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Online since: August 2014
Authors: Ul Haq Bakhtiar, Rashid Ahmed, A. Shaari, Muhammad Zaki bin Yaacob
From our calculations, it is observed, Cd:ZnO is more stable in ZB structure than that of WZ.
With a configuration of 2x1x1 for WZ and 1x1x1 for ZB structure, the extended structure consists of 8 atoms.
The band structures of Cd:ZnO in WZ and ZB geometry calculated with GGA and mBJ potential.
The energy gap of Cd-ZnO in both WZ and ZB structures corresponds to blue emission.
The Journal of Physical Chemistry B, 2001. 105(46): p. 11387-11390
With a configuration of 2x1x1 for WZ and 1x1x1 for ZB structure, the extended structure consists of 8 atoms.
The band structures of Cd:ZnO in WZ and ZB geometry calculated with GGA and mBJ potential.
The energy gap of Cd-ZnO in both WZ and ZB structures corresponds to blue emission.
The Journal of Physical Chemistry B, 2001. 105(46): p. 11387-11390
Online since: March 2013
Authors: Zhen Hua Dan, Izumi Muto, Nobuyoshi Hara, Feng Xiang Qin, Yu Sugawara
The as-spun Ti50Cu50 ribbon alloy was confirmed to have an amorphous structure (Fig. 2a).
Nanoporous structures after dealloying.
the difference nanoporous structure in different regions.
The HR-TEM image shows that the NPCs have a nanocrystalline structure, indicating the Cu adatoms were rearranged to form a nanocrystalline structure as they were dealloyed [3, 4].
[5] CRC handbook of chemistry and physics, D.R.
Nanoporous structures after dealloying.
the difference nanoporous structure in different regions.
The HR-TEM image shows that the NPCs have a nanocrystalline structure, indicating the Cu adatoms were rearranged to form a nanocrystalline structure as they were dealloyed [3, 4].
[5] CRC handbook of chemistry and physics, D.R.
Online since: August 2013
Authors: Chung Kuk Jin, Jin A Jeong
The effect of cathodic protection (CP) system on concrete structures can be changed at different condition.
Thus, this reaction leads to the cracking and spalling of concrete structures [3].
Chung, Tidal water effect on the hybrid cathodic protection systems for marine concrete structures, Journal of Advanced Concrete Technology 10 (2012) 389-394
Grimaldi, Influence of temperature on the potential reinforcing steel in concrete, under cathodic protection, Corrosion of Reinforcement in Concrete Construction, Royal Society of Chemistry 183 (1996) 369-377
Ali, Effect of temperature on cathodic protection criterion for reinforced concrete structures, ACI Special Publications 139 (1993) 21-40
Thus, this reaction leads to the cracking and spalling of concrete structures [3].
Chung, Tidal water effect on the hybrid cathodic protection systems for marine concrete structures, Journal of Advanced Concrete Technology 10 (2012) 389-394
Grimaldi, Influence of temperature on the potential reinforcing steel in concrete, under cathodic protection, Corrosion of Reinforcement in Concrete Construction, Royal Society of Chemistry 183 (1996) 369-377
Ali, Effect of temperature on cathodic protection criterion for reinforced concrete structures, ACI Special Publications 139 (1993) 21-40
Online since: July 2012
Authors: Ai Fang Liu, Zhou Lan Yin
Li3V2(PO4)3/C with monoclinic structure were prepared respectively by V2O5 and low valence vanadium oxide V2O3 via solid state reaction.
The structure, particle size and morphology of the powders were investigated by X-ray diffraction and scanning electron microscope.
Phase structure of the powders were analyzed by X-ray diffraction (XRD, Bruker D8 ADVANCE diffractometer) using Cu Kα radiation (1.5406 Å, 40 kV and 10°/min).
Results and discussions Crystal structure.
