Significance of grain boundaries for transport phenomena in
... II Adsorption of metal atoms at a buckled graphene grain boundary using ...
... II Adsorption of metal atoms at a buckled graphene grain boundary using ...
Effect of Zn(NO3)2 filler on the dielectric permittivity and electrical
... composite materials. Figure 5a and b shows the frequencydependent dielectric behaviour of real and imaginary part of the permittivity (dielectric constant and dielectric loss) of the as-prepared PMMA–Zn(NO3 )2 composite in the temperature range 303–353 K. Dielectric constant is a function of capacit ...
... composite materials. Figure 5a and b shows the frequencydependent dielectric behaviour of real and imaginary part of the permittivity (dielectric constant and dielectric loss) of the as-prepared PMMA–Zn(NO3 )2 composite in the temperature range 303–353 K. Dielectric constant is a function of capacit ...
Essay code B3
... include electrostatic reduction, thermo reduction and photo catalytic reduction. The physical properties of Graphene is very significant because of its better conductivity and stability. The carbon-carbon bond length in graphene is 0.142 nanometers. Even though graphene is strong and stable, the sta ...
... include electrostatic reduction, thermo reduction and photo catalytic reduction. The physical properties of Graphene is very significant because of its better conductivity and stability. The carbon-carbon bond length in graphene is 0.142 nanometers. Even though graphene is strong and stable, the sta ...
The Luminescent Properties of Yttrium Oxyapatite Doped
... Fig. 3b shows the fluorescence decay curves of the 5D0 emitting level obtained when the sample was excitated at 590 nm (λem = 613 nm). The fluorescence decay profiles can be adjusted by a single-exponential function in the longer times, while a non-exponential part is observed for the shorter time. ...
... Fig. 3b shows the fluorescence decay curves of the 5D0 emitting level obtained when the sample was excitated at 590 nm (λem = 613 nm). The fluorescence decay profiles can be adjusted by a single-exponential function in the longer times, while a non-exponential part is observed for the shorter time. ...
Preparation of multifunctional coating materials and their
... in close collaboration with Finnish industry and it is divided into three application areas: (i) transparent electric conductors, namely antimony-doped tin dioxides, (ii) mechanically tolerant laser protective eyewear, and (iii) materials for micro-optical applications. ...
... in close collaboration with Finnish industry and it is divided into three application areas: (i) transparent electric conductors, namely antimony-doped tin dioxides, (ii) mechanically tolerant laser protective eyewear, and (iii) materials for micro-optical applications. ...
Synthesis and Computational Studies of a New Class of Lanthanide
... This chapter discusses the relevance of new solid-state materials for optimizing current green energy applications. The structure and properties of these emerging solids are introduced and the major directions of research in this field are identified. Introduction Understanding electron transfer in ...
... This chapter discusses the relevance of new solid-state materials for optimizing current green energy applications. The structure and properties of these emerging solids are introduced and the major directions of research in this field are identified. Introduction Understanding electron transfer in ...
Mössbauer Spectrometry
... structural properties within materials. A Mössbauer spectrum is an intensity of γ-ray absorption versus energy for a specific resonant nucleus such as 57Fe or 119Sn. Mössbauer spectrometry looks at materials from the “inside out,” where “inside” refers to the resonant nucleus. For one nucleus to emi ...
... structural properties within materials. A Mössbauer spectrum is an intensity of γ-ray absorption versus energy for a specific resonant nucleus such as 57Fe or 119Sn. Mössbauer spectrometry looks at materials from the “inside out,” where “inside” refers to the resonant nucleus. For one nucleus to emi ...
as PDF
... framework. The rhombohedral starting material retained modest capacity at lower current densities even after 80 cycles whereas the monoclinic Fe2(SO4)3 showed a faster capacity fade (Okada et al, unpublished results). The overall performance of the hexagonal phase was shown to be superior to the mon ...
