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Online since: March 2005
Authors: V.V. Vodnik, M.I. Čomor, M. Grujić-Brojčin, R. Kostić, J.M. Nedeljković, N.Ž Romčević, M.J. Romčević
In this paper we present far-infrared reflectivity (FIR) and Raman
spectra of Cd1-xMnxS nanoparticles (d~4.5 nm) of various compositions, prepared by colloid
chemistry based procedure.
Bulk Cd1-xMnxS exists in wurtzite structure for x up to ~0.45 [15].
For wurtzite structure, with four atoms per primitive cell, Γ-A direction allows such modeling with additional zone folding.
In reality, there is variety of nanoparticle structures.
Intensity of modes is proportional to probability that structure modeled by certain type of linear chain exists.
Bulk Cd1-xMnxS exists in wurtzite structure for x up to ~0.45 [15].
For wurtzite structure, with four atoms per primitive cell, Γ-A direction allows such modeling with additional zone folding.
In reality, there is variety of nanoparticle structures.
Intensity of modes is proportional to probability that structure modeled by certain type of linear chain exists.
Online since: February 2026
Authors: Sayant Saengsuwan, Siriwat Radabutra, Arnon Thanong
Fourier transform infrared spectroscopy (FTIR) (Nicolet 6700, Thermo Scientific) was used to identify molecular structures and functional groups.
This indicates the effective removal of surface wax and silica from the rice straw, confirming the isolation of lignin's chemical structure.
Acknowledgements The research project by Ubon Ratchathani University Department of Chemistry, Polymer and Rubber Technology program has received funding support from National Science, Research and Innovation Fund.
Sustainability 15(2023) 8755 [12] Li F-H, Hu H-J, Structure and Saccharification of Rice Straw Pretreated with Microwave-Assisted Dilute Lye.
J.5(2011) 6 [19] Zhu F, Composition, structure, physicochemical properties, and modifications of cassava starch.
This indicates the effective removal of surface wax and silica from the rice straw, confirming the isolation of lignin's chemical structure.
Acknowledgements The research project by Ubon Ratchathani University Department of Chemistry, Polymer and Rubber Technology program has received funding support from National Science, Research and Innovation Fund.
Sustainability 15(2023) 8755 [12] Li F-H, Hu H-J, Structure and Saccharification of Rice Straw Pretreated with Microwave-Assisted Dilute Lye.
J.5(2011) 6 [19] Zhu F, Composition, structure, physicochemical properties, and modifications of cassava starch.
Online since: June 2012
Authors: Wu Bin, Fan Chun
Ion transport in glassy polymer electrolytes including polymer backbones with same mesogenic chains can affect amorphous structure and relaxation at ambient temperature.
Cationic embedded in the chain-end oxygen attracted to the chain structure; on the contrary, there are only faint forces between the anions and atoms at the end of chains, it makes anions in the transfer process with a greater degree of freedom, chain structure of the space parameter would change for this cationic-anion Coulomb effect.
PVdF fiber membranes have a good absorption properties and good mechanical strength because it has three-dimensional network structure.
In this non-dispersed structure, ion mobility rate relate to the diffusion layer.
Elect roanalyt ical Chemistry, 1999, 463: 248~ 252
Cationic embedded in the chain-end oxygen attracted to the chain structure; on the contrary, there are only faint forces between the anions and atoms at the end of chains, it makes anions in the transfer process with a greater degree of freedom, chain structure of the space parameter would change for this cationic-anion Coulomb effect.
PVdF fiber membranes have a good absorption properties and good mechanical strength because it has three-dimensional network structure.
In this non-dispersed structure, ion mobility rate relate to the diffusion layer.
Elect roanalyt ical Chemistry, 1999, 463: 248~ 252
Online since: August 2013
Authors: George Ting Kuo Fey, Kai Pin Huang, Po Yu Peng, Yi Chuan Lin, Yung Da Cho, Hsien Ming Kao
Effect of Antimony Doping on the Properties of a Green Energy Cathode Material LiFePO4 for Lithium ion Batteries
George Ting-Kuo Fey1, a, Kai-Pin Huang1, b, Po-Yu Peng1, c, Yi-Chuan Lin1, d, Yung-Da Cho1, e, and Hsien-Ming Kao2, f
1Department of Chemical and Materials Engineering, National Central University, Chung-Li, Taiwan 32054, R.O.C.
2Department of Chemistry, National Central University, Chung-Li, Taiwan 32054, R.O.C.
The doped cathode materials are also characterized by a XRD technique for structure analysis.
