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Online since: January 2009
Authors: Xue Qing Xu, Yu Zhang, G. Xu
The TG-DSC and X-ray diffraction analysis revealed that
the organic ligands also had effect on the crystallization temperature and crystal structures of the thin
films.
The crystalline structures of the thin films were determined on a Rigaku D/max-IIIA X-ray diffractometer with a CuKα radiation.
It was indicated that the thin film was polycrystalline and retained the cubic bixbyite structure.
This implies that Sn atoms incorporation in In2O3 lattice has not affected the lattice structure of In2O3.
Du, in: Inorganic chemistry, High Education Publisher (1983) [8] Radhouane Bel Hadj Tahar,Takayuki Ban, et al: J.
The crystalline structures of the thin films were determined on a Rigaku D/max-IIIA X-ray diffractometer with a CuKα radiation.
It was indicated that the thin film was polycrystalline and retained the cubic bixbyite structure.
This implies that Sn atoms incorporation in In2O3 lattice has not affected the lattice structure of In2O3.
Du, in: Inorganic chemistry, High Education Publisher (1983) [8] Radhouane Bel Hadj Tahar,Takayuki Ban, et al: J.
Online since: April 2016
Authors: Jin Fen Niu, Chao Peng, Jun Xia Li, Bing Hua Yao
Preparation and Characterization of Conjugated Microspheres FeTCPP-SSA-TiO2
Chao Penga, Bing-Hua Yaob, Jun-xia Lic and Jin-fen Niud
Department of Applied Chemistry, Xi'an University of Technology.
The morphology and structure of the photocatalyst was characterized.
The patterns indicated that the modification and sensitization had no influence on the crystal structure of TiO2 microspheres.
According to Fig. 8b, the disappearance of the 664 nm absorption band suggested that the conjugated π bond of the whole MB molecular structure was broken down[19, 20].
The characterizations of the morphology and structure of FeTCPP-SSA-TiO2 catalyst indicated that bridging bond linking interaction occurred between SSA-TiO2 and FeTCPP with SSA molecule as linking unit.
The morphology and structure of the photocatalyst was characterized.
The patterns indicated that the modification and sensitization had no influence on the crystal structure of TiO2 microspheres.
According to Fig. 8b, the disappearance of the 664 nm absorption band suggested that the conjugated π bond of the whole MB molecular structure was broken down[19, 20].
The characterizations of the morphology and structure of FeTCPP-SSA-TiO2 catalyst indicated that bridging bond linking interaction occurred between SSA-TiO2 and FeTCPP with SSA molecule as linking unit.
Online since: May 2012
Authors: Hao Zhang, Ze Meng Zhao, Ahmet Palazoglu, Wei Sun
As model-driven statistical prediction models, hidden Markov Models (HMMs) are rich in mathematical structure and work well in many important applications.
Due to the complex structure of HMM, long observation sequences would increase computational load by geometric ratio.
Pandis, in: Atmospheric chemistry and physics: From air pollution to climate change, edited by John Wiley, NY (1998) [2] Tilton.B.E: Envron.
Engineering Structures.
Due to the complex structure of HMM, long observation sequences would increase computational load by geometric ratio.
Pandis, in: Atmospheric chemistry and physics: From air pollution to climate change, edited by John Wiley, NY (1998) [2] Tilton.B.E: Envron.
Engineering Structures.
Online since: February 2016
Authors: Arantzazu Valdés, María Carmen Garrigós
Carbohydrate-based Advanced Biomaterials for Food Sustainability: a Review
Arantzazu Valdés and María Carmen Garrigós
Analytical Chemistry, Nutrition & Food Sciences Department, University of Alicante, P.O.
Primary plant cell wall structure [37].
Cellulose structure [13].
In: Ullmann's encyclopedia of industrial chemistry.
The structure, function, and biosynthesis of plant cell wall pectic polysaccharides, Carbohyd.
Primary plant cell wall structure [37].
Cellulose structure [13].
In: Ullmann's encyclopedia of industrial chemistry.
The structure, function, and biosynthesis of plant cell wall pectic polysaccharides, Carbohyd.
Online since: October 2005
Authors: X. Jiang, L. Blunt, P.J. Scott
The integrity of a surface is not
measured as a single entity but is assessed through assessment of the surface metallurgy/chemistry
and by means of surface metrology.
The definition of the structured surfaces was given by Evans and Bryan [8], as "structured surfaces are those where the surface structure is a design feature intended to give a specific functional performance" (e.g. retro-reflective pyramids in a road sign).
These so called structured textured patterns are becoming economically more and more important.
Unfortunately field parameters are not very good at characterising structured surfaces.
Its is becoming increasing clear that much development in the field of structured surfaces at both the micro and nano-scale will result in high aspect ratio, highly structured surfaces.
