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Correlation between structure, phonon spectra, thermal expansion, and thermomechanics of single-layer MoS2
Using first-principles simulation, the correlation between structure, phonon spectra, thermal expansion, and thermomechanics of single-layer MoS2 is established. The laminar structure results in the low-dimension ZA mode with a parabolic dispersion and negative Grüneisen constants (γ), while the nonorthogonal covalent…
Electrolytes for asymmetrical MnO2 supercapacitors
Cette thèse a pour but de caractériser le fonctionnement de supercondensateurs asymétriques composés de dioxyde de manganèse de structure birnessite et de carbone activé dans différents électrolytes. Les électrolytes aqueux neutres à base de sels inorganiques montrent les meilleures performances électrochimiques. La n…
Synthesis of glasses and glass-ceramics in the system SbPO4-PbO-ZnO doped with manganeses and iron
Universidade Federal de Minas Gerais
Theoretical study of defects in BN nanotubes
Boron nitride (BN) is a compound formed by covalent bonds between boron and nitrogen atoms. In the crystalline phase it can be found in different structures, such cubic (c-BN), simgle hexagonal (h-BN), wurtzite (w-BN) and rhombohedral (r- BN). Similarly to graphite h-BN can form two dimensional structures, which can b…
Development of an electron paramagnetic resonance system for a single nitrogen-vacancy center in diamond
A nitrogen?vacancy (NV) center is a paramagnetic impurity defect existing in the diamond. Because of its unique properties including long electron spin coherence time, photostability and ability to initialize and detect a single NV center, the NV center is a promising candidate for investigation of fundamental quantum…
Fabrication of polymer derived silica bonded alumina ceramics
Present work focuses on the polymer derived silica bonded alumina ceramics. Sintering has been done at 1500oC and 1600 oC. The alpha-alumina phase of (305 nm from ALMATIS&449 nm of TRL alumina) micron particle size has been used as starting material. Along with Polymethylsiloxane or puresilica is added with isopropyla…
Design experience: CRBRP radiation shielding
The Clinch River Breeder Reactor Plant (CRBRP) is being designed as a fast breeder demonstration project in the U.S. Liquid Metal Fast Breeder Reactor (LMFBR) program. Radiation shielding design of the facility consists of a comprehensive design approach to assure compliance with design and government regulatory requi…
Chemically and optically programmable soft matter : DNA compaction, protein activity and microfluidic operations
Cette thèse porte sur le développement de matière molle programmable, de nature synthétique ou biologique, afin d'obtenir des systèmes physico-chimiques (ADN, protéines, petits volumes de liquides...) permettant de nouvelles propriétés contrôlables par la lumière. Dans un premier temps, nous développons une nouvelle f…
Effect of surface integrity on the fatigue life of a bainitic steel after finishing milling
L’objet de cette thèse est la prise en compte des effets du fraisage de finition dans un modèle d’endommagement en fatigue. Les procédés d’usinage tels que le fraisage sont connus pour imposer de fortes sollicitations thermomécaniques, pouvant altérer les propriétés géométriques (rugosité, arrachements) et mécaniques…
Influence of Deposition Temperature on Nanocrystalline CdS Thin Films: Application in Solar Cells as Antireflection Coatings
Nanocrystalline CdS thin films were successfully prepared using simple chemical bath deposition technique. Cadmium sulphate, thiourea and deionised water were used as starting precursor solution. The prepared thin films were characterized using X-ray diffractogram (XRD), Scanning electron microscope (SEM), elemental c…
Nanocrystalline Hexagonal Shaped CdS Thin Films for Photoconducting Application
Nanocrystalline thin films of cadmium sulphide were prepared by chemical bath deposition technique onto glass substrate at 60 °C. The deposition parameters were optimized to obtain good quality of nanocrystalline thin films such as, time, precursor concentration, temperature of deposition and pH of the solution. The s…
A boundary control problem for the viscous Cahn-Hilliard equation with\n dynamic boundary conditions
A boundary control problem for the viscous Cahn-Hilliard equations with\npossibly singular potentials and dynamic boundary conditions is studied and\nfirst order necessary conditions for optimality are proved.\n Key words: Cahn-Hilliard equation, dynamic boundary conditions, phase\nseparation, singular potentials, opt…
Deposition of semiconductive films in SF6 ion-ion plasma
International audience
- Epoxy Nanocomposite Based on Carbon Nanotubes for Electromagnetic Interface Shielding
The way the graphene sheet is rolled determines the electronic properties of the tube. In fact, it is possible to have two types of electric behavior of CNTs-metallic or semiconductor-due to the different electronic structures of the tube itself. It is determined by chirality vector Ch and 1D translation vector Τ of t…
Synthesis and Photophysics of a Red‐Light Absorbing Supramolecular Chromophore System
Abstract Invited for the cover of this issue is the group of Romano V. A. Orru and Koop Lammertsma at the VU University of Amsterdam. The image depicts the photoexcitation of the aromatic core of a red‐light absorbing supramolecular chromophore system. Read the full text of the article at 10.1002/chem.201402398 .
Pentherichthys atratus : Knudsen, S.
Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species.
10.1063/1.4889816.2
Electromigration driven void motion is studied in Ag wires with an initially well-defined single crystal lattice by in situ scanning electron microscopy. Voids are moving in opposite direction to the electron flow. When the electron current is reversed, voids exactly retrace their previous motion path with an increase…
Scorpaena annobonae: Russell, B., Poss, S., Nunoo, F. & Bannerman, P.
Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species.
10.1063/1.4889816.1
Electromigration driven void motion is studied in Ag wires with an initially well-defined single crystal lattice by in situ scanning electron microscopy. Voids are moving in opposite direction to the electron flow. When the electron current is reversed, voids exactly retrace their previous motion path with an increase…