Cathode Materials in Relativistic Electron Beam Generation

2014 ◽  
Vol 42 (11) ◽  
pp. 3491-3497 ◽  
Author(s):  
Romesh Chandra ◽  
Amitava Roy ◽  
Senthil Kalyanasundaram ◽  
Ankur S. Patel ◽  
Vishnu Kumar Sharma ◽  
...  
Keyword(s):  
Electron Beam ◽  
Relativistic Electron ◽  
Cathode Materials ◽  
Relativistic Electron Beam ◽  
Explosive Emission ◽  
Emission Properties ◽  
Electron Beam Generation ◽  
Beam Generation
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