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Online since: March 2017
Authors: Wen Deng, Wen Chun Zhang, Li Xia Li, Ding Kang Xiong, Shou Lei Xu, Yu Yang Huang
The Fe64Ni30Co6 alloy is a mixture of BCC and FCC structures.
That is, the Fe64Ni30Co6 alloy is a mixture of BCC and FCC structures.
With the Co content increasing in Fe64Ni36-xCox alloys, the intensities of the XRD peaks corresponding to the BCC structure increase, while those corresponding to the FCC structure decrease.
Conclusions (1) The Fe64Ni30Co6 alloy is a mixture of BCC and FCC structures.
Dodd, Martensitic transformation and invar effect in Fe-Ni-Co alloys, Materials Chemistry and Physics, 30 (1991) 115-119
That is, the Fe64Ni30Co6 alloy is a mixture of BCC and FCC structures.
With the Co content increasing in Fe64Ni36-xCox alloys, the intensities of the XRD peaks corresponding to the BCC structure increase, while those corresponding to the FCC structure decrease.
Conclusions (1) The Fe64Ni30Co6 alloy is a mixture of BCC and FCC structures.
Dodd, Martensitic transformation and invar effect in Fe-Ni-Co alloys, Materials Chemistry and Physics, 30 (1991) 115-119
Online since: January 2013
Authors: Jeong Woo Choi
The redox properties of immobilized recombinant azurin were validated with cyclic voltammetry (CV), and memory functions using various metalloprotein structures were confirmed by the technique of open circuit potential amperometry (OCPA).
Especially, continuous electron transfer in the reaction of metalloprotein and enzyme, which utilized for energy conversion and information transfer in various biological system, have been widely noticed in several research fields including chemistry and biology.
Metalloproteins have metal ions in the core of their structures, which can transfer electrons by oxidation and reduction.
Azurin was modified with cysteine residue by recombinant DNA technology for the attachment of thiol functional group within the protein structure.
Recombinant DNA technology was utilized to modify azurin structure for direct immobilization without chemical linkers, and metal ions in the core of azurin were exchanged to demonstrate the multi-functions by biological technology.
Especially, continuous electron transfer in the reaction of metalloprotein and enzyme, which utilized for energy conversion and information transfer in various biological system, have been widely noticed in several research fields including chemistry and biology.
Metalloproteins have metal ions in the core of their structures, which can transfer electrons by oxidation and reduction.
Azurin was modified with cysteine residue by recombinant DNA technology for the attachment of thiol functional group within the protein structure.
Recombinant DNA technology was utilized to modify azurin structure for direct immobilization without chemical linkers, and metal ions in the core of azurin were exchanged to demonstrate the multi-functions by biological technology.
Online since: January 2005
Authors: Akihisa Inoue, Kanryu Inoue, Shojiro Ochiai, Hiroshi Okuda, Isao Murase, Ryoichi Kurosaki, Y. Yokoyama
For such applications as a structural component, it is sometimes quite important to
provide a reliable joint structure.
In contrast, the microstructural heterogeneities expected in a welded metallic glass should be much more complex, since the structure change might include phase separation, crystallization, and even relaxation of glass structure.
This suggests that the fluctuation of the structure giving the power law scattering is enhanced by clustering, although the power, n, remains the same as that without clustering.
To examine the structure change of the annealed Zr glass, simultaneous SWAXS, with the use of wide angle diffraction at the same time, is now under development as a present extension.
Schmidt, The Fractal Approach to Heterogeneous Chemistry, ed.
In contrast, the microstructural heterogeneities expected in a welded metallic glass should be much more complex, since the structure change might include phase separation, crystallization, and even relaxation of glass structure.
This suggests that the fluctuation of the structure giving the power law scattering is enhanced by clustering, although the power, n, remains the same as that without clustering.
To examine the structure change of the annealed Zr glass, simultaneous SWAXS, with the use of wide angle diffraction at the same time, is now under development as a present extension.
