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Online since: September 2011
Authors: Rui Juan Xie, Biao Wang, Yang Yang Huang
The structure of the composite was studied by X-ray diffraction and infrared spectroscopy.
And the structure of the specimens was also confirmed by the FTIR spectra with the wave number ranging from 400 to 4000 cm-1.
The results indicated that SF with β-sheet structure existed in the composite; HA in the hardening body of the composite was similar to that of pure CPC (Fig.3 (b)).
The adding of SF had no significant effect on the structure of the composite.
Ding: Materials Chemistry and Physics Vol. 120 (2010) ,p.282 [4] F.
And the structure of the specimens was also confirmed by the FTIR spectra with the wave number ranging from 400 to 4000 cm-1.
The results indicated that SF with β-sheet structure existed in the composite; HA in the hardening body of the composite was similar to that of pure CPC (Fig.3 (b)).
The adding of SF had no significant effect on the structure of the composite.
Ding: Materials Chemistry and Physics Vol. 120 (2010) ,p.282 [4] F.
Online since: June 2015
Authors: U. Hashim, Q. Humayun
All the diffraction peaks are associated with the JCPDS card no. 036-1451 of the hexagonal ZnO structure.
The electron mobility in the lattice structure decreases and further increases the resistivity at low doping concentration.
Lee, Nanocomposites of reduced graphene oxide nanosheets and conducting polymer for stretchable transparent conducting electrodes, Journal of Materials Chemistry, 22 (2012) 23759-23766
Meng, Initial study on the structure and optical properties of Zn1-xFexO films, Thin Solid Films, 515 (2007) 5462-5465
Pan, Local Fe structure and ferromagnetism in Fe-doped ZnO films, Journal of Physics Condensed Matter, 18, (2006), 7471-7479
The electron mobility in the lattice structure decreases and further increases the resistivity at low doping concentration.
Lee, Nanocomposites of reduced graphene oxide nanosheets and conducting polymer for stretchable transparent conducting electrodes, Journal of Materials Chemistry, 22 (2012) 23759-23766
Meng, Initial study on the structure and optical properties of Zn1-xFexO films, Thin Solid Films, 515 (2007) 5462-5465
Pan, Local Fe structure and ferromagnetism in Fe-doped ZnO films, Journal of Physics Condensed Matter, 18, (2006), 7471-7479
Online since: July 2015
Authors: Raimons Poplausks, Kārlis Agris Gross, Arturs Vīksna, Agnese Osīte
Hydrothermally Synthesized Strontium Peroxyapatite
Agnese Osite1, a *, Karlis Agris Gross2, b, Arturs Viksna1, c
and Raimonds Poplausks3, d
1Department of Analytical Chemistry, University of Latvia, K.
Valdemara Str. 48, Riga, LV-1013, Latvia 2Biomaterials Research Laboratory, Riga Technical University, Azenes Str. 14/24, Riga, LV-1048, Latvia 3Institute of Chemical Physics, University of Latvia, Kronvalda Blvd. 4, Riga, LV- 1010, Latvia aagnese.osite@lu.lv, bKarlis-Agris.Gross@rtu.lv, carturs.viksna@lu.lv, draimonds.poplausks@lu.lv Keywords: strontium peroxyapatite, hydrogen peroxide, permanganatometric titration Abstract The current research focuses on peroxide ion incorporation in the structure of strontium hydroxyapatite (SrHAp) by exposure to H2O2 in a closed hydrothermal vessel under mild conditions at 130 to 170 oC.
Peroxide enriched strontium apatite (SrPerAp) was characterized for structure by X-Ray diffraction, for peroxide content- by permanganometric titration and then viewed by SEM.
Starting SrHAp powders showed an amorphous structure in XRD patterns.
The structure of SrHAp before peroxide treatment represented individual spherical particles.