According to the standard pattern (JCPDS is 47-0107) of iso-structural monoclinic structure Li3Fe2(PO4)3, the crystal structure of LV3P begin to form at the temperature of 700 degree, and the intensity of the diffraction peak increased with the increase of the calcinations temperature, which indicates the crystallinity becomes better and better.
The structure, particle size and morphology of the powders were investigated by X-ray diffraction and scanning electron microscope.
Phase structure of the powders were analyzed by X-ray diffraction (XRD, Bruker D8 ADVANCE diffractometer) using Cu Kα radiation (1.5406 Å, 40 kV and 10°/min).
Results and discussions Crystal structure.
According to the standard pattern (JCPDS is 47-0107) of iso-structural monoclinic structure Li3Fe2(PO4)3, the crystal structure of LV3P begin to form at the temperature of 700 degree, and the intensity of the diffraction peak increased with the increase of the calcinations temperature, which indicates the crystallinity becomes better and better.
Online since: October 2011
Authors: Jean Michel Bouler, Georg Berger, Sophie Quillard, Philippe Deniard, Renate Gildenhaar, Charlotte Mellier, Julien Hervelin
Results and Discussion
The structure of β-TCP has been extensively investigated in previous works [10,11].
Elliot, Structure and chemistry of the apatites and other calcium orthophosphates, Elsevier, Amsterdam, 1994
Bouler, Effect of sodium doping in β-tricalcium phosphate on its structure and properties, Chem.
Shekhtman, Crystal structures and characterization of Ca9Fe(PO4)7 and Ca9FeH0.9(PO4)7, J.
The crystal structure of pure in β-Ca3(PO4)2, J.
Elliot, Structure and chemistry of the apatites and other calcium orthophosphates, Elsevier, Amsterdam, 1994
Bouler, Effect of sodium doping in β-tricalcium phosphate on its structure and properties, Chem.
Shekhtman, Crystal structures and characterization of Ca9Fe(PO4)7 and Ca9FeH0.9(PO4)7, J.
The crystal structure of pure in β-Ca3(PO4)2, J.
Online since: December 2009
Authors: N.J. Al-Thani, Mariam Al-Ma'adeed
Higher doses up to 100 kGy cause the PEO crystallite boundaries to be erased and to blur
spherulites structure; it also leads to an increase in the crystallinity.
Understanding the physical and the physicochemical structure of these blends is a necessity for using them in technologically advanced applications.
As seen in these photos pure PEO film has spherulite crystal structure with hyperbolas boundaries, and different sizes indicating that they were nucleated at different times.
This is proved by the TGA curves where pure PEO irradiated by 5 kGy stands heat by 100 °C more than virgin PEO indicating that the branches of the structure are crosslinked.
Alina Sionkowska, Photochemical stability of collagen/poly (ethylene oxide) blends, Journal of Photochemistry and Photobiology A: Chemistry 177 (2006) 61-67. 3.
Understanding the physical and the physicochemical structure of these blends is a necessity for using them in technologically advanced applications.
As seen in these photos pure PEO film has spherulite crystal structure with hyperbolas boundaries, and different sizes indicating that they were nucleated at different times.
This is proved by the TGA curves where pure PEO irradiated by 5 kGy stands heat by 100 °C more than virgin PEO indicating that the branches of the structure are crosslinked.
Alina Sionkowska, Photochemical stability of collagen/poly (ethylene oxide) blends, Journal of Photochemistry and Photobiology A: Chemistry 177 (2006) 61-67. 3.
Online since: June 2008
Authors: Vasco Teixeira, Joaquim Carneiro, C. Batista, J. Mendes
Carneiro
University of Minho, GRF - Functional Coatings Group, Physics Department, Campus de Azurém,
4800 Guimarães, Portugal
a
cbatista@fisica.uminho.pt
Keywords: Vanadium oxide; reactive dc magnetron sputtering; characterization; morphology;
structure.