Schmidt, The Fractal Approach to Heterogeneous Chemistry, ed.
Online since: February 2012
Authors: Feng Xiu Zhang, Guang Xian Zhang, Hong Mei Ju, Lin Xiao Jing
They found the crystalline structure of artificial silking silk changed a little, and the molecular orientation increased a little.
Results and discussion Structure.
This showed the drown silk has mare oriented β-sheet crystalline structure.
This is maybe because the NaSCN etc effected the drown silk to get more crystal structure.
The FT-IR spectra, DSC and X-ray diffraction spectra showed the drown silk has more oriented β-sheet crystalline structure.
Results and discussion Structure.
This showed the drown silk has mare oriented β-sheet crystalline structure.
This is maybe because the NaSCN etc effected the drown silk to get more crystal structure.
The FT-IR spectra, DSC and X-ray diffraction spectra showed the drown silk has more oriented β-sheet crystalline structure.
Online since: November 2013
Authors: Qiang Li, Yue Tu, Lin Zhang, Jing Hui Cui, Fang Yu Zhou
Synthesis and Photochromic Properties of MOO3
Nanosheets Crystallites
Lin Zhang, Yue Tu, Jinghui Cui, Fangyu Zhou and Qiang Li*
Department of Chemistry, East China Normal University, Shanghai 200241, China
715zhanglin@163.com qli@chem.ecnu.edu.cn
Keywords: nanosheets; layered compound; Molybdenum trioxide; photochromic
Abstract: Layered Molybdenum trioxide MOO3, with a two-dimensional (2D) structure was successfully delaminated into colloidal nanosheets in n-butanol via a soft-chemical process involving intercalation of dodecylamine.
Introduction Molybdenum trioxides (MoO3) are important transition metaloxide with unique functional properties.[1] Nanostructured MoO3 materials have been intensively investigated and applied in smart windows,[2] gas sensors,[3–6] catalysts,[7–10] Li-ions batteries,[11–16] capacitors[17] and field emission devices.[18,19] There are basically two polytypic phases for MoO3: one is the thermodynamically stable orthorhombic MoO3 ( a-MoO3) phase,[20] and the other is the metastable monoclinic MoO3(β-MoO3) phase with a ReO3-type structure.[2,12] The α-MoO3 phase is of ananisotropic structure with layers parallel to the (010) crystal plane.[12] Each layer consists of two sublayers, and each sublayer is formed by corner-sharing octahedra along the [001] and [100] directions.[12] The two sublayers then stack together by sharing the edges of the octahedra along the [001] direction to form a layer.[6,12] These layers then alternately stack along the [010] direction to form an α-MoO3 structure, where
Which exhibit layered structure of MoO3 with interlayer spacing of 6.9Å.
All the intercalated composites show a lamellar structure.
As Fig. 3b shows, it is composed of a highly-ordered diffractional lattice with a large and homogeneous diffraction dot array,which suggests that the α-MoO3 nanoplate is of a single-crystal structure and has a thin and uniform thickness.
Introduction Molybdenum trioxides (MoO3) are important transition metaloxide with unique functional properties.[1] Nanostructured MoO3 materials have been intensively investigated and applied in smart windows,[2] gas sensors,[3–6] catalysts,[7–10] Li-ions batteries,[11–16] capacitors[17] and field emission devices.[18,19] There are basically two polytypic phases for MoO3: one is the thermodynamically stable orthorhombic MoO3 ( a-MoO3) phase,[20] and the other is the metastable monoclinic MoO3(β-MoO3) phase with a ReO3-type structure.[2,12] The α-MoO3 phase is of ananisotropic structure with layers parallel to the (010) crystal plane.[12] Each layer consists of two sublayers, and each sublayer is formed by corner-sharing octahedra along the [001] and [100] directions.[12] The two sublayers then stack together by sharing the edges of the octahedra along the [001] direction to form a layer.[6,12] These layers then alternately stack along the [010] direction to form an α-MoO3 structure, where
Which exhibit layered structure of MoO3 with interlayer spacing of 6.9Å.
