Search results

Moreover, the layers are grown without impurities and have perfect structures, since the isotopes are chemically identical.
Conclusion The isotopic materials with more perfect internal structure and greater mobility of the charge carriers, providing the least light scattering and optical loss, are the most promising for the purpose.
[2] Song Xiufeng, Hu Jinlian, Zeng Haibo, Two-dimensional semiconductors: recent progress and future perspectives, Journal of Materials Chemistry C. 1(17) (2013) 2952
Plekhanov, Nuclear nanotechnology of low-dimensional isotopically mixed structures, Nanoindustry 4 (2009) 28–30

However, the values of oxygen packing density start to decrease as the glass structure becomes less dense and loosely packed with further increase of the Sm2O3 content to 2.0 mol % [14], [15]. 2.
Chunhua, Study on Optical Properties and Structure of Sm2O3 Doped Boron-Aluminosilicate Glass, 25, 2007
Chandra Mouli, Structure, physical and thermal properties of WO3–GeO2–TeO2 glasses, Materials Chemistry and Physics, 121(1-2) (2010) 335–341

Preparation of Multi Cage-like Zinc Oxide Nanopowder with High Specific Surface Area via a Large-Scale Hydrothermal Method Bing Liu 1,a Li Li1,a , Li Qu2,a 1Department of Chemistry and Chemical Engineering, XinXiang University，XinXiang, HeNan, 453003,China 2 Henan Institute of Science and Technology, XinXiang, HeNan, 453003,China achengshangzhou@yahoo.com.cn Keywords: High-specific surface, Zinc oxide, Cage-like, Hydrothermal method,Glucose Abstract.
Because of the special crystal structure properties of zinc oxide, many groups has focused on researching on the control of their morphology, but denoted less attention to improve the surface area of zinc oxide.
As shown in Fig.5, only silk-like ZnO with porous structure can be obtained.
The textural structures of the synthesized ZnO samples are further investigated by N2 adsorption-desorption measurement, as shown in Fig.6.

Chemical treatments have been shown to affect the, thermal activity, surface morphology and structure of NF by a number of researchers [17-21].
Asyraf, Potential of natural fiber reinforced polymer composites in sandwich structures: A review on its mechanical properties.
Composite Structures, 244 (2020) 112309
IOSR Journal of Applied Chemistry (IOSR-JAC) 10(5) (2017) 70-73

Due to its highly ordered porous structure, consisting of column form cells with uniformly sized pores, and could be controlled by changing anodizing parameters, such as electrolytes, anodizing voltage and temperature, so it could be used in gas separation systems, optoeclectronics [1], magnetic recording [2] and as templates for the synthesis of various membrane such as metal organic framework membrane [3].
This experimental procedure was the fabrication of PAAM and characterization of their structure by the scanning electron microscopy (SEM).
Fig. 3 Thickness of PAAMs at different anodisation time (A-D:5h-8h, E:10h, F:11h, G:13h, H: cross-sectional image, I:linear relationship between thickness and anodiasation time) Gas separation Single gas The PAAM was investigated for the structure and its application by smith in 1973 [8].
[5] Meizhen Qu, Yijun Chen, Weizhu An, Shendu Guo: Chinese Journal of Synthetic Chemistry, vol. 3(1992), p. 32-39

Solution chemistry greatly influences the formation of the oxide film.
As only a few published articles are available on the effect of solutions and their composition on the structure, thickness, and phases formed in the film on Mg-Zn alloys, this study is aimed to investigate the PEO treatment on ZM21 Mg alloy.
As the concentration increases pores opened to the surface becomes large; pancake structure which is a typical characteristic of plasma electrolytic oxidation is clearly seen.
The first one is the PEO film structure.

Wettability and Interfacial Characteristic of Sn-Ag-Cu solder on Ni Substrates at elevated temperatures Likun Zanga *, Zhangfu Yuanb, Hongliang Yana, Xinxue Lia a Department of Chemistry, School of Chemical and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China b Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China a zanglikun@ustb.edu.cn Keywords: Metals; Soldering; Wetting; Scanning electron microscopy( SEM).
The alloys were constantly stirred in a quartz tube in order to obtain homogeneous structure and composition before casting.
Based on the calculated results, Cu4Ni2Sn5 (8f site) is expected to be the stable structure as suggested by Yu et al[23], Cu4Ni2Sn5 (Ni atoms occupy the Cu2 site, or 8f site) is selected to represent the typical Cu-Ni-Sn IMC since it has the maximum heat of formation indicating that this IMC is the most thermodynamically stable structure.

In view of the natural photosynthesis function of porphyrins, researchers have synthesized various porphyrin compounds with special structures as the sensitizers for DSCs [2].
The substituted μ-oxo-bis[tetra-phenylporphyrinatoiron] ([TRPPFe]2O) compounds constitute the π-conjugation and oxygen-bridge of the D-π-A structure, which absorbs light over the visible range and impacts on the interfacial back electron transfer reaction.
The structures of the four compounds were characterized by infrared (IR), ultraviolet-visible (UV-Vis) spectroscopy and elemental analysis.
Daniel, Structural, Spectroscopic, and Reactivity Comparison of Xanthene- and Dibenzofuran-bridged Cofacial Bisporphyrins, Inorganic Chemistry, 41 (2002) 3102-3109

The Research of Second Acid Fracturing Temporary Plugging Agent in Long Interval Gas Well of Puguang Cheng Yu Zhou*a, b, Dong Wang c, Hong Liu a, Wei Xiong a aCollege of Chemistry & Chemical Engineering, Chongqing University of Science & Technology , Chongqing 401331, China; bGraduate School of Southwest Petroleum University, Chengdu 610500, Sichuan, China; c Research Institute of Production Technology; Zhongyuan Oilfield Company; SINOPEC; Puyang 457001; Henan; China; * Corresponding author.
It means developing a high strength and acidsoluble temporary plugging additive to plug old crack. ` Acrylic acid and acrylamide were conducted free-radical polymerization through cross-linking agent（N-N methylene bis-acrylamid and diethylene glycol）and initiator in the neutral conditions, produced complex three-dimensional structure polymer, added polyester fiber solid intensifier, and evaluated the performance through the different proportion on temporary plugging agent. 2.
Moreover, Molecular weight is related with the structure of the polymer, solution concentration, solvent, nature, temperature and pressure [6].
From the analysis of Fig.5, polyester fiber solid intensifier can prevent temporary plugging particles sinking, because it was distribute in acid fracturing equably, and connected with acid fracturing forming network structure. 4.5.

., 060042 Bucharest, Romania 2 University Politehnica of Bucharest, Department of General Chemistry, 1-3 Gh.Polizu Str., 011061 Bucharest, Romania a catalina.parfene@yahoo.com*, b ghe.solomon@gmail.com, c ioneliav@yahoo.co.uk, d vasileionmihai@yahoo.com, emd_ionita@yahoo.com Keywords: electrochemical charging; fractography; hydrogen; welded seams; Abstract.
Hydrogen diffusion is easier in all regions where the crystalline structure may be distorted as a result of work hardening or cold deformation [7,15].
Research Program The present research aimed at highlighting the hydrogen effect on the cracking process for two types of steel, low alloy steel for S235JR metallic structures and heat resistant 13CrMo4-5 respectively.
In case of cleavage fracture, separation occurs along the crystalline structures well defined in {100} type of b.c.c. lattices.