... framework. The rhombohedral starting material retained modest capacity at lower current densities even after 80 cycles whereas the monoclinic Fe2(SO4)3 showed a faster capacity fade (Okada et al, unpublished results). The overall performance of the hexagonal phase was shown to be superior to the mon ...
First-Principles Studies of Surface Phonons and Electronic
... energy loss spectroscopy. It has been questioned whether this resonance is an experimental artifact or due to a force constant anomaly in the surface. The longitudinal phonon resonance is ascribed to a hybridization between a first-layer longitudinal (L) mode and a strong second-layer shear-vertical ...
... energy loss spectroscopy. It has been questioned whether this resonance is an experimental artifact or due to a force constant anomaly in the surface. The longitudinal phonon resonance is ascribed to a hybridization between a first-layer longitudinal (L) mode and a strong second-layer shear-vertical ...
182.pdf
... the optical spectra in the high energy region due to the possible enhancement of nonlinear optical and emission characteristics of the active species embedded in the photonic crystals. This is due to the presence of the flat or low dispersion bands in the energy regions where the group velocity is v ...
... the optical spectra in the high energy region due to the possible enhancement of nonlinear optical and emission characteristics of the active species embedded in the photonic crystals. This is due to the presence of the flat or low dispersion bands in the energy regions where the group velocity is v ...
paper
... the interface because of the strong interaction between the molecules in each phase. Polythiophene and C60 attract each other, but the steric effect between the side chain of polythiophene and C60 prevents direct contact between the polythiophene ring and C60. Such a scenario is not affected by the ...
... the interface because of the strong interaction between the molecules in each phase. Polythiophene and C60 attract each other, but the steric effect between the side chain of polythiophene and C60 prevents direct contact between the polythiophene ring and C60. Such a scenario is not affected by the ...
Optical Distinctions Between Weyl Semimetal TaAs and Dirac
... unusual band structure in the bulk and on the surface. The bulk conduction and valence bands of a topological semimetal touch linearly at pairs of discrete points (the Weyl points), through which the bands disperse linearly along all the three momentum directions. Topological semimetals exhibit a va ...
... unusual band structure in the bulk and on the surface. The bulk conduction and valence bands of a topological semimetal touch linearly at pairs of discrete points (the Weyl points), through which the bands disperse linearly along all the three momentum directions. Topological semimetals exhibit a va ...
HYDROTHERMAL SYNTHESIS AND CHARACTERIZATION OF
... that would not permit me to get confused my path, a dazzling brilliance which would allow me to put my very existence in a definitive manner; in spite of the solidity of the medium, the opacity that would tolerate free-roaming; all would grant me a portion of the joy while making me a part of a visu ...
... that would not permit me to get confused my path, a dazzling brilliance which would allow me to put my very existence in a definitive manner; in spite of the solidity of the medium, the opacity that would tolerate free-roaming; all would grant me a portion of the joy while making me a part of a visu ...
Tunnelling ionization of deep centres in high
... materials and have therefore become a focus of extensive investigation [11–17]. Deep centres usually determine the nonequilibrium carrier lifetimes by acting as centres of nonradiative recombination and thermal ionization. The effect of an electric field on thermal ionization and carrier trapping ha ...
... materials and have therefore become a focus of extensive investigation [11–17]. Deep centres usually determine the nonequilibrium carrier lifetimes by acting as centres of nonradiative recombination and thermal ionization. The effect of an electric field on thermal ionization and carrier trapping ha ...
Manipulation of powder characteristics by interactions at the solid
... (control), solvent treated and recrystallized SD samples. Control SD crystals are tabular with rough edges and surface irregularities. Treating SD with 5% ammonia solution did not appreciably affect the crystal shape. A slight decrease in surface roughness and edge sharpness can be observed. This ma ...
... (control), solvent treated and recrystallized SD samples. Control SD crystals are tabular with rough edges and surface irregularities. Treating SD with 5% ammonia solution did not appreciably affect the crystal shape. A slight decrease in surface roughness and edge sharpness can be observed. This ma ...