All the intercalated composites show a lamellar structure.
As Fig. 3b shows, it is composed of a highly-ordered diffractional lattice with a large and homogeneous diffraction dot array,which suggests that the α-MoO3 nanoplate is of a single-crystal structure and has a thin and uniform thickness.
Online since: November 2007
Authors: Kazuyuki Hokamoto, Minoru Nishida, Mitsuhiro Matsuda, Shahin Khameneh Asl, Ryuichi Tomoshige, M. Heydarzadeh Sohi
TEM results of the heat treated specimens
showed that these new nucleated eta phases had very clear crystallographic structure without any
crystalline defects.
The main purpose of this investigation is to characterize the structure of WC-17Co heat treated coating via TEM studies.
Metallographical pictures were, then, taken and SAD patterns were extracted for distinguishing crystalline structures of the selected phase.
Results and discussion Figures 2a to 2d show TEM metallographical structures of WC-17Co sprayed coating after heat treatment at 1100°C.
On the other hand, W3Co3C phase (figure 2a and 2b) has not a uniform crystalline structure and it has a lot of defects like dislocations and stacking faults.
The main purpose of this investigation is to characterize the structure of WC-17Co heat treated coating via TEM studies.
Metallographical pictures were, then, taken and SAD patterns were extracted for distinguishing crystalline structures of the selected phase.
Results and discussion Figures 2a to 2d show TEM metallographical structures of WC-17Co sprayed coating after heat treatment at 1100°C.
On the other hand, W3Co3C phase (figure 2a and 2b) has not a uniform crystalline structure and it has a lot of defects like dislocations and stacking faults.
Online since: November 2011
Authors: Quan Xuan Zhang, Run Tao Dong, Ling Min Sun, Qing Bin Xue
Synthesis and Characterization of Poly (L-lactic acid) Containing the Azobenzene Mesogens
Run-tao Dong, Qing-bin Xuea, Ling-min Sun and Quan-xuan Zhang
College of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan
aqbxue@sdu.edu.cn
Keywords: Poly (L-lactic acid); Azobenzene; Thermal properties.
Poly L-Lactide can form chiral helical structure with thermodynamic and kinetic stability because of large numbers of chiral carbon atoms in the main chain part [1, 2, 3].
While helical structure is one of the basic polymeric chiral structures, which can not only devote the polymers huge optical rotatory power along the helix axis but also affect the stability of polymer and the optical activity closely related to the stable conformation of helical polymer structure.
Synthesis routine of the initiators and AZO-PLLA Results and Discussions Chemical structures and molecular weights determined by 1H NMR and GPC were listed in Table 1.
X-ray diffraction patterns of the corresponding phase shown in Figure 3 give strong support for the formation of layered mesophase structure and spherulites structure.
Poly L-Lactide can form chiral helical structure with thermodynamic and kinetic stability because of large numbers of chiral carbon atoms in the main chain part [1, 2, 3].
While helical structure is one of the basic polymeric chiral structures, which can not only devote the polymers huge optical rotatory power along the helix axis but also affect the stability of polymer and the optical activity closely related to the stable conformation of helical polymer structure.
Synthesis routine of the initiators and AZO-PLLA Results and Discussions Chemical structures and molecular weights determined by 1H NMR and GPC were listed in Table 1.
X-ray diffraction patterns of the corresponding phase shown in Figure 3 give strong support for the formation of layered mesophase structure and spherulites structure.
Online since: July 2017
Authors: Bastian Brück, Thomas Guglhoer, Simon Haug, Christina Kunzmann, Michael Schulz, Tanja Schneck, Johanna Spoerl, Michael R. Buchmeiser, Siegfried R. Horn, Wolfgang M. Mueller
The topography of a surface consists of structures of different length scales.