Valdemara Str. 48, Riga, LV-1013, Latvia 2Biomaterials Research Laboratory, Riga Technical University, Azenes Str. 14/24, Riga, LV-1048, Latvia 3Institute of Chemical Physics, University of Latvia, Kronvalda Blvd. 4, Riga, LV- 1010, Latvia aagnese.osite@lu.lv, bKarlis-Agris.Gross@rtu.lv, carturs.viksna@lu.lv, draimonds.poplausks@lu.lv Keywords: strontium peroxyapatite, hydrogen peroxide, permanganatometric titration Abstract The current research focuses on peroxide ion incorporation in the structure of strontium hydroxyapatite (SrHAp) by exposure to H2O2 in a closed hydrothermal vessel under mild conditions at 130 to 170 oC.
Peroxide enriched strontium apatite (SrPerAp) was characterized for structure by X-Ray diffraction, for peroxide content- by permanganometric titration and then viewed by SEM.
Starting SrHAp powders showed an amorphous structure in XRD patterns.
The structure of SrHAp before peroxide treatment represented individual spherical particles.
Online since: January 2022
Authors: Alya Naili Rozhan, Hanisah Manshor, Ahmad Zahirani Ahmad Azhar, Nursamirah Roshidan
The structure of crystalline carbon in composite was analyses by X-Ray Diffraction (XRD).
X-ray Diffraction (XRD) analysis was used to investigate crystalline material structure.
This indicates that, the organic binder will evaporate and leave a porous structure in the sintered body during the sintering process.
Procedia Chemistry, 19, 68-74 (2016)
Journal of Industrial and Engineering Chemistry, 20(5), 2883-2887 (2014)
X-ray Diffraction (XRD) analysis was used to investigate crystalline material structure.
This indicates that, the organic binder will evaporate and leave a porous structure in the sintered body during the sintering process.
Procedia Chemistry, 19, 68-74 (2016)
Journal of Industrial and Engineering Chemistry, 20(5), 2883-2887 (2014)
Online since: December 2020
Authors: Jean Ebothé, Abdelhakim Mahdjoub, Sara Benzitouni, Mourad Zaabat, Meriem Guemini
Nanocrystalline films with a ZnO hexagonal wurtzite structure and two preferred orientations (002) and (103) were obtained.
The crystalline structure was explored by X-ray diffractometer (Bruker AXS-8D type) with Cu Kα radiation (l = 0.154056 nm).
Cai, The Advancing of Zinc Oxide Nanoparticles for Biomedical Applications, Bioinorganic Chemistry and Applications, (2018) 1062562-18
Griffini, The role of sol–gel chemistry in the low-temperature formation of ZnO buffer layers for polymer solar cells with improved performance, RSC Advances, 6 (2016) 46915–46924
Kim, Growth of transparent conducting nano-structured In doped ZnO thin films by pulsed DC magnetron sputtering.
The crystalline structure was explored by X-ray diffractometer (Bruker AXS-8D type) with Cu Kα radiation (l = 0.154056 nm).
Cai, The Advancing of Zinc Oxide Nanoparticles for Biomedical Applications, Bioinorganic Chemistry and Applications, (2018) 1062562-18
Griffini, The role of sol–gel chemistry in the low-temperature formation of ZnO buffer layers for polymer solar cells with improved performance, RSC Advances, 6 (2016) 46915–46924
Kim, Growth of transparent conducting nano-structured In doped ZnO thin films by pulsed DC magnetron sputtering.
Online since: February 2021
Authors: Shamo Zokhrab Tapdiqov
Polymers with such a homogeneous structure are not beneficial for clinical applications and they cannot biodegrade.
The structure and morphology of the gel were characterized.
The porosity and space within the gel reduces after loading with the drug, and the regular structure of the matrix changes to a more condensed form.
Chemistry, 17, 2976, (2016)
Jeong, Significance of secondary structure in nanostructure formation and thermosensitivity of polypeptide block copolymers, Soft Matter., 2008, 4, 2383-2387
The structure and morphology of the gel were characterized.
The porosity and space within the gel reduces after loading with the drug, and the regular structure of the matrix changes to a more condensed form.
Chemistry, 17, 2976, (2016)
Jeong, Significance of secondary structure in nanostructure formation and thermosensitivity of polypeptide block copolymers, Soft Matter., 2008, 4, 2383-2387
Online since: November 2011
Authors: Ren Hua Zheng, Hua Jiang Jiang, Qun Shen, Hai Chang Guo
The structures of the monomer and polymer were characterized by IR, 1H-NMR, and elemental analysis.