We used a powder X-ray diffractometer (XRD), Siemens D-5000, Mac Science MXP18, equipped with a nickel-filtered Cu K radiation source (λ= 1.5405 A), to analyze the structure of materials.
No impurity phase was found in LiFe1-xSbxPO4/C synthesized below 873 K, indicating the original olivine structure remained crystalline and intact during the doping process [22].
The doped cathode materials are also characterized by a XRD technique for structure analysis.
We used a powder X-ray diffractometer (XRD), Siemens D-5000, Mac Science MXP18, equipped with a nickel-filtered Cu K radiation source (λ= 1.5405 A), to analyze the structure of materials.
No impurity phase was found in LiFe1-xSbxPO4/C synthesized below 873 K, indicating the original olivine structure remained crystalline and intact during the doping process [22].
Online since: June 2008
Authors: Lei Jiang, Cong Li, Xun Cheng Wu
The structure of the processor and the operating parameters were taken into account in the model.
This figure shows the structure of heater, processor, catalysts, etc.
In the model, the dimensions of the processor can be simplified to two-dimensions due to the symmetric structure.
Chemistry Reaction Model.
This figure shows the structure of heater, processor, catalysts, etc.
In the model, the dimensions of the processor can be simplified to two-dimensions due to the symmetric structure.
Chemistry Reaction Model.
Online since: June 2015
Authors: Elvia Leal, Joelda Dantas, Patrícia Tatiana de Araújo Santos, Sheyla Maria de Castro Máximo Bicalho, Dámiana Máximo Brandão, A.C.F. de M. Costa
Overlooking that, the proposal is to obtain the hybrid NiFe2O4/SiO2 from the surface modifying with the 3-aminopropyltriethoxysilane, and evaluate the structure, morphology and cytotoxicity, to obtain a biocompatible hybrid for biological applications, such as, e.g., drug carrier.
It has an inverse spinel structure showing ferrimagnetism that originates from magnetic moment of anti-parallel spins between Fe3+ ions at tetrahedral sites and Ni2+ ions at octahedral sites [8].
Nickel ferrite (NiFe2O4) was synthesized by combustion reaction according to the stoichiometry established by the concept of the chemistry of propellants and explosives [10].
According to Fig.1, it was observed that both samples showed the formation of single phase of NiFe2O4 spinel, indicating that the combustion synthesis reaction was efficient for the complete formation of the desired phase, and that the silanization process did not exercised great influence on the material structure, since its peaks remained almost the same intensity, but with a bit of noise due to the presence of the silane agente, which has amorphous characteristic, and thus tends to interfere in the crystallinity of the magnetic nanoparticles.
It has an inverse spinel structure showing ferrimagnetism that originates from magnetic moment of anti-parallel spins between Fe3+ ions at tetrahedral sites and Ni2+ ions at octahedral sites [8].
Nickel ferrite (NiFe2O4) was synthesized by combustion reaction according to the stoichiometry established by the concept of the chemistry of propellants and explosives [10].
According to Fig.1, it was observed that both samples showed the formation of single phase of NiFe2O4 spinel, indicating that the combustion synthesis reaction was efficient for the complete formation of the desired phase, and that the silanization process did not exercised great influence on the material structure, since its peaks remained almost the same intensity, but with a bit of noise due to the presence of the silane agente, which has amorphous characteristic, and thus tends to interfere in the crystallinity of the magnetic nanoparticles.
Online since: September 2013
Authors: Jun Hong Guo, Jin Feng Cui, Shu Hui Li, Xue Mei Bao, Xiang Ming Yao, Jun Hong Jia, Bao Ping Yang
The chemical structure and morphology of the Ag nanoparticles and self-assembled film were investigated by AFM, XRS and IR.
The chemical structure and morphology of the Ag nanoparticles and self-assembled film were investigated by AFM, XRS and IR, the macroscopic and microscopic tribological properties of the film with different assembly time was investigated by DF-PM static-kinetic friction coefficient of precision apparatus.
[3] Wu H, Lv W G, Guo Y, Research and development of silver nanoparticles and nano-structured film, Vacuum and Cryogenics, 2000, 4, 187-192
[7] Wang Y H, Zhou J, Wang T, Preparation and characterization of a stable dispersion of nano- silver sol, Journal of Inorganic Chemistry, 2007, 14, 1486-1489
The chemical structure and morphology of the Ag nanoparticles and self-assembled film were investigated by AFM, XRS and IR, the macroscopic and microscopic tribological properties of the film with different assembly time was investigated by DF-PM static-kinetic friction coefficient of precision apparatus.