Investigation into high efficiency visible light photocatalysts for water
... viewed as one of the most exciting and environmentally friendly ways of producing clean renewable fuels such as hydrogen from abundant resources. Currently, there are many diverse semiconductors that have been developed, the majority for half reactions in the presence of sacrificial reagents. Howeve ...
... viewed as one of the most exciting and environmentally friendly ways of producing clean renewable fuels such as hydrogen from abundant resources. Currently, there are many diverse semiconductors that have been developed, the majority for half reactions in the presence of sacrificial reagents. Howeve ...
www.rsc.org/materials
... treated as a kind of force majeure exerted by F upon all atomic partners in its vicinity. F has a voracious appetite for grabbing electrons from other atoms: first of all the demands of F must be satisfied to the fullest, with the miserable scraps being left for partitioning among the remaining elem ...
... treated as a kind of force majeure exerted by F upon all atomic partners in its vicinity. F has a voracious appetite for grabbing electrons from other atoms: first of all the demands of F must be satisfied to the fullest, with the miserable scraps being left for partitioning among the remaining elem ...
Get cached
... received his doctorate there in 1986, having worked with Martin Jansen on alkali metal ozonides. After a postdoctoral year with Albrecht Rabenau at the Μ ax-Planck-Institut für Festkörperforschung in Stuttgart he moved to the Universität Bonn. His habilitation in the field of inorganic chemistry was ...
... received his doctorate there in 1986, having worked with Martin Jansen on alkali metal ozonides. After a postdoctoral year with Albrecht Rabenau at the Μ ax-Planck-Institut für Festkörperforschung in Stuttgart he moved to the Universität Bonn. His habilitation in the field of inorganic chemistry was ...
I Ceramic Material Classes - Wiley-VCH
... The method usually comprises the injection of a suitable gaseous, or liquid aluminum-containing precursor into the source of intensive heat (e.g., laser [2], d.c. arc plasma [3–5], or acetylene, methane, or hydrogen flame [6, 7]), where the precursor decomposes and converts into the oxide. In most ca ...
... The method usually comprises the injection of a suitable gaseous, or liquid aluminum-containing precursor into the source of intensive heat (e.g., laser [2], d.c. arc plasma [3–5], or acetylene, methane, or hydrogen flame [6, 7]), where the precursor decomposes and converts into the oxide. In most ca ...
Insulator charging by contact with metals
... There are, however, divergences of opinion whether the electrons are transferred only to the surface or if they penetrate into the bulk of the insulator. The surface trap theory (Bauser et. al. (1970)) and the penetration theory (Davies (1967 a)) are indistinguishable in the sense that they both cor ...
... There are, however, divergences of opinion whether the electrons are transferred only to the surface or if they penetrate into the bulk of the insulator. The surface trap theory (Bauser et. al. (1970)) and the penetration theory (Davies (1967 a)) are indistinguishable in the sense that they both cor ...
- JSAP Journals
... Carbon is known as one of the major impurities in tungsten, and carbon atoms have been reported to segregate on the surface at high temperature [11, 22, 23]. Additionally, the surface-segregated carbon layer is also known to be removable by annealing in oxygen [12, 24]. The tungsten moderator (99.95 ...
... Carbon is known as one of the major impurities in tungsten, and carbon atoms have been reported to segregate on the surface at high temperature [11, 22, 23]. Additionally, the surface-segregated carbon layer is also known to be removable by annealing in oxygen [12, 24]. The tungsten moderator (99.95 ...
Stannides and Intermetallic Tin Compounds
... lowed by heating to 120 – 200 ◦C for 10 min. The correct structures of these stannides, however, have later been determined from crystals grown under conventional synthesis conditions [18]. In the large field of catalysis, stannides are often required as thin films on ceramic supports. Such films ca ...