Compared with traditional magnets, organic polymeric ferromagnets have many advantages, such as various structures, low density and easy processing, etc.
For example, the light soft ferromagnetic materials are applied in magnetic-optic materials, micromation of electron products, novel absorbents of microwave, space kinetic systems and universe sail systems[6-8]. 1,10-Phenanthroline and its derivatives are very important ligands in organometallic chemistry because they can also provide bidentate N-donor sites for chelating with metal ions to form bridge ligands[9,10], except that 4,7-Bis(4-aminophenoxy)-l, l0-phenanthroline can be condensed with a variety of carbonyl-containing compounds to form additional derivatives.
Therefore, design and synthesis of polymeric complexes with a conjugated structure might get a new kind of magnetic materials.
Experiment Materials Scheme 1 Synthetic routes of BAPcBDA and suggested structures for the corresponding metal complex Dimethyl sulfoxide (DMSO) was dried using a molecular sieve for several days and distilled prior to use. 4,7-dichloro-l,l0-phenanthroline was prepared according to the literature[15].
Compared with traditional magnets, organic polymeric ferromagnets have many advantages, such as various structures, low density and easy processing, etc.
For example, the light soft ferromagnetic materials are applied in magnetic-optic materials, micromation of electron products, novel absorbents of microwave, space kinetic systems and universe sail systems[6-8]. 1,10-Phenanthroline and its derivatives are very important ligands in organometallic chemistry because they can also provide bidentate N-donor sites for chelating with metal ions to form bridge ligands[9,10], except that 4,7-Bis(4-aminophenoxy)-l, l0-phenanthroline can be condensed with a variety of carbonyl-containing compounds to form additional derivatives.
Therefore, design and synthesis of polymeric complexes with a conjugated structure might get a new kind of magnetic materials.
Experiment Materials Scheme 1 Synthetic routes of BAPcBDA and suggested structures for the corresponding metal complex Dimethyl sulfoxide (DMSO) was dried using a molecular sieve for several days and distilled prior to use. 4,7-dichloro-l,l0-phenanthroline was prepared according to the literature[15].
Online since: August 2013
Authors: Ming Zhang, Hai Yan Chen, Zhong Yi Xie, Ting Zhu, Chang Hao Yan, Zhi Jiao Zhang
ATRP Synthesis of PS-b-PtBMA and Preparation of Porous film
Yan chang hao1, Zhang zhi jiao1, a, Chen hai yan1, 3, Xie zhong yi1, Zhu ting1, Zhang ming1, 2*, b
1School of Chemistry and Chemical Engineering, Yangzhou University, Jiangsu Yangzhou, China
2Yangzhou University test center, Jiangsu Yangzhou, China
3Yangzhou Polytechnic College, Jiangsu Yangzhou, China
a 594006227@qq.com b lxyzhangm@yzu.edu.cn
Key word: honeycomb porous film; atom transfer radical polymerization; block copolymer; macromolecules initiator
Abstract: The polystyrene with end group of Br was synthesized by using MBrP as the initiator, CuBr/ PMDETA as the catalyst system according to atom transfer radical polymerization (ATRP).
The structure of the product was characterized by GPC,FTIR,1H-NMR.
The chain structure of PS-Br, PS-b-PtBMA,PS-b-PMAA were confirmed by IR spectrum in fig.4 and 1HNMR spectrum in fig.5.
b a c Fig.6 The SEM picture on concentration of (a)50%,(b)30%,(c)15% From the Scanning Electron Micrographs, we can see the shape of porous membranes were the isolated ordered round structure, because amphiphilic block copolymer in selective solvent has a higher segment density that can effective stabilize the water droplets.
Polystyrene comb polymers built on cellulose or poly(styrene-co-2-hydroxyethylmethacrylate) backbones as substrates for the preparation of structured honeycomb films.
The structure of the product was characterized by GPC,FTIR,1H-NMR.
The chain structure of PS-Br, PS-b-PtBMA,PS-b-PMAA were confirmed by IR spectrum in fig.4 and 1HNMR spectrum in fig.5.
b a c Fig.6 The SEM picture on concentration of (a)50%,(b)30%,(c)15% From the Scanning Electron Micrographs, we can see the shape of porous membranes were the isolated ordered round structure, because amphiphilic block copolymer in selective solvent has a higher segment density that can effective stabilize the water droplets.
