Search results

The chemical structure of organic N719 and D149 dyes are shown in Figures 2(A) and 2(B), respectively.
Chemical structure of (A) N719 sensitised dye [10] (B) D149 sensitised dye [11].
This indicated the effect that the molecules and semiconductor structure have on charge transfer as it is a function of the radii and polarity index of the material and solvents.
Properties TiO2 Molecular weight [g/mol] 79.866 Dielectric constant 55 Mass density [g/cm3] 4.23 The density of state [Ns /cm3] 1.163×1025 Crystal structure Tetragonal rutile Refractive index 2.609 Lattice constant[Å] a = 4.5936, c =2.9587 Radius calculated[Å] 1.9561 Valance band [eV] 7.25 Conduction band energy[eV] 4.05 Energy gab eV 3.2 [eV] Melting point [oC] 1843[°C] Electron effective mass 1.25 Refractive index 2.5688 Electron concentration [1/cm3] 2×1020[cm-3] Electron affinity (eV) 4.2 Furthermore, The transition energy ΛAD(eV) of the N719/TiO2 and D149/TiO2 systems are calculated according to Equation 10 by using MATLAB with inserting values radii of N719 and D149, the distance between the molecules, and TiO2 R(m)=D+Dsem from Tables 1 and 2 and the refractive and dielectric constant of the solvents from Table 3.
[24] Sompit Wanwong, Weradesh Sangkhun and Jatuphorn Wootthikanokkhan : The effect of co-sensitization methods between N719 and boron dipyrromethene triads on dye-sensitized solar cellperformance, The Royal Society of Chemistry RSC Adv., (2018), 8, 9202–9210

., deposition temperature and rate), strain should be qualified as parameter playing crucial role in formation of the epitaxial film morphology and defect structure.
Hook's generalized law in the case of wurtzite films deposited on the basal plane A single crystal of a wurtzite structure is described by crystallographic hexagonal symmetry.
In terms of elastic properties, the epitaxial film with the described morphology should be considered as a single crystal rather than a polycrystalline structure.
For the hexagonal crystal system and in particular for the wurtzite structure the relationships between elastic compliances and elastic constants (stiffnesses) are given as follows (see e.g. [23]): ) 1 c c ( 2 1 1211 33 11 cc s − += , ) 1 c c ( 2 1 1211 33 12 cc s − −= (8) c c13 13 −=s , c c 1211 33 c s + = , 44 44 c1 s = (9) 213 121133 2)( ccccc −+≡ (10) where ijs and ijc (i, j = 1, 2, 3 or 4) are the compliances and elastic constants, respectively, and c is auxiliary notation.
It is reasonable to assume that oxygen prefers nitrogen sites since their chemistry and covalent atomic radii are rather close.

The hollow tubular structure of the kapok fibers also facilitates oil sorption through capillary action [2, 5, 6].
The SEM images in Fig. 2 show the morphology, including the structure and arrangement of the kapok fibers.
At higher magnification (2000x), it was clear that the raw and modified fibers (Fig. 2) show that even after the modification process, the hollow tubular structure of the fibers was maintained.
Similarly, this might be due to some coatings that potentially block the thin tube-like structure of the modified fiber even after post-washing.
Balela, Adsorption of anionic methyl orange dye and lead (II) heavy metal ion by polyaniline-kapok fiber nanocomposite, Materials Chemistry and Physics 243 (2020)

Moreover, subgrain structures are created by RE oxide dispersions that further enhance Cr or Al diffusion towards the surface [4, [] B.A.
Insights into the effect of RE on grain boundary transport in oxides may be gained from recent studies on the effect of RE's on Al2O3 grain boundary structures.
Furthermore, RE may affect the grain boundary transport behavior by affecting its structure.
Varying diffusivities have been shown with different grain boundary structures [[] D.M.
Since every RE has its limited solubility in an alloy, adding more than one type allows more RE to be incorporated. ii) Different RE's, with different chemistry, may interact with tramp elements differently, e.g., Y interacts more strongly with S while Hf with C [38]. iii) Different RE's may segregate at different types of grain boundaries due to their different ionic sizes; this of course, assumes that not all oxide grain boundaries are alike and that a RE may not segregate to every type of boundary.