The definition of the structured surfaces was given by Evans and Bryan [8], as "structured surfaces are those where the surface structure is a design feature intended to give a specific functional performance" (e.g. retro-reflective pyramids in a road sign).
These so called structured textured patterns are becoming economically more and more important.
Unfortunately field parameters are not very good at characterising structured surfaces.
Its is becoming increasing clear that much development in the field of structured surfaces at both the micro and nano-scale will result in high aspect ratio, highly structured surfaces.
Online since: October 2014
Authors: Guang Chen, Xiao Ling Xu, Ying Chun Miao
The protuberant nanosheets with the diameter of about 50 nm on the lengthways array-like structure were exhibited, and then the concave pore structure could come into being.
Cundy, Hierarchical pore structures through diatom zeolitization, Angew.
Negishi, Preparation of TiO2 fibers with well-organized structures, J.
Seshadri, Porous gold structures through templating by echinoid skeletal plates, Chem.
Eldik, The chemistry of metal carbonato and carbon dioxide complexes, Chem.
Cundy, Hierarchical pore structures through diatom zeolitization, Angew.
Negishi, Preparation of TiO2 fibers with well-organized structures, J.
Seshadri, Porous gold structures through templating by echinoid skeletal plates, Chem.
Eldik, The chemistry of metal carbonato and carbon dioxide complexes, Chem.
Online since: May 2021
Authors: Abdul Halim Shaari, Soo Kien Chen, Noor Baayah Ibrahim, Mohd Mustafa Awang Kechik, Kean Pah Lim, Amirah Natasha Ishak, Eijin Lim, Lik Nguong Lau
LCMO crystallised in orthorhombic structure with space group Pnma while α-Fe2O3 exhibited in hexagonal form with space group R-3c.
Sample La0.7Ca0.3MnO3 Structure Type Orthorhombic Space group Pnma Reference code 98-010-6210 Composition of α-Fe2O3 0.00 0.05 0.10 0.15 0.20 a [Å] 5.455 5.459 5.462 5.454 5.458 b [Å] 7.706 7.714 7.717 7.704 7.707 c [Å] 5.471 5.461 5.464 5.474 5.469 Volume [Å3] 229.978 222.955 230.329 229.994 230.032 ∠ Mn-O1-Mn 159.555 159.609 159.607 159.537 159.566 ∠ Mn-O2-Mn 161.294 161.277 161.279 161.299 161.293 O1-Mn1 1.958 1.959 1.960 1.957 1.958 O2-Mn1 (1) 1.940 1.940 1.941 1.940 1.940 O2-Mn1 (2) 1.975 1.973 1.974 1.975 1.975 REXP (%) 4.534 4.222 3.977 4.041 3.559 RP (%) 4.243 3.664 3.400 3.626 2.867 RWP (%) 5.338 4.571 4.237 4.496 3.604 Goodness of Fit (GoF) 1.386 1.172 1.135 1.238 1.025 Crystalline size (nm) 30.9 32.1 30.0 30.3 29.9 Sample α-Fe2O3 Structure Type Hexagonal Space group R-3c Reference code 98-001-2617 a [Å] - 5.036 5.036 5.034 5.034 b [Å] - 5.036 5.036 5.034 5.034 c [Å] - 13.736 13.750 13.740 13.747 Volume [Å3] - 301.652 301.976 301.572 301.699 Four-point probe (4PP) system has
Hence, the addition of nano-sized α-Fe2O3 does not affect the structure of the LCMO phase.
Bhattacharyya, Enhanced Low-Field Magnetoresistance in La0.71Sr0.29MnO3 Nanoparticles Synthesized by the Nonaqueous Sol–Gel Route, Chemistry of Materials 26 (2014) 1702-1710
Ferromagnetic compounds of manganese with perovskite structure, Physical Review 82 (1951) 403
Sample La0.7Ca0.3MnO3 Structure Type Orthorhombic Space group Pnma Reference code 98-010-6210 Composition of α-Fe2O3 0.00 0.05 0.10 0.15 0.20 a [Å] 5.455 5.459 5.462 5.454 5.458 b [Å] 7.706 7.714 7.717 7.704 7.707 c [Å] 5.471 5.461 5.464 5.474 5.469 Volume [Å3] 229.978 222.955 230.329 229.994 230.032 ∠ Mn-O1-Mn 159.555 159.609 159.607 159.537 159.566 ∠ Mn-O2-Mn 161.294 161.277 161.279 161.299 161.293 O1-Mn1 1.958 1.959 1.960 1.957 1.958 O2-Mn1 (1) 1.940 1.940 1.941 1.940 1.940 O2-Mn1 (2) 1.975 1.973 1.974 1.975 1.975 REXP (%) 4.534 4.222 3.977 4.041 3.559 RP (%) 4.243 3.664 3.400 3.626 2.867 RWP (%) 5.338 4.571 4.237 4.496 3.604 Goodness of Fit (GoF) 1.386 1.172 1.135 1.238 1.025 Crystalline size (nm) 30.9 32.1 30.0 30.3 29.9 Sample α-Fe2O3 Structure Type Hexagonal Space group R-3c Reference code 98-001-2617 a [Å] - 5.036 5.036 5.034 5.034 b [Å] - 5.036 5.036 5.034 5.034 c [Å] - 13.736 13.750 13.740 13.747 Volume [Å3] - 301.652 301.976 301.572 301.699 Four-point probe (4PP) system has
Hence, the addition of nano-sized α-Fe2O3 does not affect the structure of the LCMO phase.
