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Online since: May 2011
Authors: Yan Yan Liu, Yan Ping Ban, Lu Sheng Chen, Huai Xiang Li
Porous Silicon Modification with ZnO Films Electro-deposited from Zinc Nitrate Aqueous Solution by Pulsed Current of Rectangular Wave
Lusheng Chen1,a Yanyan Liu1,b,Yanping Ban1,c, Huaixiang Li1,d
1College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P.R.
Works have been done to modify the PSi surface with noble metal[16], metal oxide[17] or carbon nanotubes [18] by physical or chemical vapor deposition, but these methods cannot provide an ideal electric contact with the PSi internal surface due to the complicated structure of PSi.
All the diffraction peaks were assigned to those for ZnO with wurtzite structure[33] and any peaks attributed to ITO or PSi substrate could not be bserved.
The measurements of x-ray diffractions demonstrate that the ZnO films on the surface of PSi and ITO glass plate have a wurtzite structure.
Works have been done to modify the PSi surface with noble metal[16], metal oxide[17] or carbon nanotubes [18] by physical or chemical vapor deposition, but these methods cannot provide an ideal electric contact with the PSi internal surface due to the complicated structure of PSi.
All the diffraction peaks were assigned to those for ZnO with wurtzite structure[33] and any peaks attributed to ITO or PSi substrate could not be bserved.
The measurements of x-ray diffractions demonstrate that the ZnO films on the surface of PSi and ITO glass plate have a wurtzite structure.
Online since: January 2024
Authors: Ahmad Nuruddin, Damar Rastri Adhika, Aulia Ghifari Nurlis, Yulian Aska, Arfat Pradana
ZnS material is one of the best n-type semiconductors with a cubic and hexagonal crystal structure.
The NIL process requires a stamp that already has a nanopattern structure.
Each optical disc, NIL Stamp, and LED were characterized using a Scanning Electron Microscope (SEM) to determine the morphological structure of the two polycarbonate layers.
Chiou, “Enhancing LED light extraction by optimizing cavity and waveguide modes in grating structures.,” Journal of Display Technology, pp. 9(5), 359-364., 2013
Klinke, “From Wurtzite nanoplatelets to zinc blende nanorods: simultaneous control of shape and phase in Ultrathin ZnS nanocrystals.,” The journal of physical chemistry letters, pp. 10(14), 3828 - 3825, 2019
The NIL process requires a stamp that already has a nanopattern structure.
Each optical disc, NIL Stamp, and LED were characterized using a Scanning Electron Microscope (SEM) to determine the morphological structure of the two polycarbonate layers.
Chiou, “Enhancing LED light extraction by optimizing cavity and waveguide modes in grating structures.,” Journal of Display Technology, pp. 9(5), 359-364., 2013
Klinke, “From Wurtzite nanoplatelets to zinc blende nanorods: simultaneous control of shape and phase in Ultrathin ZnS nanocrystals.,” The journal of physical chemistry letters, pp. 10(14), 3828 - 3825, 2019
Online since: July 2022
Authors: Felix Frölich, Luise Kärger
The integration of local metal structures into polymer components using Laser Powder Bed
Fusion (PBF-LB/M) offers great potential regarding multifunctional lightweight structures.
Integration of local metal structures by the PBFLB/M process into polymer components would allow a wide range of function integrations as well as a large design freedom of hybrid metal-polymer structures [4].
The printing of polymers on metal structures has already been investigated and researched [4, 5, 6].
The model structure with dimensions as well as the local discretization can be seen in Fig. 3.
Sahoo, "Sintering of AlSi10Mg particles in direct metal laser sintering process: A molecular dynamics simulation study," Materials Chemistry and Physics, vol. 236, no.
Integration of local metal structures by the PBFLB/M process into polymer components would allow a wide range of function integrations as well as a large design freedom of hybrid metal-polymer structures [4].
The printing of polymers on metal structures has already been investigated and researched [4, 5, 6].
The model structure with dimensions as well as the local discretization can be seen in Fig. 3.
Sahoo, "Sintering of AlSi10Mg particles in direct metal laser sintering process: A molecular dynamics simulation study," Materials Chemistry and Physics, vol. 236, no.
Online since: August 2022
Authors: Yasir Nawab, Muhammad Shahid, Arif Ali Shah, Naveed Ahmed Siddiqui
Researchers fabricated various geometric structures of auxetic yarns, however, their study mainly focused on the structure, fabrication techniques and characterization.
Sai Liu et al. [23] fabricated a interlaced helical yarn (IHY); the two-component yarn with helical wrapping structure exhibited auxetic behaviour with a unique performance having a relatively higher stable structure.
A braider machine was used to fabricate and achieve a stable regular yarn structure.
Alderson, Auxetic materials: Functional materials and structures from lateral thinking.
Evans, Novel tensile properties of helical auxetic structures: a numerical Study.
Sai Liu et al. [23] fabricated a interlaced helical yarn (IHY); the two-component yarn with helical wrapping structure exhibited auxetic behaviour with a unique performance having a relatively higher stable structure.
A braider machine was used to fabricate and achieve a stable regular yarn structure.
Alderson, Auxetic materials: Functional materials and structures from lateral thinking.
Evans, Novel tensile properties of helical auxetic structures: a numerical Study.
Online since: September 2016
Authors: Antonio Naani, Federica Lollini, Maddalena Carsana, Matteo Gastaldi, Elena Redaelli, Luca Bertolini
At the moment the use of seawater and salt-contaminated aggregates is prohibited for reinforced concrete (RC) structures.
Thus, design standards worldwide aim at preventing both the use of chloride-contaminated materials and the further penetration of chloride during the service life of the structure.