... lowed by heating to 120 – 200 ◦C for 10 min. The correct structures of these stannides, however, have later been determined from crystals grown under conventional synthesis conditions [18]. In the large field of catalysis, stannides are often required as thin films on ceramic supports. Such films ca ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
... The research realms of fabrication and application of nanomaterials have attracted more scientists and engineering from various disciplines in the recent years. Nanomaterials often have novel properties which are yet to be investigated. On the other hand, our knowledge of nanoscale chemical processe ...
... The research realms of fabrication and application of nanomaterials have attracted more scientists and engineering from various disciplines in the recent years. Nanomaterials often have novel properties which are yet to be investigated. On the other hand, our knowledge of nanoscale chemical processe ...
On the design of advanced metal oxide nanomaterials Lionel
... the most common, most diverse, and probably the richest class of materials in terms of physical, chemical, and structural properties. They include optical, optoelectronic, magnetic, electrical, thermal, electrochemical, photoelectrochemical, mechanical, and catalytic properties. Such diversity origi ...
... the most common, most diverse, and probably the richest class of materials in terms of physical, chemical, and structural properties. They include optical, optoelectronic, magnetic, electrical, thermal, electrochemical, photoelectrochemical, mechanical, and catalytic properties. Such diversity origi ...
growth and characterization of methyl orange doped kap
... dye doped KAP crystals was reported by J.B. Benedict et al19. Following the work stunning tricoloured crystals with three distinct regions of green, yellow and orange luminescence were deposited in the solutions of KAP that contained a dye “Proflavin”20. It was reported that the dye serves as a fluo ...
... dye doped KAP crystals was reported by J.B. Benedict et al19. Following the work stunning tricoloured crystals with three distinct regions of green, yellow and orange luminescence were deposited in the solutions of KAP that contained a dye “Proflavin”20. It was reported that the dye serves as a fluo ...
Semiconductor
A semiconductor material has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Semiconductors are the foundation of modern electronics. Semiconducting materials exist in two types - elemental materials and compound materials. The modern understanding of the properties of a semiconductor relies on quantum physics to explain the movement of electrons and holes in a crystal lattice. The unique arrangement of the crystal lattice makes silicon and germanium the most commonly used elements in the preparation of semiconducting materials. An increased knowledge of semiconductor materials and fabrication processes has made possible continuing increases in the complexity and speed of microprocessors and memory devices. Some of the information on this page may be outdated within a year because new discoveries are made in the field frequently.The electrical conductivity of a semiconductor material increases with increasing temperature, which is behaviour opposite to that of a metal. Semiconductor devices can display a range of useful properties such as passing current more easily in one direction than the other, showing variable resistance, and sensitivity to light or heat. Because the electrical properties of a semiconductor material can be modified by controlled addition of impurities, or by the application of electrical fields or light, devices made from semiconductors can be used for amplification, switching, and energy conversion.Current conduction in a semiconductor occurs through the movement of free electrons and ""holes"", collectively known as charge carriers. Adding impurity atoms to a semiconducting material, known as ""doping"", greatly increases the number of charge carriers within it. When a doped semiconductor contains mostly free holes it is called ""p-type"", and when it contains mostly free electrons it is known as ""n-type"". The semiconductor materials used in electronic devices are doped under precise conditions to control the concentration and regions of p- and n-type dopants. A single semiconductor crystal can have many p- and n-type regions; the p–n junctions between these regions are responsible for the useful electronic behaviour.Some of the properties of semiconductor materials were observed throughout the mid 19th and first decades of the 20th century. Development of quantum physics in turn allowed the development of the transistor in 1947. Although some pure elements and many compounds display semiconductor properties, silicon, germanium, and compounds of gallium are the most widely used in electronic devices. Elements near the so-called ""metalloid staircase"", where the metalloids are located on the periodic table, are usually used as semiconductors.The nickname of the southern area of Northern California is Silicon Valley because of all the influential tech companies that have their headquarters there. An integral part of today’s technology is built upon semiconductors, which are made primarily of silicon. Some major companies include Marvell Technology Group, National Semiconductor (now part of Texas Instruments), and Advanced Micro Devices.