Search results

The optical properties of a material, such as absorption characteristics, electronic band structure, and material disorder, have a major influence on its electronic properties.
In prior work involving the rGO-csc that we create, the presence of molecular bonds like C-C, C=C, C-H, C-O, C=O and O-H as well as the structure's XRD and FTIR characterization, demonstrated the development of a rGO-like structure [5, 6, 7].
Khambali et al., ‘N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance’, Journal of Renewable Materials, vol. 0, no. 0, pp. 1–11, 2022, doi: 10.32604/jrm.2023.025026
Kumar et al., ‘Possible evidence of delocalized excitons in Cr-doped PrFeO3: An experimental and theoretical realization’, Journal of Physics and Chemistry of Solids, vol. 130, pp. 230–235, Jul. 2019, doi: 10.1016/j.jpcs.2019.03.012

A series of crucial informations, such as chemical composition, structure and residual stresses were collected and compared.
Moreover, XPS data were collected on bone tissues grown on silicon nitride surfaces in order to study the incorporation of silicon into the crystallographic structure of hydroxyapatite.
Si3N4 effectiveness can be associated with the presence of both negatively and positively charged regions that easily interact with the biological environment: they bond to integrins, which are contained in multi-protein structures referred to as focal adhesions and they also serve as nucleation points for crystals of hydroxyapatite.
The surface chemistry of Si3N4 was effective in stimulating differentiation, leading to both faster osseoinductive and osseoconductive processes[1,4].
All properties resulted to be regulated by the peculiar chemical structure of the outermost layers of Si3N4 and, in particular, the dispersion of positively and negatively charged terminals.

Oxygen Content Change characters and the influence superconductivity in the Doped YBCO Systems Yanqin Huang Department of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang, 453003, China E-mail: xbhyqhyq@163.com Keywords: Elemental substitution; Positron annihilation; Simulation analyses; Local electron density ne.
Introduction To make progress in the cuprate superconductors the microstructure is essential, YBCO system has typical CuO2 plane and Cu-O chain structure [1-2], In order to clarify the functions of CuO2 planes and Cu-O chains in YBCO superconductivity, element substitutions play an important role in the investigation of high-Tc superconductivity [3-4].
The structure of the samples was analyzed by powder XRD in the D/max-B X-ray diffractometer.
Effect of dopants on structure and superconductivity XRD results .The XRD results show in Fig. 1 and Fig. 2.
The marked cluster effect will distort the structures of crystal lattice, which directly influence the pairing and transportation of carriers, and thus the superconductivity is suppressed noticeably.

Theoretical and Experimental Analyses of Colloidal Processing of Nanoparticles Yoshihiro Hirata1,a, Koichiro Matsushima1,b, Shinichi Baba1,c, Naoki Matsunaga1,d and Soichiro Sameshima1,e Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan ahirata@apc.kagoshima-u.ac.jp, bk-matsushima@apc.kagoshima-u.ac.jp, cs-baba@apc.kagoshima-u.ac.jp, dn-matsunaga@apc.kagoshima-u.ac.jp, esamesima@apc.kagoshima-u.ac.jp Keywords: Colloidal particles, Dispersion, Flocculation, Colloidal phase diagram, Pressure filtration, Phase transition.
The stability of colloidal particles under an applied pressure is a key factor to understand the green structure formed.
Figure 2 shows a structure model of colloidal suspension (1 l volume) containing both dispersed and flocculated particles.
Schematic structure of colloidal system (a) after the phase transition from dispersed to flocculated suspension and hydraulic pressure profile of the filtration system (b).
Figure 5 shows the schematic structure of the suspension and the hydraulic pressure profile across the mold, consolidated layer and flocculated suspension.

Oxidative Removal of Dibenzothiophene by H2O2 over Activated Carbon-supported Phosphotungstic Acid Catalysts Guo-Xian Yu1,2* , Rui Xue Zhou1 , Ji-Bing Li2* , Xiao-Long Zhou2, Cheng-Lie Li2 , Li-Fang Chen3* , Jin-An Wang 3 1 School of Chemistry and Environmental Engineering, Jianghan University, Wuhan 430056, China 2 School of Chemical Engineering, East China University of Science & Technology, Shanghai 200237, China 3 ESIQIE, Instituto Politécnico Nacional, Av.
Results and Discussion 3.1 Textual structures and adsorption capacity of catalysts Table l Textural structure and adsorption capacity of each sample Catalyst samples BET surface area (m2.g -1) Pore volume (cm3.g -1) Average pore diameter (nm) Adsorption capacity mg S / g AC 2147 1.83 3.34 42.00 HPW-1 947 0.77 3.31 41.30 HPW-5 1165 0.94 3.26 39.88 HPW-10 937 0.78 3.39 37.41 HPW-15 904 0.73 3.24 33.13 The physical properties of the carbon-supported catalysts were given in Table 1.
The typical FT-IR band of pure phosphotungistic acid peaked at four frequencies, including 1080 cm−1 ascribed to P-O bonds, 985 cm−1 to W O groups, 892 cm−1 to W-O-W in corner shared octahedral structure and at 804 cm−1 to W-O-W in edge shared octahedral structure, respectively.