For a structure exposed to a chloride-bearing environment, the initiation period is defined as the time required for chlorides to reach a critical threshold at the depth of the outermost steel bars.
Bertolini, The challenge of the performance-based approach for the design of reinforced concrete structures in chloride bearing environment, Constr.
Bertolini, Performance-based durability design of concrete structures reinforced with stainless steel bars, 3rd Workshop on The new boundaries of Structural Concrete, Bergamo 3-4 October 2013.
Thus, design standards worldwide aim at preventing both the use of chloride-contaminated materials and the further penetration of chloride during the service life of the structure.
For a structure exposed to a chloride-bearing environment, the initiation period is defined as the time required for chlorides to reach a critical threshold at the depth of the outermost steel bars.
Bertolini, The challenge of the performance-based approach for the design of reinforced concrete structures in chloride bearing environment, Constr.
Bertolini, Performance-based durability design of concrete structures reinforced with stainless steel bars, 3rd Workshop on The new boundaries of Structural Concrete, Bergamo 3-4 October 2013.
Online since: March 2022
Authors: Isna Syauqiah, Muthia Elma, Putri Vidiasari Darsono, Nur Hidayah
The adsorber membrane is activated to form a porous structure and a usable surface area for gas separation.
According to Yakout and El-Deen, the pore structure formed comes from the evaporation and dissolution of non-carbon compounds contained in the raw material caused by the pyrolysis process or physical activation [12].
Arabian journal of chemistry, 9 (2016): S1155-S1162
According to Yakout and El-Deen, the pore structure formed comes from the evaporation and dissolution of non-carbon compounds contained in the raw material caused by the pyrolysis process or physical activation [12].
Arabian journal of chemistry, 9 (2016): S1155-S1162
Online since: November 2011
Authors: Shui Yang Zou, You Yuan Shao
Synergistic Effect between Cellulase and Xylanase
Acting on Alkaline Pretreated Rice Straw
Shuiyang Zou 1, a, Youyuan Shao 1, b
1College of Chemistry and Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
azousy@dgut.edu.cn, bshaoyouyuan@163.com
Keywords: lignocellulose, saccharification, cellulase, xylanase, synergy.
However, lignocellulose in nature is of difficulty for enzymatic hydrolysis due to its complex structure and chemical resistance.
An explanation of the enzymatic saccharification graphs needs to take into consideration of factors like substrate structure and enzymatic dynamics.
Further studying the synergistic actions may be helpful to better comprehend the structure of lignocellulose and the mechanism of enzymatic degradation.
However, lignocellulose in nature is of difficulty for enzymatic hydrolysis due to its complex structure and chemical resistance.
An explanation of the enzymatic saccharification graphs needs to take into consideration of factors like substrate structure and enzymatic dynamics.
Further studying the synergistic actions may be helpful to better comprehend the structure of lignocellulose and the mechanism of enzymatic degradation.
Online since: September 2019
Authors: Dalibor Vojtěch, Drahomír Dvorský, Jaroslav Čapek, Jiří Kubásek, Jan Pinc
Characterization of Zn-1.5Mg and Zn-1.5Mg-0.5Ca Alloys Considered for Biomedical Application
Drahomír Dvorský1*, Jiří Kubásek1, Jaroslav Čapek2, Jan Pinc2,
Dalibor Vojtěch1
1Department of Metals and Corrosion Engineering, University of Chemistry and Technology, Prague, Czech Republic
2Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
(*corresponding author: Drahomír Dvorský, tel.: +420220444055, e-mail: dvorskyd@vscht.cz)
Keywords: Zinc, magnesium, calcium, biodegradable materials, corrosion
Abstract.
This work is focused on the characterization and comparison of structure, mechanical properties and in vivo corrosion of biodegradable Zn-1.5Mg, Zn-1.5Mg-0.5Ca, and Mg-4Y-3RE (WE43) alloys.
Zn Mg Ca Y Nd Zr Zn-1.5Mg 98.4 1.6 - - - - Zn-1.5Mg-0.5Ca 98.1 1.5 0.4 - - - WE43 - 92.6 - 4.2 2.8 0.4 Structure and mechanical properties.
Ruml, Structure, mechanical characteristics and in vitro degradation, cytotoxicity, genotoxicity and mutagenicity of novel biodegradable Zn–Mg alloys.
This work is focused on the characterization and comparison of structure, mechanical properties and in vivo corrosion of biodegradable Zn-1.5Mg, Zn-1.5Mg-0.5Ca, and Mg-4Y-3RE (WE43) alloys.
Zn Mg Ca Y Nd Zr Zn-1.5Mg 98.4 1.6 - - - - Zn-1.5Mg-0.5Ca 98.1 1.5 0.4 - - - WE43 - 92.6 - 4.2 2.8 0.4 Structure and mechanical properties.
Ruml, Structure, mechanical characteristics and in vitro degradation, cytotoxicity, genotoxicity and mutagenicity of novel biodegradable Zn–Mg alloys.
Online since: March 2016
Authors: Ye Xin Chen, Xi Bei Hou, Tao Chen
(Fe,Ni)3V alloy and Ni3Fe alloy have same crystal structure (L12).
Because the hydrogen atom diffuses mainly along a grain boundary of (Fe,Ni)3V alloy, the effect of degree of ordered on the hydrogen diffusion may be attributed to the change of structure or chemistry of the grain boundary during the ordering treatment.
Chen, Effect of B content on structure and mechanical properties of (Fe,Ni)3V alloy, J.
Because the hydrogen atom diffuses mainly along a grain boundary of (Fe,Ni)3V alloy, the effect of degree of ordered on the hydrogen diffusion may be attributed to the change of structure or chemistry of the grain boundary during the ordering treatment.
Chen, Effect of B content on structure and mechanical properties of (Fe,Ni)3V alloy, J.