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Online since: February 2014
Authors: Masaaki Nagatsu, Teguh Endah Saraswati, Shun Tsumura
Covalent Functionalization of Amino Group onto Carbon-Based Magnetic Nanoparticles Using Pulsed-Powder Explosion Technique
Teguh Endah Saraswati1,a, Shun Tsumura2 and Masaaki Nagatsu3,b
1Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Jalan Ir.
The surface structure analysis by a high resolution-transmission electron microscopy showed no significant damages were found on the nanoparticles, indicating that the present technique is suitable mainly for surface modification of powder materials without bringing any damages on their structural and morphological surface.
In final analysis, TEM images presented in Fig. 3 confirmed no damage or destruction was observed on the nanoparticles structure after performing the plasma treatment in both the nonbiasing and biasing system.
The structure of graphite layers was found to be stable under all experimental conditions.
In addition, analysis by the HR-TEM showed no significant damage were observed on the nanoparticle structures, denoting that the present technique is suitable for the surface modification of powder nanoparticles without causing any significant change or destruction of the structural and morphological properties.
The surface structure analysis by a high resolution-transmission electron microscopy showed no significant damages were found on the nanoparticles, indicating that the present technique is suitable mainly for surface modification of powder materials without bringing any damages on their structural and morphological surface.
In final analysis, TEM images presented in Fig. 3 confirmed no damage or destruction was observed on the nanoparticles structure after performing the plasma treatment in both the nonbiasing and biasing system.
The structure of graphite layers was found to be stable under all experimental conditions.
In addition, analysis by the HR-TEM showed no significant damage were observed on the nanoparticle structures, denoting that the present technique is suitable for the surface modification of powder nanoparticles without causing any significant change or destruction of the structural and morphological properties.
Online since: December 2012
Authors: Hassan Zainuriah, A.S. Obaid, M.A. Mahdi
The structure of the nanocrystalline PbS thin films was determined by X-ray diffraction (XRD).
The structure of the PbS thin films was determined by X-ray diffraction (XRD) within the angle 2θ angle of 20° to 60°.
Both PbS nanopowder and the thin films have rock salt (NaCl) type structures.
The lattice constant of the PbS powder and nanocrystalline thin films were calculated by the relation for the cubic phase structure using the following relation [10]: a=d(h2+k2+l2)12 (2) where h, k, and l are the Miller indices, and d is the interplanar spacing.
Kumar, M.Neumann-Spallartm, and C.Levy: J of Electroanalytical Chemistry Vol. 436 (1997), p. 49-52
The structure of the PbS thin films was determined by X-ray diffraction (XRD) within the angle 2θ angle of 20° to 60°.
Both PbS nanopowder and the thin films have rock salt (NaCl) type structures.
The lattice constant of the PbS powder and nanocrystalline thin films were calculated by the relation for the cubic phase structure using the following relation [10]: a=d(h2+k2+l2)12 (2) where h, k, and l are the Miller indices, and d is the interplanar spacing.
Kumar, M.Neumann-Spallartm, and C.Levy: J of Electroanalytical Chemistry Vol. 436 (1997), p. 49-52
Online since: November 2011
Authors: Yong Qing Zhai, Ya Hong Liu, Zhi Jiang You, Jing Qiao, Man De Qiu
Synthesis and Luminescence Properties of Blue Phosphors Sr3MgSi2O8:Eu2+ by Gel-Combustion Method
Yongqing Zhai1, a, Yahong Liu1, Zhijiang You1, Jing Qiao1, Mande Qiu1
1College of Chemistry and Environmental Science, Hebei University, Baoding, Hebei, 071002, P.R.
The results indicate that Sr3MgSi2O8:Eu2+ phosphors have orthorhombic crystal structure.
Introduction Silicates are good hosts with stable crystal structure, high physical and chemical stability, strong water-persistent and so on.
In these patterns, the peaks of compounds of Eu can not be found, which proves that Eu had entered the Sr3MgSi2O8 crystal lattice and had little effect on the crystal structure of the host.
XRD pattern indicates that Sr3MgSi2O8:Eu2+ phosphors have orthorhombic crystal structure.
The results indicate that Sr3MgSi2O8:Eu2+ phosphors have orthorhombic crystal structure.
Introduction Silicates are good hosts with stable crystal structure, high physical and chemical stability, strong water-persistent and so on.
In these patterns, the peaks of compounds of Eu can not be found, which proves that Eu had entered the Sr3MgSi2O8 crystal lattice and had little effect on the crystal structure of the host.
