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Online since: January 2015
Authors: Jerzy Cybo, Adrian Barylski, Joanna Maszybrocka
The paper presents changes in UHMWPE morphology and structure caused by irradiation with an electron beam and plastic deformation.
Flory, Principles of Polymer Chemistry, Cornell Unversity Press, New York, 1953. ].
Lamellar Structure Evaluation.
The Evaluation of the Orientation of the Lamellar Structure. 2-D SAXS examinations were performed using a small-camera, 498 mm in length.
The most significant changes, however, are those in the topological structure of the polymer.
Flory, Principles of Polymer Chemistry, Cornell Unversity Press, New York, 1953. ].
Lamellar Structure Evaluation.
The Evaluation of the Orientation of the Lamellar Structure. 2-D SAXS examinations were performed using a small-camera, 498 mm in length.
The most significant changes, however, are those in the topological structure of the polymer.
Online since: February 2014
Authors: Jing Chang Zhao, Zhen Lai Zhou
The phase structure, morphology, dielectric and piezoelectric properties of prepared samples were investigated, respectively.
Especially, it was found that the phase of NBT-BT transforms from rhombohedral to tetragonal structure with increasing BT content.
The phase structure of CCTO-modified (Na0.5Bi0.5)0.93Ba0.07TiO3 ceramic was examined by a Rigaku D/max IIIB X-ray diffraction meter.
According to defect chemistry, it is estimated the thermal decomposition increased the cationic and oxygen vacancies by the formation of Schottky-like defects.
Furthermore, the phase structure of NBT-BT ceramics has not been evidently changed by doping a small amount of CCTO additives.
Especially, it was found that the phase of NBT-BT transforms from rhombohedral to tetragonal structure with increasing BT content.
The phase structure of CCTO-modified (Na0.5Bi0.5)0.93Ba0.07TiO3 ceramic was examined by a Rigaku D/max IIIB X-ray diffraction meter.
According to defect chemistry, it is estimated the thermal decomposition increased the cationic and oxygen vacancies by the formation of Schottky-like defects.
Furthermore, the phase structure of NBT-BT ceramics has not been evidently changed by doping a small amount of CCTO additives.
Online since: October 2006
Authors: Jeffrey W. Long
Long
1, a
1
Code 6170, Surface Chemistry Branch
Naval Research Laboratory
4555 Overlook Avenue SW
Washington, DC 20375
a
jeffrey.long@nrl.navy.mil
Keywords: Supercapacitor, carbon aerogel, conducting polymer.
The electroactive polymer coating is incorporated to increase the overall chargestorage capacity of the resulting hybrid electrode structure.
Nitrogen-sorption techniques are used to characterize the carbon nanoarchitecture pore structure before and after application of the polymer coating.
Such a hierarchical pore structure is typical for carbon aerogels, where the mesoporous/macroporous structure is defined by a bonded 3-dimensional network of carbon particles, which are themselves microporous [7,8].
In the proceeding section we will discuss how this modification of the nanofoam pore structure affects electrochemical performance.
The electroactive polymer coating is incorporated to increase the overall chargestorage capacity of the resulting hybrid electrode structure.
Nitrogen-sorption techniques are used to characterize the carbon nanoarchitecture pore structure before and after application of the polymer coating.
Such a hierarchical pore structure is typical for carbon aerogels, where the mesoporous/macroporous structure is defined by a bonded 3-dimensional network of carbon particles, which are themselves microporous [7,8].
In the proceeding section we will discuss how this modification of the nanofoam pore structure affects electrochemical performance.
Online since: June 2010
Authors: Marianna Foldvari
It is at this size scale - about 100 nanometers or less - that biological molecules and structures inside
living cells operate."
Each CNT can be considered a single macromolecule formed from a number of carbon atoms in a specific structure.
Arnold et al [109] used this method to sort nanotubes by electric structure.
The code would contain five typographic fields, such as the chemical class, size and shape, core chemistry, ligand chemistry and solubility.
Grennberg: Chemistry Vol. 12 (2006), p. 3869 48.
Each CNT can be considered a single macromolecule formed from a number of carbon atoms in a specific structure.
Arnold et al [109] used this method to sort nanotubes by electric structure.
The code would contain five typographic fields, such as the chemical class, size and shape, core chemistry, ligand chemistry and solubility.
Grennberg: Chemistry Vol. 12 (2006), p. 3869 48.
Online since: January 2009
Authors: Jun Ying Zhang, Bai Biao Huang, Tian Min Wang, Hai Ling Zhu, Xiang Lan, Chun Zhi Li
The
photo-catalytic properties of Cu2O films are affected by not only the crystal structure but also the
surface morphology.
In the present investigation, the sputtering pressure, sputtering power and oxygen flow rates were established to control structures of deposited films, and the relationship between the structures and photo-catalytic properties of Cu2O films was investigated.
In order to drop the sputtering power, the effect of the work pressure on the structures of samples in the second set was discussed.
It was found that the crystal structures of the Cu2O films varied as oxygen flow rate changed.
Yu_, Xinchen Wang, Lizhi Zhang and Jiaguo Yu: Journal of Solid State Chemistry 178 (2005), 321-328
In the present investigation, the sputtering pressure, sputtering power and oxygen flow rates were established to control structures of deposited films, and the relationship between the structures and photo-catalytic properties of Cu2O films was investigated.
In order to drop the sputtering power, the effect of the work pressure on the structures of samples in the second set was discussed.
It was found that the crystal structures of the Cu2O films varied as oxygen flow rate changed.
Yu_, Xinchen Wang, Lizhi Zhang and Jiaguo Yu: Journal of Solid State Chemistry 178 (2005), 321-328
Online since: July 2011
Authors: Yi Fu Zhang, Mei Juan Fan, Hou Bin Li, Xing Hai Liu, Chi Huang, Guang Yong Xie
It was found that PVA could not only act as the reducing reagent but also as the structure-directing reagent.
