Search results

Results and Discussion In this study, 4° off-cut n-type 4H-SiC substrates (0001), with a doping concentration of 5× 1018 cm-3, were cleaned by standard Sulfuric-Peroxide Mix (SPM) and Buffered Oxide Etchant (BOE) (7:1) chemistries as per previous work prior to fabrication [4].
This step is crucial to ensure a clean surface prior to fabrication of the test structures to prevent defects from remaining at the MS interface.
Cross section of (a) SBD with Ti/Al Schottky contact (b) CTLM structures for SCR extraction. 2(a) 2(b) Fig. 2.
I-V Measurements of CTLM structures with 20 – 100 µm gap spacings (a) without ITO interlayer and (b) with ITO interlayer.
Ave R vs Gap out of 3 sets of CTLM structures (a) without ITO interlayer and (b) with ITO interlayer.

Yakovleva3,c 1Department of Physical Chemistry of Materials and Technology, V.P.
In fig. 1a, b it can be seen that the coatings metallized with chromium and titanium have homogeneous and uniform surface structures.
Thus, the coating metallized by chromium has a dense and more homogeneous in elemental composition and a nanoscale granular structure that is not distinguishable on the reduced image scale.
Whereas, the coating metallized by titanium has a layered and non-uniform in grain size and homogeneous in elemental composition structure.
SEM-images of metallized diamond grains, structure and morphology of coatings after solid-phase interaction of diamond with chromium (a, c), titanium (b, d).

Hydrothermal Preparation and Photocatalytic Activity of Different Morphology Titania WANG Huaiyuana, ZHU Yanjib , YU Zhenc, ZHU Youzhuangd, CHEN Yinge College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing , 163318, China aemail: wanghyjiji@163.com, bemail:jsipt@163.com, cemail:email:8324028@163.com demail:sanxiazhuyouzhuang@163.com, eemail:chenying648617@163.com Keywords: large size TiO2 grain;hydrothermal method;morphology;Photocatalytic activity Abstract.
It is evident that the XRD pattern of the as-synthesized samples, the crystalline structure and the compositions of the TiO2 did change during the treatment.
TiO2-nanofibers with TiO2(B) phase structure were formed at 190℃ followed by calcination.
(a) TiO2-Flake (b) TiO2-Fiber (c) TiO2-Grain Fig.4 Morphology image of different products The structures and photocatalytic properties of the obtained samples have been summarized in Table 1.
It is well documented in literature that photocatalytic activity of TiO2 is strongly dependent on its phase structure and specific surface areas[12-13].

Although, the β- tricalcium phosphate (β-TCP) sinned from cancellous bone after setting remained porous space structure of natural cancellous bone, the application of β-TCP for repairing bone defect was delayed because of its high brittleness, low hardness and lacking self-set in situ.
The optimal bone substitute is one with a composition and a structure similar to that of human bone tissue.
The present vesicular structure of combined artificial bone before self-setting can be considered that the beehive-shape structure in the β-TCP was remained (figure 4a).
The distinct columnlike structure rods of combined artificial bone after self-setting were obtained (figure 4b), α-CSH crystals covered β-TCP, and the beehive-shape structure in the β-TCP was disappeared.
The material bone: structure mechanical function relations.

Production of a Brushite/Silk Composite Powder for Coatings Sahin Altundal1,a* and Karlis Agris Gross2,b 1Faculty of Mechanical Engineering, Transport and Aeronautics, Riga Technical University, Riga, LV­1006, Latvia 2Faculty of Materials Science and Applied Chemistry, Riga Technical University, Riga, LV-1048, Latvia asahin.altundal@edu.rtu.lv, bkarlis-agris.gross@rtu.lv Keywords: brushite, silk, biocomposite, ethanol treatment, silk coating, particle coating, biocoating.
Results and Discussion In order to dissolve the amorphous phase and release the β-sheet structure out of silk fiber, organic solvents with a low dielectric constant such as methanol, hexafluoro-isopropanol (HFIP), dioxane or ethanol have been used for treatment [8,9].
These treatments are known to increase the crystallinity and decrease the solubility of the silk by transforming from a coil-like structure to β-sheet structure [10].
In silk containing media, it is expected that brushite crystals will grow towards the β-sheet structures and collect these structures during stirring.
Due to the low crystallinity of silk structure, strong absorption peaks of the brushite crystal structure suppress the CaCl2-ethanol treated silk phase (Fig. 2).

These correspond to the changed of ZnS crystal structure with increasing of Fe content.
Decreasing the sizes of the particles indicate that Fe2+ ion occupied with the ZnS crystal structure.
In addition, further increase in the concentration of Fe2+ ion will change the ZnS structure.
Journal of solid state chemistry 181 (2008)1582-1589
[18] R.Saravanan .Growth and local structure analysis of ZnS nanoparticles.

Introduction Nanoscience is the study of the properties of structures of the size smaller than several hundreds of nanometer (nm).
Nanotechnology consists in techniques for designing and manufacturing these structures as well as applications arising from these.
Today, there is increasing interaction between electronics, chemistry, physics, biology, medical sciences, information and communication sciences. 
· Nanotechnology can make the structure of space planes much lighter thus can greatly improve their viability
[2] Hans-Eckhardt Schaefer; Nanoscience: The Science of the Small in Physics, Engineering, Chemistry, Biology and Medicine 1st Edition.

The structure and mechanics of cork.
Journal of wood chemistry and technology 18.4 (1998): 447-469
Holzforschung-International Journal of the Biology, Chemistry, Physics and Technology of Wood 51.3 (1997): 225-234
Cellular Solids: Structure and Properties.
"The effect of long term treatment at 100 C–150 C on structure, chemical composition and compression behaviour of cork."

Introduction Two-dimensional (2D) crystals have attracted more and more attention from researchers because of their unique 2D structure and excellent photoelectric properties in recent years, and have important applications in optoelectronics, chemistry, catalysis, biosensing, solar cells, lithium-ion batteries, and supercapacitors [1].
In the BP monatomic layer, each phosphorus atom is covalently connected with three surrounding phosphorus atoms to form a folded honeycomb structure [2], and the layers are combined by van der Waals force, so that single-layer or fewer layers of nanosheets can be peeled off.
As a direct band gap semiconductor with a 2D layered structure, BP has garnered wide attention in recent years.
TEM and HRTEM characterization The morphology and crystal structure of the BP/TiO2 nanosheets were analyzed by TEM and HRTEM.
The band gap of BP, calculated using the Tauc plot method, was found to be 1.06 eV and 1.23 eV, corresponding to 4-3 layers of BP, indicating the successful formation of 2D BP structures.

The structure of the carrageenan polyelectrolyte complex is depicted in Figure 3.
Structure of the carrageenan-chitosan polyelectrolyte [23].
Meanwhile, the KCar-Chit and AgNPs/KCar-Chit hydrogel films demonstrated an uneven, structured surface and an aggregate form.
Coli, a gram-negative bacteria, can be considered due to the structure of their cell walls.
[17] Susilowati E, Triyono, Santosa S J, & Kartini I, Synthesis of Silver-Chitosan Nanocomposites Colloidal by Glucose as Reducing Agent, Indonesian Journal of Chemistry 15(1) (2015) 29-35