XRD pattern indicates that Sr3MgSi2O8:Eu2+ phosphors have orthorhombic crystal structure.
Online since: June 2019
Authors: Angela Repanovici, Diana Cotoros, Anca Stanciu
The other substances have no significant influence upon the material structure.
Using a digital microscope and a 50x magnifying factor, the images in fig.2 a (initial structure), 2 b after immersion in saline water and 2 c (material structure after immersion in cooking oil) show the changes of the sample.
As far as the silicone gel orthotic device without fabric coating is concerned, we found that cooking oil is again the worst substance for the structure integrity, as shown in fig.3, the other substances do not affect the structure or color of the material.
Though it was expected that tap water which is a harmless substance would not affect too much the material, in the case of elastic bandage the structure will be hugely modified, it loses elasticity, changes color and also structure.
Experiments were performed within the Chemistry laboratory of Transilvania University and the Advanced Mechatronic Systems laboratory of the university research institute.
Using a digital microscope and a 50x magnifying factor, the images in fig.2 a (initial structure), 2 b after immersion in saline water and 2 c (material structure after immersion in cooking oil) show the changes of the sample.
As far as the silicone gel orthotic device without fabric coating is concerned, we found that cooking oil is again the worst substance for the structure integrity, as shown in fig.3, the other substances do not affect the structure or color of the material.
Though it was expected that tap water which is a harmless substance would not affect too much the material, in the case of elastic bandage the structure will be hugely modified, it loses elasticity, changes color and also structure.
Experiments were performed within the Chemistry laboratory of Transilvania University and the Advanced Mechatronic Systems laboratory of the university research institute.
Online since: May 2011
Authors: Sanchitha Fernando, Tang Min, Rahul Agarwal, Lynn Khine, Kia Hian Lau, Ming Lin Julius Tsai, Jeffrey B.W. Soon
A schematic diagram of the proposed structure is shown in Fig. 1.
Furthermore, the actuator may be realized either as a mono-morph structure (one piezoelectric layer), bimorph structure, or a polymorph structure.
As can be seen from Table 1, The IME structure achieves low initial deformations, in the range of 1 µm, comparable with the Tsinghua University structure, but poorer than the Toshiba structure which achieves 0.3µm.
The 0.1µm variation of initial deformation of the IME structure with change of residual stress levels from 50MPa to 80MPa is comparable with the Toshiba structure, and much better than the 0.4µm variation of the Tsinghua structure.
A SiO2 hard mask layer is then patterned to protect the AlN layer during dry etching with Cl2/BCl3/Ar chemistry.
Furthermore, the actuator may be realized either as a mono-morph structure (one piezoelectric layer), bimorph structure, or a polymorph structure.
As can be seen from Table 1, The IME structure achieves low initial deformations, in the range of 1 µm, comparable with the Tsinghua University structure, but poorer than the Toshiba structure which achieves 0.3µm.
The 0.1µm variation of initial deformation of the IME structure with change of residual stress levels from 50MPa to 80MPa is comparable with the Toshiba structure, and much better than the 0.4µm variation of the Tsinghua structure.
A SiO2 hard mask layer is then patterned to protect the AlN layer during dry etching with Cl2/BCl3/Ar chemistry.
Online since: March 2007
Authors: Piet Peters, Joerg Hemptenmacher, Hartmut Schurmann
In the next sections structure and properties of
SiC-fibre reinforced titanium alloys are discussed.
On the right hand side of the graph the structure is lamellar and originates from the tube material, which is a forged alloy.
The fine-grained structure of the titanium alloy gives rise to a high yield and tensile strength of the matrix.
As for the titanium MMC the sputtered Cu-alloy shows a finer grained structure, than the structure of the tube material produced from the as-delivered copper plates.
[8] Brendel, A., Woltersdorf, J., Pippel, E., Bolt, H., "Titanium as coupling agent in SiC fibre reinforced copper matrix composites," Materials Chemistry and Physics, Vol. 91, 2005, pp. 116-123
On the right hand side of the graph the structure is lamellar and originates from the tube material, which is a forged alloy.
The fine-grained structure of the titanium alloy gives rise to a high yield and tensile strength of the matrix.
As for the titanium MMC the sputtered Cu-alloy shows a finer grained structure, than the structure of the tube material produced from the as-delivered copper plates.