This is because as Ge replaces Se, the chain structure of Se is reduced by the formation of Ge(Se1/2)4 three dimensional units, thereby increasing the rigidity of structure.
For the system Sb10Se90-xGex the variation in the compactness can be defined in terms of changes in the structure of the glass network as compared to the mean atomic volume.
Conclusion The structure of the chalcogenide glass system Sb10Se90-xGex becomes rigid as the Ge content is increased in binary system Sb10Se90 which may be attributed to larger degree of cross-linking in the glass on addition of Ge.
Sanderson, Inorganic Chemistry (Affiliated East-West Press PUT, New Delhi, 1971)

The tri-n-octylmethyl-ammonium methyl carbonate was synthesized via a high pressure process with tri-n-octylamine(tri-C8) and dimethyl carbonate(DMC) in the catalysis of tri-n-octylmethyl-ammonium bromine, and its chemical structure was confirmed using FTIR spectroscopic analysis.
The structure of the product was confirmed by IR.
[3] Massimo Fabris, Vittorio Lucchini, Marco Noe, Alvise Perosa and Maurizio Selva[a]: submitted to Chemistry.

γ phase and γ′ phase γ′ precipitate of an L12 structure based on Ni3Al in a γ matrix (fcc) is the strengthening phase in single crystal superalloys, which directly affects mechanical properties by its quantity, size and morphology as well as the site preference of alloying elements[33]. γ′ phase contains substantial amounts of Ti, Ta, W, Mo, Nb, Hf and high levers of Ni and Al.
In order to understand the effects of adding Ru, it is important to know the atomic sites occupied by Ru in the superalloy structure[57].
TCP phases TCP phases are a kind of intermetallic compound which are composed of transition elements with high coordination number of atoms and complicated crystal structure.
Frank–Kasper coordination polyhedra[77] Although the chemistries of the TCP phases are dependent upon the composition of the parent alloy, some common phases can be distinguished by their distinct crystallographic structures (Table 1).

Johnson1, c 1Department of Chemistry, University of Oregon, Eugene, Oregon 97403 USA 2Advance Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 USA aclay.d.mortensen@intel.com, bzschack@anl.gov, cdavej@uoregon.edu Keywords: diffusion barrier, synthesis, thermoelectric Abstract.
Introduction Over the past 30 years, nanostructured (A)x(B)y superlattices have allowed researchers to tune physical properties including magnetism and thermal conductivity and design new semiconductor structures with enhanced performance for applications.[1-4] Increasing the complexity by adding a third component in an (A)x(B)y(C)z pattern has resulted in exciting breakthroughs including increased polarization enhancement in ferroelectric materials, delta doping of semiconductors, high mobility semiconductor heterostructures, and tuning of optoelectronic properties not achievable with (A)x(B)y superlattices.[5-9] During the past 15 years, enhanced thermoelectric performance has been reported for nanostructured superlattices leading to high values for ZT.
The enhanced thermoelectric performance has resulted mainly from a reduction in the thermal conductivity rather than the theoretically predicted enhancement in the power factor.[10-12] Three component superlattice structures have been prepared with a variety of epitaxial growth techniques (atomic layer deposition, pulsed laser deposition, chemical vapor deposition, and molecular beam epitaxy) to sequentially deposit the three superlattice components, but it is frequently difficult to find suitable growth conditions.
The first step in preparing these designed precursors is to determine the deposition conditions required to deposit a bilayer of the constituent elements that has the correct composition and contains the quantity of atoms required to form a single crystallographic layer of the desired Te-Ti-Te trilayer and Te-Bi-Te-Bi-Te or Te-Sb-Te-Sb-Te 5-layer structures.
The microprobe data along with the formation of nanolaminates with systematic changes in their period that agree with the structure of the deposited precursors confirms that the calibration procedure was successful.

The performance of p-channel MOSFETs is heavily influenced by traps near the valence band, a characteristic that is challenging to predict using capacitance-voltage (CV) characteristics due to the extremely low inversion carrier concentration in MOS structures.
Notably, the interface trap density near the valence band in SiO2/SiC MOS structures is considerably higher compared to that near the conduction band [17].
Also, MOS capacitors provide a baseline for the interface quality for typical MOS structure.
Ghibaudo, “Temperature Dependence of Fowler-Nordheim Emission Tunneling Current in MOS Structures,” in ESSDERC ’94: 24th European Solid State Device Research Conference, Sep. 1994, pp. 507–510
Speight, Ed., Lange’s Handbook of Chemistry, 17th Edition.

To conduct any computer simulation of structure, engineers must be aware of the value of young modulus.
Miled., Effet de taille dans le béton léger de polystyrène expansé, Mémoire de thèse de Doctorat, Ecole Nationale des Ponts et Chaussées, Mécanique, Structures et Matériaux, p181 2005
Hansen, Strength Elasticity and creep as related to the internal structure of concrete.
In: Chemistry of cement, Proceedings of fourth international symposium, Monograph.Vol. 2, 709, 709–723, Washington, 1960
Nepper-Christansen, Observations on strength and fracture in lightweight and ordinary concrete-the Structure of concrete and its behavior under load, Proceedings of International Conference, Cement and Concrete Association. 93–108, London, 1965