To quantify contributions of smaller structures to the roughness, a previous study presented a tunable local background correction, which eliminates structures on a larger than selected scale.
Their surface structure forms during their manufacturing process.
The smaller nano-structures where evaluated at an η value of 1.
Eilers, A Perfect Smoother, Analytical Chemistry 75 (2003) 3631–3636
To quantify contributions of smaller structures to the roughness, a previous study presented a tunable local background correction, which eliminates structures on a larger than selected scale.
Their surface structure forms during their manufacturing process.
The smaller nano-structures where evaluated at an η value of 1.
Eilers, A Perfect Smoother, Analytical Chemistry 75 (2003) 3631–3636
Online since: April 2009
Authors: Elti Cattaruzza, Francesco Gonella, Shahid Ali, Valentina Bello, Tiziana Cesca
A solid-state route for the synthesis of metal nanocluster composite
glasses
Elti Cattaruzza
1,a
, Francesco Gonella2,b
, Shahid Ali3,c, Valentina Bello3,d,
Tiziana Cesca3,e
1
Physical Chemistry Dept, Università Ca' Foscari Venezia, Dorsoduro 2137, I-30123 Venezia, Italy
2
Physical Chemistry Dept, Università Ca' Foscari Venezia, Dorsoduro 2137, I-30123 Venezia, Italy
3
CNISM, Physics Dept, Università di Padova, via Marzolo 8, I-35031 Padova, Italy
a
cattaruz@unive.it, bgonella@unive.it, cshahid@padova.infm.it, dbello@padova.infm.it,
e
cesca@padova.infm.it
Keywords: ion exchange; diffusion; nanoparticles; glass.
The diffusion and precipitation of gold ions within the matrix turned out to critically depend on the used glass, i.e. to its structure and composition.
Indeed, the ion exchanged region exhibits anyways quite an irregular structure.
The structure of the exchanged region of the sample appears much more homogeneous than for the exchanged SLG.
The particular structure and composition of BK7 allow to better control the diffusion and precipitation processes.
The diffusion and precipitation of gold ions within the matrix turned out to critically depend on the used glass, i.e. to its structure and composition.
Indeed, the ion exchanged region exhibits anyways quite an irregular structure.
The structure of the exchanged region of the sample appears much more homogeneous than for the exchanged SLG.
The particular structure and composition of BK7 allow to better control the diffusion and precipitation processes.
Online since: October 2013
Authors: Hui Yong Zhang
Nano Structures Constructed by AFM Based Lithography
Hui-yong ZHANG1,a
1Department of Materials Science and Engineering, Luoyang Institute of Science and Technology, Henan, Luoyang, 471023, China
azhanghuiyong187@163.com
Keywords: AFM, lithography, nano structure.
Tunneling current induced local oxidation reaction can prepare nano structured patterns.
Recently, the use of AFM-based nano-lithography has been proposed for machining material surface and fabricating nano-structure components, such as nano-patterning and nano-wire.
Steen,Submicron gold structures formed by atomic force microscopy lithography on thin films of poly(methyl methacrylate) Surface Science 602(2008) 3051-3056
Wu,ELECTROCHEMICAL STUDY OF THE INITIAL SURFACE CONDITION OF PLATINUM SURFACES WITH (100) AND (111) ORIENTATIONS Journal of Electroanalytical Chemistry 135(1982) 159-166
Tunneling current induced local oxidation reaction can prepare nano structured patterns.
Recently, the use of AFM-based nano-lithography has been proposed for machining material surface and fabricating nano-structure components, such as nano-patterning and nano-wire.
Steen,Submicron gold structures formed by atomic force microscopy lithography on thin films of poly(methyl methacrylate) Surface Science 602(2008) 3051-3056
Wu,ELECTROCHEMICAL STUDY OF THE INITIAL SURFACE CONDITION OF PLATINUM SURFACES WITH (100) AND (111) ORIENTATIONS Journal of Electroanalytical Chemistry 135(1982) 159-166