Bhattacharyya, Enhanced Low-Field Magnetoresistance in La0.71Sr0.29MnO3 Nanoparticles Synthesized by the Nonaqueous Sol–Gel Route, Chemistry of Materials 26 (2014) 1702-1710
Ferromagnetic compounds of manganese with perovskite structure, Physical Review 82 (1951) 403
Online since: July 2012
Authors: Sheng Li Chen, Peng Dong, Xiu Jun Ge, Zi Yuan Liu
This indicates that besides the ratio of molecular diameter to the pore diameter λ, the effective diffusion coefficient is also closely related to the pore structure of catalyst.
If a model catalyst which has a homogeneous pore structure is used in diffusion research, the calculated the diffusion coefficient will be more accurate for the uniform pore size.
But due to the different pore structure of the two catalysts the pore size distribution is very different.
It is not complete that only parameter λ is used to correlate the degree of diffusion restriction which would cause big difference for different pore structure.
Vol. 29 (1983), p. 725 [14] Bingchen Zhu: Chemical reaction engineering (Chemistry industry press, Beijing 2007) “In Chinese”
If a model catalyst which has a homogeneous pore structure is used in diffusion research, the calculated the diffusion coefficient will be more accurate for the uniform pore size.
But due to the different pore structure of the two catalysts the pore size distribution is very different.
It is not complete that only parameter λ is used to correlate the degree of diffusion restriction which would cause big difference for different pore structure.
Vol. 29 (1983), p. 725 [14] Bingchen Zhu: Chemical reaction engineering (Chemistry industry press, Beijing 2007) “In Chinese”
Online since: October 2004
Authors: Hasso Weiland
Nucleation density and
crystallographic orientation of new grains is determined by inhomogeneities of the deformed
structure.
For fully recrystallized products, this results in a finer grain structure near the surface.
As it is well known, many aluminum alloys experience a recovery of the dislocation structure directly upon deformation.
The nucleation rate is affected through the pinning of the dislocation structure, while the growth rate is affected by pinning of grain boundaries through the Zener Drag (see insert in Figure 5).
Papo, The Effect of Processing and Alloy Chemistry on the Recrystallization Kinetics of Aluminum Alloy AA5052, Dissertation University of Alabama at Birmingham, USA, 2001 [9] H.
For fully recrystallized products, this results in a finer grain structure near the surface.
As it is well known, many aluminum alloys experience a recovery of the dislocation structure directly upon deformation.
The nucleation rate is affected through the pinning of the dislocation structure, while the growth rate is affected by pinning of grain boundaries through the Zener Drag (see insert in Figure 5).
Papo, The Effect of Processing and Alloy Chemistry on the Recrystallization Kinetics of Aluminum Alloy AA5052, Dissertation University of Alabama at Birmingham, USA, 2001 [9] H.
Online since: July 2019
Authors: Pu Wang Li, Zhang Hu, Si Tong Lu, Si Dong Li, Dong Ying Zhang
The structures of chitosan caffeates were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and potentiometric titration.
CS is generally soluble in acid solutions, even though it has a crystalline structure which contains several hydrogen bonds.
In this paper, CS and CA were used as raw materials to prepare their composites, and their physical and chemical structure was characterized, the hemostatic properties were preliminarily explored as well.
Fig. 1 Chemical structure of chitosan and caffeic acid Materials and Methods Materials.
The characteristic diffraction peaks of chitosan have changed and new crystalline forms have gradually formed, which indicated that the structural units of chitosan and caffeic acid were combined to form new composite structures.
CS is generally soluble in acid solutions, even though it has a crystalline structure which contains several hydrogen bonds.
In this paper, CS and CA were used as raw materials to prepare their composites, and their physical and chemical structure was characterized, the hemostatic properties were preliminarily explored as well.
Fig. 1 Chemical structure of chitosan and caffeic acid Materials and Methods Materials.
The characteristic diffraction peaks of chitosan have changed and new crystalline forms have gradually formed, which indicated that the structural units of chitosan and caffeic acid were combined to form new composite structures.