[3] Wu H, Lv W G, Guo Y, Research and development of silver nanoparticles and nano-structured film, Vacuum and Cryogenics, 2000, 4, 187-192
[7] Wang Y H, Zhou J, Wang T, Preparation and characterization of a stable dispersion of nano- silver sol, Journal of Inorganic Chemistry, 2007, 14, 1486-1489
Online since: October 2014
Authors: Qi Bao Zhu, Bing Kun Xiang, Ye Yang, Zhao Sheng Meng, Dun Weng Zuo, Shi Jie Wang
The electrode process was analyzed and the morphology, composition and structure of the films were studied by scanning electron microscopy (SEM) and Raman spectroscopy respectively.
Especially the copper, it is one of the vital catalysts in organic chemistry on one hand, and has good performance of lubricity, thermal conductivity on the other hand.
The morphologies of the films were characterized by scanning electron microscope(SEM, JSM-6360LV).The structure of the films were studied by Raman spectrometer(Labram HR800) using 514nm of argon ion laser with resolution smaller than 1 cm-1 and its scanning range is 1100~1800cm-1.
For the purpose of further understanding the composition and structure of the films, the Raman spectrum of the samples are Gaussian fitted and relevant parameters are listed in table 1.
Especially the copper, it is one of the vital catalysts in organic chemistry on one hand, and has good performance of lubricity, thermal conductivity on the other hand.
The morphologies of the films were characterized by scanning electron microscope(SEM, JSM-6360LV).The structure of the films were studied by Raman spectrometer(Labram HR800) using 514nm of argon ion laser with resolution smaller than 1 cm-1 and its scanning range is 1100~1800cm-1.
For the purpose of further understanding the composition and structure of the films, the Raman spectrum of the samples are Gaussian fitted and relevant parameters are listed in table 1.
Online since: February 2014
Authors: Priyo Sardjono, Ari Adi Wisnu
The magnetic structure of based-manganite materials depend on the forming of raw materials.
LaMnO3 structure arranged anti-ferromagnetic very stable.
While La0.8Ba0.2MnO3 structure is arranged ferromagnetic.
Li., Attractive microwave-absorbing properties of La1−xSrxMnO3 manganite powders, Materials Chemistry and Physics 75 (2002)
Ferromagnetic Compounds of Manganese with Perovskite Structure, Phys.
LaMnO3 structure arranged anti-ferromagnetic very stable.
While La0.8Ba0.2MnO3 structure is arranged ferromagnetic.
Li., Attractive microwave-absorbing properties of La1−xSrxMnO3 manganite powders, Materials Chemistry and Physics 75 (2002)
Ferromagnetic Compounds of Manganese with Perovskite Structure, Phys.
Online since: August 2011
Authors: Zhong Liang Lu, Di Chen Li
At present, nickel base superalloy used in high-temperature parts of engine has the limited operating temperature, which is usually less than 1100℃, and then complex structure is designed for cooling hollow turbine blade by air or fluid.
Hence, it is the key to form complex structure performs of fiber reinforced polymer composite by the FP technique for manufacturing continuous fiber toughing ceramics parts, and it is necessary to investigate deeply FP forming mechanism, forming material and curing method.
Under the condition of the development of polymer chemistry and material science, it is feasible to realize the net shape of SiC ceramics based composite parts [15], so it is significant to manufacture continuous fiber toughing SiC ceramics parts with complex structure by integrating SS with FP and CVI techniques.
However, there are no reports on integrating the SS techniques for manufacturing continuous fiber toughing SiC parts with complex structure.
Finally, a kind of advanced manufacturing method and related theory will be supplied for manufacturing complex structure and high tenacity parts of SiC ceramics based composite.
Hence, it is the key to form complex structure performs of fiber reinforced polymer composite by the FP technique for manufacturing continuous fiber toughing ceramics parts, and it is necessary to investigate deeply FP forming mechanism, forming material and curing method.
Under the condition of the development of polymer chemistry and material science, it is feasible to realize the net shape of SiC ceramics based composite parts [15], so it is significant to manufacture continuous fiber toughing SiC ceramics parts with complex structure by integrating SS with FP and CVI techniques.
However, there are no reports on integrating the SS techniques for manufacturing continuous fiber toughing SiC parts with complex structure.
Finally, a kind of advanced manufacturing method and related theory will be supplied for manufacturing complex structure and high tenacity parts of SiC ceramics based composite.