Ting5,e. 1,2,3,5Resource Chemistry Program, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak 94300, Kota Samarahan, Sarawak, Malaysia. 2Graduate School of Nuclear and Allied Sciences, University of Ghana, AE1, Kwabenya-Accra, Ghana. 4Malaysian Nuclear Agency, Bangi, Kajang, 43000 Selangor, Malaysia.
However, as the concentration ratios increases in both cases, spherical structures were formed with the emergence of some rod-like structures dominating, and finally aggregated to form flower-like structures at 30 oC temperature.
The study reported of a particle size of 48 nm with a hexagonal wurtzite structure.
Further increase in the alkaline molar concentration of 1:3 produced spherical shaped structures (Fig.3b), and upon further increase to 1:5, different structures such as rod-like and flakelike structures that aggregated into flower-like structures (Fig.3c).
But, when the concentration ratio increased to 1:5, spherical structures dominated the entire structures formed.

Seeking the possibility of creating pieces of work with certain curvature, architects and decorators have chosen either not to use ceramic material or fragmenting them to accompany the structure.
This condition could only be obtained by fragmenting the glass, a technique that consists of cutting the glass into smaller fragments to the curvature, much similar to the approximation of a curved surface area through numerical integration with definite subintervals, in order to conceive a sinuous-like structure.
This would often compromise the product aesthetics, as the result would render octagonal, decagonal, tetra decagonal structures instead of continuously round shapes [1].
Aiming for more sinuous walls, these professionals choose either not to use ceramic plates or to fragmentize the piece in order to make an adequate structure, which results in a less visually pleasing and rather laborious work.
Werner: Chemistry of Glass.

In Fig. 1a, the curve one shows that: 3050cm-1 absorption peak corresponding to the benzene ring C-H stretching vibration; 1600cm-1, 1580cm-1, 1500cm-1 and 1450cm-1 intensity ranging from 4 peak on the benzene ring C=C skeleton vibration absorption peak, it means that V72R carbon has a form similar to the benzene ring C6 graphite structure.
During the course of the reaction, Mn2+ adsorbed on the activated carbon surface, and the activated carbon from coal excellent conductivity, Mn2 + electrons can be transferred through the activated carbon to MnO4-, reaction into easier for the electrochemical reaction, facilitate the reaction orderly, and pore structure of activated carbon inhibit the diffusion of ions, making the reaction more orderly, which are conducive to the MnO2 to form crystals.
This is because the increased KMnO4 concentration, the intensity of the reaction increase obtained MnO2 molecular defects, electrochemical activity center to increase the catalytic oxygen reduction ability, so the ratio of the specific energy increase; But with KMnO4 concentration continues to increase, and Mn2+ late conduct of the reaction, the remaining MnO4-will be oxidized activated carbon, activated carbon surface structure is destroyed, the ratio of the surface area is drastically reduced, particularly KMnO4 concentration 54.4gL-1, at which time the reaction will generate large H3O+ under acidic conditions, KMnO4 oxidation is enhanced, the activated carbon would be oxidized, many side reactions, MnO2 and carbon obtained even unable to form complexes, its catalytic performance degradation, the corresponding battery than the energy is greatly reduced.
Increases the ratio, carbon content increase, catalyst MnO2 inadequate, decrease the ratio, the carbon inadequate, the positive electrode conductive poor, these would cause the battery to lower specific energy; (3) Increase the KMnO4 concentration , prone to side reactions, the surface of activated carbon structure is destroyed, the corresponding battery than the specific energy drop.
Journal of Industrial and Engineering Chemistry,2009(15): 445–450

Alternatively, a low temperature setting affects polypropylene's crystalline structure [19].
However, rPP excels in durability and flexibility due to its pliability, ductility, and robust impact resistance, attributed to its molecular structure.
ACS Sustainable Chemistry & Engineering 2020, 8, 43, 16350–16363 (2020) [11] Herianto et. al.
Comparison of mechanical properties of PLA and ABS based structures produced by fused deposition modeling additive manufacturing.
Comparison of mechanical properties of PLA and ABS based structures produced by fused deposition modeling additive manufacturing.

However, as Aaron Klug, Nobel laureate in chemistry wrote, "Research is not a wondering from summit to summit, but we have to go down the valleys and work hard, permanently, and with obligation".
Since 1970, he was the member and office-bearer of the different committees of Hungarian Academy of Sciences (Committee of Structure of Metals, Committee of Material Science and Technology, Complex Committee of Research of Solid Bodies of Hungarian Academy of Sciences, Special Committee of Physics of Cosmos of Intercosmos Board of Hungarian Academy of Sciences etc.) for decades.
From the beginning, he played a determining role in organizing the research laboratories of physical metallurgy and materials structure at VASKUT, in advancing the possibilities of experimental physics and in inducing the branch to accept the new research-development approaches based on the materials science.
Hans Eckart Exner felt, i.e. to understand and communicate structure and properties of materials, entailed that numerous details of his observations on microstructures of materials were placed in larger contexts and found to be basic laws.
Hellmut Fischmeiseter he finished the work on his PhD thesis entitled "Structure and properties of the hard metal WC-10%Co" within only two years.