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Online since: June 2014
Authors: Luiz F. Cotica, Valdirlei F. Freitas, Daniel M. Silva, Karina Honjoya, Karen Honjoya, Ivair A. Santos, Verusca C.P. Fontanive, Najeh M. Khalil, Rubiana M. Mainardes, Erika S. Kioshima, Ruyan Guo, Amar S. Bhalla
The cobalt ferrite has excellent chemical and physical stability, but the success of its practical applications depends on the precise control over composition, structure, size and chemical stability [10].
The serum biochemical analyses were performed on the automated chemistry analyser BS-200 Mindray, using the appropriate chemistry reagents (Dialab® kit), protocols and controls.
X-ray diffraction measurements were performed to obtain information related to the structure and the microstructure of cobalt ferrite nanoparticles.
The observed diffraction peaks could be assigned to the crystallized cobalt ferrite (ICDD-JCPDS 001-1121) with inverted spinel structure (space group Fd3m) [13].
Bose, Structured materials syntheses in a self-assembled surfactant mesophase, Colloid Surface A 174 (2000) 275-281
Online since: June 2011
Authors: Li Ma, Ke Chao Zhou, Lei Zhang, Zhi You Li
Both surface and cross-section local EDX analyses (Fig.2(c) and (d)) demonstrate Fe2O3 particles are wrapped by Ni-Co deposits, especially embedded into the spherical-like structures.
For materials with the fcc structure, the surface free energy (γhkl) is given in as: (3) Where E is bond energy and d0 is bond length. λ represents the maximum value of the Miller indices, h, k and l.
Equation (3) shows the anisotropy of the surface free energy of different crystal planes with fcc structure and gives rise to the relationship γ100: γ110: γ111 =1::.
Materials Chemistry and Physics Vol. 115(2009), p.578 [4] Harris VG, Geiler A, Chen Y, Yoon SD, Wu M, Yang A, Chen Z, He P, Parimi PV, Zuo X, Patton CE, Abe M, Acher O, Vittoria C.
Materials Chemistry and Physic Vol. 86(2004), p.375 [15] Sartale SD, Lokhande CD, Giersig M, Ganesan V.
Online since: April 2010
Authors: Christian Brylinski, Daniel Alquier, Nicolas Thierry-Jebali, Olivier Ménard, Frédéric Cayrel
SiC Schottky rectifiers The schematic structure of the simplest reliable SiC Schottky rectifier structure is recalled on figure 1.
Ga� Schottky rectifiers Today, GaN Schottky rectifier structures very similar to the existing SiC ones (fig.1) can be fabricated at the laboratory stage.
However, for plain GaN structures such as Schottky rectifiers, it seems that the simpler TiAl stacks can provide satisfactory solutions at lower cost.
The only possible device structure is, therefore, lateral (fig. 2), with deep groove etching and lateral contacts both for the ohmic and Schottky contacts.
It requires high density plasma etching (usually ICP) using chloride chemistry.
Online since: February 2012
Authors: Lin Fu, Quan Zhang, Bi Yu Tang
The calculated electronic structure further reveals the inherent mechanism of hcp metals.
The Electronic Structure.
Consequently, to further understand the ideal strength, it is helpful to turn to the electronic structure.
This phenomenon can be understood from the features of electronic structure as discussed above.
Massalski: Structure of Metals (McGraw-Hill Publications, New York 1966)
Online since: January 2010
Authors: Michail Michailov
Vacancy mediated diffusion at surface-confined atomic intermixing Michail Michailov Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia Bulgaria mike@ipc.bas.bg Keywords: diffusion, epitaxial interfaces, atomic steps, surface alloying, atomistic simulations Abstract.
On the other hand, regular patterns formation is of great technological importance due to the ability to modify the fine atomic structure of epitaxial interface and to form superlattices with exotic physical characteristics [1,3].
It is important to note that presented on Fig.1 configuration reflects the atomic structure of epitaxial interface in equilibrium.
Our results show that the fine atomic structure of epitaxial interface is controlled by dynamic competition between energy gain by mixing and substrate strain energy.