It can be observed that only the pattern of the sample prepared at 400ºC presents a polycrystalline structure being composed of both β-V2O5 and V6O13.
The structure and morphology of the films are greatly affected by the processing conditions showing strong consequences on the optical response.
Lei: Journal of Solid State Chemistry Vol. 159 (2001), p. 181
It can be observed that only the pattern of the sample prepared at 400ºC presents a polycrystalline structure being composed of both β-V2O5 and V6O13.
The structure and morphology of the films are greatly affected by the processing conditions showing strong consequences on the optical response.
Lei: Journal of Solid State Chemistry Vol. 159 (2001), p. 181
Online since: June 2014
Authors: Fei Yi Yang, Hong Min Kan, Xiao Yang Wang, Ning Zhang, Hai Bo Long, Tong Zhang
Used as Adsorbent
Materials of hollow nano structures possess a large specific surface area.
In a word, the nano ceramic materials with hollow nano structure are often used as adsorbent, for example TiO2 [3].
TiO2 has some advantages of good chemistry stability, non-toxic, long service life, corrosion resistance, etc.
DPF is made of the materials with a specific structure and the resistance to high temperature.
All of these should be improved by further optimization of sintering process and structure design.
In a word, the nano ceramic materials with hollow nano structure are often used as adsorbent, for example TiO2 [3].
TiO2 has some advantages of good chemistry stability, non-toxic, long service life, corrosion resistance, etc.
DPF is made of the materials with a specific structure and the resistance to high temperature.
All of these should be improved by further optimization of sintering process and structure design.
Online since: January 2005
Authors: Y. Zhang, Cheng Zhou, Jian He, Zhen Ji, You Son Gu, Xiao Yan Zhan
However, its magnetic properties strongly depend on its composition and structure [6].
By using multilayered structures, we have more controls on microstructures.
FePt has two phases, the soft magnetic phase with disorder fcc structure and the hard phase with ordered fct structure.
In our multilayered structures, the crystal structure of FePt phase depends on layer thickness and annealing temperature, and falls somewhere in the middle of the two standard cases.
Conclusions Hard magnetic FePt phase with fct crystal structure forms after annealed.
By using multilayered structures, we have more controls on microstructures.
FePt has two phases, the soft magnetic phase with disorder fcc structure and the hard phase with ordered fct structure.
In our multilayered structures, the crystal structure of FePt phase depends on layer thickness and annealing temperature, and falls somewhere in the middle of the two standard cases.
Conclusions Hard magnetic FePt phase with fct crystal structure forms after annealed.
Online since: September 2009
Authors: Maria Giurginca, Lucretia Miu
Spectral Investigations Concerning the Degradation Degree of
Romanian Historical Leather
Maria Giurginca1, a and Lucretia Miu2,b
1
University POLITEHNICA of Bucharest, Faculty of Applied Chemistry and Materials Science,
Bucharest, Polizu Street No 1, 011061, tel/fax 004/0213154193, Romania
2
National Research and Development Institute for Textile and Leather, I.
Leather was used for book covers due to its flexibility, structure and three dimensional network of fibers.
Vibrational and electronic spectroscopy (FT-IR, UV-VIS, NIR) have been applied to evaluate the structural changes in the molecular structure and the color deterioration [3].
Results and discussion FT-IR analysis was employed to investigate the secondary structure of the collagen by the use of marker bands.
The amide I is a sensitive marker of the collagen secondary structure, and amide II, by this shift, points to the helix-coil conversion [4].
Leather was used for book covers due to its flexibility, structure and three dimensional network of fibers.
Vibrational and electronic spectroscopy (FT-IR, UV-VIS, NIR) have been applied to evaluate the structural changes in the molecular structure and the color deterioration [3].
Results and discussion FT-IR analysis was employed to investigate the secondary structure of the collagen by the use of marker bands.
The amide I is a sensitive marker of the collagen secondary structure, and amide II, by this shift, points to the helix-coil conversion [4].