[8] Brendel, A., Woltersdorf, J., Pippel, E., Bolt, H., "Titanium as coupling agent in SiC fibre reinforced copper matrix composites," Materials Chemistry and Physics, Vol. 91, 2005, pp. 116-123
Online since: August 2019
Authors: Ning Guan, Xiao Jing Yuan, Xiao Hu Chen, Xian Yu Zhang
The scale of the element is infinitesimal relative to the macro-scale of the structure, so the heterogeneity of the structure is meso-level.
However, the variation of the geometric composition of the micro-structure can be considered to be small in the scale neighborhood of the micro-structure at some point.
Under the heterogeneous structure, the Poisson's ratio, elastic modulus and other basic material parameters of the coating are closely related to the heterogeneous structure.
Due to the heterogeneous structure, the stress and strain of the wc/co coating structure will occur in the mesoscopic field.
Materials Chemistry and Physics [J], 2013, 1421.: 165-171 [16] Qing Zhan, Ligen Yu, Fuxing Ye, Qunji Xue, Hua Li.
However, the variation of the geometric composition of the micro-structure can be considered to be small in the scale neighborhood of the micro-structure at some point.
Under the heterogeneous structure, the Poisson's ratio, elastic modulus and other basic material parameters of the coating are closely related to the heterogeneous structure.
Due to the heterogeneous structure, the stress and strain of the wc/co coating structure will occur in the mesoscopic field.
Materials Chemistry and Physics [J], 2013, 1421.: 165-171 [16] Qing Zhan, Ligen Yu, Fuxing Ye, Qunji Xue, Hua Li.
Online since: February 2015
Authors: Wen Long Li, Bin Guo, Wei Jie Hu, Ming De Chen, Hong Zhang, Hao Jing Wang
Fig. 1 The structure of perovskite [8]
Fouquet etc. [8] studied of its structure and found that it was solid solution, whose crystal structure was the quartet structure, and its space group was P4/mmm, when it was under the condition of 0.06When the oxygen ions in the perovskite above-mentioned was replaced by polyion, the perovskite became into a NASICON structure.
In 1977, a newly designed high lithium conductor based on a phosphate structure similar to NASICON was found [12].
The Garnet structure is a silicate mineral structure, and its molecular formula can written as A3B2 (SiO4)3.Thangadura et al. [20] found the new solid electrolyte Li5La3M2O12 with Garnet structure (M=Ta, Nb), which exhibits higher ionic conductivity and wide electrochemical window.
[8] Fourquet J L, Durov H and Crosnier-Lopez M P: Journal of Solid State Chemistry, Vol. 127 (1996) No.2, p.283
In 1977, a newly designed high lithium conductor based on a phosphate structure similar to NASICON was found [12].
The Garnet structure is a silicate mineral structure, and its molecular formula can written as A3B2 (SiO4)3.Thangadura et al. [20] found the new solid electrolyte Li5La3M2O12 with Garnet structure (M=Ta, Nb), which exhibits higher ionic conductivity and wide electrochemical window.
[8] Fourquet J L, Durov H and Crosnier-Lopez M P: Journal of Solid State Chemistry, Vol. 127 (1996) No.2, p.283
Online since: March 2013
Authors: Jun Chen Xu, Quan Zhong Liu
(1) Consolidated agentZL-1 corrode clay mineral and make vice of mineral crystal surface, and accelerate chemistry reaction between lime and mineral with crystal vice.
It forms net framework structure with increasing of shared boundary gradually
This structure also has better anti-freezing-thawing performance.
This structure also has better anti-freezing-thawing performance
It can form structure that is compacter , water-steadier higher-strength.
It forms net framework structure with increasing of shared boundary gradually
This structure also has better anti-freezing-thawing performance.
This structure also has better anti-freezing-thawing performance
It can form structure that is compacter , water-steadier higher-strength.
Online since: October 2007
Authors: Tomotsugu Shimokawa, Toshiyasu Kinari, Sukenori Shintaku
Methodology
Fig. 1(a) shows hexagonal-close-packed (hcp) crystal structure.
The local atomic structure, i.e., fcc and defect structures, is distinguished by using the common neighbor analysis method [4].
Here, light and dark gray atoms represent the hcp and defect structures, respectively.
Light and dark gray atoms represent the hcp and defect structures, respectively.
Andersen: The Journal of Physical Chemistry Vol.91 (1987), p.4950
The local atomic structure, i.e., fcc and defect structures, is distinguished by using the common neighbor analysis method [4].
Here, light and dark gray atoms represent the hcp and defect structures, respectively.
Light and dark gray atoms represent the hcp and defect structures, respectively.
Andersen: The Journal of Physical Chemistry Vol.91 (1987), p.4950