Online since: November 2011
Authors: Bin Li, Hai Feng Chen, Li Hua Wen, Chen Ma
Magnetite and Anti-microbial Properties of Ag2O-CaO-Fe2O3-SiO2 Glass-ceramic by Sol-gel Method Bin Li1, a, Haifeng Chen1, b, Lihua Wen2 and Chen Ma2 1Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China 2School of Material Science and Engineering, Jiamusi University, Jiamusi 154007, China alb3015@hutc.zj.cn, bheadder@163.com Keywords: Ag2O-CaO-Fe2O3-SiO2, Anti-microbial, Glass-ceramic, Magnetite, Sol-gel Abstract.
An investigation of the structure and properties of Ag2O-CaO-Fe2O3-SiO2 sample heat-treated in air has been made using XRD, DSC, SEM and VSM.
The electron micrograph of the fracture surfaces of the sample heat-treated in air shows a homogeneous droplet micrometer sized structure.
The dependence of the coercive forces of the heat-treated glass might be interpreted in terms of magnetite domain structure, as in the case of the magnetite with the Fe3O4 composition.
Online since: January 2014
Authors: Yu Hang Liao, Wei Lu, Lie Pan
Performance analysis on a solar-driven air-cooled ejector refrigeration system for air-conditioning using ammonia as refrigerant LIAO Yuhang *, LU Wei and PAN Lie College of Civil Engineering and Architecture, Guangxi University,Nanning 530004,China School of Chemistry and Chemical Engineering, Guangxi University,Nanning 530004,China College of Civil Engineering and Architecture, Guangxi University,Nanning 530004,China Keywords: solar energy; ejector refrigeration system; ammonia; performance analysis Abstract.
Adsorption, absorption and jet; solar thermal driven cooling technology compared to the first two have been commercialized technology, jet addition to energy efficiency is low, in the refrigeration system structure, maintenance and suitability are advantages, is a hot research topic in the current solar cooling technology.
The structure and parameters of the main components of the system shown in Figure 2 and Table 1, Table 2.
To ensure the cooling effect of the air-cooled condenser than large, air-cooled structure eliminating the need for cooling water system, the entire solar jet refrigeration system needed by detailed calculations to determine the air-cooled and water-cooled two ways Which more and materials and land.
Online since: September 2013
Authors: Zhong Qiang Zhang
Qinghui Mu et al. [6] reported the direct fabrication of TiO2 subwavelength structures with 1-dimensional TiO2 nanorods on glass substrate through solvothermal process to form self-cleaning antireflection coatings.
A SiO2 (top)/TiO2 (under) double-layer structure was deposited on the outer surface of the glass to integrate self-cleaning and hydrophilicity functions.
Self-cleaning architectural coatings based on biomimetics Barthlott W researched the leaf structure of the lotus plant and put forward a new theory for tremendous hydrophobic and self-cleaning effect [11].
Y.Tan: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 210 (2010), p. 181 [20]E.
Online since: December 2010
Authors: Mao Yan, Li Zhu, Yi Ping Wang, Ming Ze Zhu
Heating and Cooling Performance of Building Integrated Solar Roof Panels Mao Yan1, a, Li Zhu2, b, Yiping Wang1, 2, c, and Mingze Zhu1, d 1School of Chemistry and Chemical Engineering, Tianjin University, Tianjin300072, China 2School of Architecture, Tianjin University, Tianjin300072, China asolar_tj@163.com, bzly_tj@163.com, cwyp56@tju.edu.cn, dprisiser@163.com Keywords:Building-integrated solar technology; Solar panel; solar heating; Nocturnal cooling.
Structure of the proposed solar roof panel The structure of the proposed solar roof panel is shown in Fig.1.
Fig.1 Structure profile of the proposed solar roof panel Heating and cooling performance evaluation Experimental setup.
Online since: November 2013
Authors: Dan Xu, Hong Pan, Hui Qing Ren, Min Zhou, Qin Liu
Native starch commonly exists in a granular structure which can be processed into plasticized starch (PS) in the continuous phase.
These nano-fillers showed effective reinforcements even at very low loadings and provided promising potential to tailor the structure and properties of polymers.
With a small diameter (5 nm on average), large surface area, tailorable surface chemistry and excellent mechanical properties[11], it holds a promising potential for polymer reinforcement.
Moraru, Physical and chemical methods used to enhance the structure and mechanical properties of protein films: A review, J.