Polystyrene comb polymers built on cellulose or poly(styrene-co-2-hydroxyethylmethacrylate) backbones as substrates for the preparation of structured honeycomb films.
Online since: September 2013
Authors: Yang Jiang, Hua Rong Shen, Wei Zhong He
The effect of calcinations temperature on the crystal structure of MgO was analyzed by XRD and SEM.
In addition, the solution was churned in the electromagnetic stirrer at velocity of stir 300R/min during determination process. 1.3 Analytical method The decomposition temperature of magnesite tailings was analyzed by TG-DSC analyzer, the effect of calcinations temperature on the decomposition of MgCO3 and the crystal structure of MgO was analyzed by XRD and Scherrer formula.
Its crystal structure arrangement was so loose and particle size was so small that the activity of MgO was much high, the suspension conductivity value was large.
Although the magnesite tailings calcined at 1150°C was completely decomposed, the structure of MgO became close, crystallization tended to integrity, and lattice binding enlarged, so the activity of MgO decreased and the hydration rate slowed down, indicating that the suspension conductivity value of MgO particle was small[8-9]. 2.4 Effect of calcination temperature on the morphology of MgO Fig.4 showed SEM micrographs of MgO prepared under different calcination conditions.
Thermo- chemistry and microstructures of MgO–C refractories containing various antioxidants.
In addition, the solution was churned in the electromagnetic stirrer at velocity of stir 300R/min during determination process. 1.3 Analytical method The decomposition temperature of magnesite tailings was analyzed by TG-DSC analyzer, the effect of calcinations temperature on the decomposition of MgCO3 and the crystal structure of MgO was analyzed by XRD and Scherrer formula.
Its crystal structure arrangement was so loose and particle size was so small that the activity of MgO was much high, the suspension conductivity value was large.
Although the magnesite tailings calcined at 1150°C was completely decomposed, the structure of MgO became close, crystallization tended to integrity, and lattice binding enlarged, so the activity of MgO decreased and the hydration rate slowed down, indicating that the suspension conductivity value of MgO particle was small[8-9]. 2.4 Effect of calcination temperature on the morphology of MgO Fig.4 showed SEM micrographs of MgO prepared under different calcination conditions.
Thermo- chemistry and microstructures of MgO–C refractories containing various antioxidants.
Online since: June 2015
Authors: Moayad Husein Flaifel, Naif Mohammed Al-Hada, Elias B. Saion, Mazliana A. Kamarudeen, Salahudeen A. Gene, Abdul H. Shaari
The structure and morphology of the calcined oxide nanoparticles have been examined by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively.
Characterization The properties of the prepared CdO nanoparticle were characterized by several techniques to investigate the crystalline structure, particle size and particle size distribution.
The structure of CdO nanoparticles has been examined by X-ray diffractometry (XRD Shimadzu model 6000) using Cu Kα (0.154 nm) as a radiation source to generate diffraction patterns from the crystalline powder samples at ambient temperature in 2θ range of 10◦-90◦.
The existence of multiple diffraction peaks of (111), (200), (220), (311), (222) and (400) in the diffraction patterns suggests that the CdO samples have a typical face centered cubic (FCC) structure referring to the PDF Card No: 005-0640 data [25].
Lide, CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data, CRC Press, Boca Raton [etc.], 1996
Characterization The properties of the prepared CdO nanoparticle were characterized by several techniques to investigate the crystalline structure, particle size and particle size distribution.
The structure of CdO nanoparticles has been examined by X-ray diffractometry (XRD Shimadzu model 6000) using Cu Kα (0.154 nm) as a radiation source to generate diffraction patterns from the crystalline powder samples at ambient temperature in 2θ range of 10◦-90◦.
The existence of multiple diffraction peaks of (111), (200), (220), (311), (222) and (400) in the diffraction patterns suggests that the CdO samples have a typical face centered cubic (FCC) structure referring to the PDF Card No: 005-0640 data [25].
Lide, CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data, CRC Press, Boca Raton [etc.], 1996