It was known that 1D nanostructures are more prone to charge than bulk crystalline structures.
Therefore, PVA could not only act as the reducing reagent but also as the structure-directing reagent in our synthetic routes.
After 12 h, many ill-defined structures are synthesized, but some belt-like structures are visible, implying that this reaction time is not sufficient for the formation of nanobelts.
This could be illustrated that some belt-like structures are formed at relatively short time (12 h), as shown in Fig. 4b.
It was known that 1D nanostructures are more prone to charge than bulk crystalline structures.
Therefore, PVA could not only act as the reducing reagent but also as the structure-directing reagent in our synthetic routes.
After 12 h, many ill-defined structures are synthesized, but some belt-like structures are visible, implying that this reaction time is not sufficient for the formation of nanobelts.
This could be illustrated that some belt-like structures are formed at relatively short time (12 h), as shown in Fig. 4b.
Online since: December 2013
Authors: Yong Lin, Wei Li Hou, Cheng Yu Ma
The research test the breaking strength, the breaking elongation and the molecular structure of those fiber.
pH Effects on Molecular Structure.
Fig 6 Molecular Structure of PSA Fiber Fig.6 shows the molecular structure of PSA fiber.
Hong.The Application of Spectrometer Method in Organic Chemistry.Bejing:Science Press,1980.p.44-45(In Chinese) [4] J.
Feng.The Performance and Application of PSA fiber.Shanghai Textile Science Research Institute,vol.10(1981),p.49-52(In Chinese) [8] George W.Gokel.Handbook of Organic Chemistry.S.H.
pH Effects on Molecular Structure.
Fig 6 Molecular Structure of PSA Fiber Fig.6 shows the molecular structure of PSA fiber.
Hong.The Application of Spectrometer Method in Organic Chemistry.Bejing:Science Press,1980.p.44-45(In Chinese) [4] J.
Feng.The Performance and Application of PSA fiber.Shanghai Textile Science Research Institute,vol.10(1981),p.49-52(In Chinese) [8] George W.Gokel.Handbook of Organic Chemistry.S.H.
Online since: October 2006
Authors: Joachim Bill
In this connection, biomineralization yields highly complex
organic/inorganic structures, e. g. within nacre or bones.
The processes of biomineralization lead to the formation of highly complex structures found for instance within nacre.
Fig. 5: Typical photoluminescence spectrum that corresponds to film structures described in Fig. 4.
Mann: Biomimetic Materials Chemistry (VCH Publishers, New York 1996)
Berg: Principles of Bioinorganic Chemistry (University Science Books, Mill Valley, CA 1994)
The processes of biomineralization lead to the formation of highly complex structures found for instance within nacre.
Fig. 5: Typical photoluminescence spectrum that corresponds to film structures described in Fig. 4.
Mann: Biomimetic Materials Chemistry (VCH Publishers, New York 1996)
Berg: Principles of Bioinorganic Chemistry (University Science Books, Mill Valley, CA 1994)
Online since: June 2024
Authors: Ken Aldren S. Usman, Senfred Matthew O. Merca, Julius Caezar II M. Damo, Hannah Kristel D. Vargas, Ramel John Anthony V. Biñas, Catherine Angeli R. San Jose, Sean Benson A. See, Marlon T. Conato, Yasmin D.G. Edañol
Structural analysis revealed a MOF-like structure of the bimetallic oxalate precursors.
The proposed structure is not fixed as the MOF-like structure of the oxalates can have different arrangements of the metal centers.
However, the permanent motif of the structure is that there is a metal-oxygen bond as well as lattice water.
An examination of the structure of the bimetallic copper-iron oxalate precursors revealed a MOF-like structure.
When subjected to thermal decomposition, this structure yielded a single-phase bimetallic copper-iron oxide.
The proposed structure is not fixed as the MOF-like structure of the oxalates can have different arrangements of the metal centers.
However, the permanent motif of the structure is that there is a metal-oxygen bond as well as lattice water.
An examination of the structure of the bimetallic copper-iron oxalate precursors revealed a MOF-like structure.
When subjected to thermal decomposition, this structure yielded a single-phase bimetallic copper-iron oxide.
Online since: May 2011
Authors: Ji Da Chen, Zhi Ping Qiu, Su Zhao Gao, Juan Bu, Qian Qian Qi
Preparation Cell Scaffolds with Well Defined Pore Structure Through Elastic Porogen/Pressure Filtration
Qianqian Qi 1,a, Jida Chen 1,b, Suzhao Gao1, Juan Bu1, Zhiping Qiu1
1 College of Chemistry and Chemical Engineering, Chongqing University, China
a qqqsanpidan@126.com, b chencqu@cqu.edu.cn
Keywords: Tissue engineering, biomaterials, porous cell scaffold, hydrogel
Abstract.
In order to engineer substitutes for tissue replacements, cell scaffolds with specific shape and pore structure are required.
The properties of elastic porogen (deformation ratio, water solubility, appearance and dimension) and pore structure of scaffolds were studied, respectively.
Observation of pore structure in scaffolds.
Observe the pore morphology, structure, and connectivity of scaffold with scanning electron microscopy(SEM)(TESCAN VEGA2, Tescan, Czech).
In order to engineer substitutes for tissue replacements, cell scaffolds with specific shape and pore structure are required.
The properties of elastic porogen (deformation ratio, water solubility, appearance and dimension) and pore structure of scaffolds were studied, respectively.
Observation of pore structure in scaffolds.
Observe the pore morphology, structure, and connectivity of scaffold with scanning electron microscopy(SEM)(TESCAN VEGA2, Tescan, Czech).