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Using impedance spectroscopy (IS) for characterization of the electrical properties and gas sensing characteristics of Al2O3/4H-SiC (MOS) structures, insight on the capacitive and resistive contributions in the interfacial region of the MOS structures is obtained.
This voltage shift forms the basis to use the MOS structure as a gas sensor.
CV curves of Pd/Al2O3/SiC/Al structure annealed at 400°C and 900°C upon exposure to H2 and O2.
Probing frequency: 1MHz MOS structure.
Impedance spectra of the Pd/Al2O3/SiC/Al structure annealed at 900°C upon exposure to ~1% H2 and ~25% O2 in Ar at 400°C.

For partially miscible systems, the microphase separated structure critically determines the material’s final properties.
Numerical Details The main step of MD simulation includes built and minimization of the initial molecule structure, amorphous cells structure and minimization, anneal of the structure and MD calculation.
The smart minimization method was used to optimize the structure of each model. 2.2 The Amorphous Cells Structure and Minimization.
As we can see from Fig. 3(a) , there isn't peak from 0.3-1.2nm which means the structure we built is amorphous configuration .
Journal of Physical Chemistry B, Vol.38 (1998), p.7338

Chemistry and Processing Тechnology of Еlastomers Department Kazan National Research Technological University 68 Karl Marx street, Kazan, 420015, Republic of Tatarstan, Russian аnigmatullina-al@mail.ru Keywords: thermoplastic vulcanizate, layered silicate, composite, modified montmorillonite, structure characteristics Abstract.
The methods of fractal analysis were used for the calculations, since the formation of the structure of the polyolefin-elastomer matrix of the composites takes place in three-dimensional Euclidean space.
Values ​​df < 3, which indicates the formation of the structure of composites in a three-dimensional fractal space.
The elastic modulus of amorphous-crystalline polymers is controlled by the structure of noncrystalline regions.
Table 2 - Structural characteristics and properties of composites based on nitrile-butadiene rubber, polypropylene and montmorillonite Structural characteristics MMT content, pbw 0 1 3 5 df 2.608 2.642 2.634 2.666 μ 0.304 0.321 0.317 0.333 φf − 0.006 0.018 0.030 φir − 0.125 0.115 0.129 lir / bp − 10.4 3.2 2.2 С∞ 3.55 3.79 3.73 4.0 С∞ir − 5.5 5.1 7.0 С∞Dc − 15.30 15.04 12.58 Dc − 2.0 2.0 1.83 * df – the fractal dimension of the structure; μ – the Poisson's ratio; φf and φir – volume fractions of the filler and interfacial regions; lir – interfacial layer thickness; bp – MMT plate thickness; С∞ – an indicator of the static flexibility of the polymer chain; С∞ir – an indicator of static flexibility of the polymer chain in the interfacial region; Dc – the degree of tension of amorphous chains, 1< Dc ≤2 The calculated values of Dc, given in Table 2, show that the degree of tension of amorphous chains depends on the content of the rubber phase and is maximum

Introduction Titanium dioxide (TiO2) was wildly applied in the field of sewage treatment, air purification and disinfection deodorization as its unique chemistry stability, corrosion resistance, nontoxic and low cost et al recently[1].
In addition, TiO2/SnO2 with folded structure has advantages such as controllable structure, even surface, intact crystalline phase structure, good light absorbing properties and obvious interface characteristic et al, which lead to the research of TiO2/SnO2 composite films was greatly concerned.
It can be seen that surface of TiO2/CF film exhibited dense and non-porous structure, while even microporous structure with nanoscale was generated on the surface of TiO2/SnO2/CF film.
In addition, it can be seen that the integrity of structure of the rutile SnO2 was not good existing some defects still.
Preparation and photocatalytic properties of nanometer SnO2／TiO2 of nucleus-shell structure [J].

Because of the complex well structure and poor cement quality, separated zone water injection using normal packer is of high risk.
The technique is easy, well structure is not changed, and amount of operation work is small.
Oilfield Chemistry, 20(1): 20-22
Oilfield Chemistry, 18(2): 129-132
Oilfield Chemistry, 20 (2): 119-120

On the other hand, more recently graphene and its derivatives have been enormously investigated in the biological applications because of their biocompatibility, unique conjugated structure, relatively low cost and availability on both sides of a single sheet for drug binding.
However, Dai et al. developed functionalization chemistry in order to impart solubility and compatibility of GO in biological environments [12].
The difference in the loading capacity of the drug between two kinds of nanocarriers is attributed to the difference in the chemical structures between the MWCNT and GO, and thus the difference in the hydrophobic interactions and π-π stacking with the MWCNT and GO as shown in Figure 1.
Dai, Supramolecular chemistry on water-soluble carbon nanotubes for drug loading and delivery, ACS Nano 1 (2007) 50-56

China, 2College of Chemistry, Qingdao University, Qingdao 266071,P.
The morphology and structures were measured by SEM and fluorescence microscope.
The two as-spun fluorescent structures have potential applications in fluorescent security, fluorescent detection, and so on.
In order to fabricate microrope structures, we did some modification with the collector previously.
These structures may have potential applications in transistor, field emission, and so on.

Jiang2 1 College of Mechanical Engineering, Shandong University, Jinan, 250061, China 2 College of Chemistry & Chemical Engineering, Shandong University, Jinan, 250100, China Keywords: Dynamic characteristics, High-speed machining tool, Group representation theory, Rotating symmetry Abstract.
We can apply anyone of symmetry operations in Cn group to such a structure that interchanges the positions of various points in it but results in the structure looking exactly the same as before the symmetry operation.
And such a structure is defined as Cn structure.
Solving Eqs.3 and 4, the frequencies � obtained are the natural frequencies of structure, but, the generalized displacements qj in each irreducible subspace must be transformed to the global physical displacements (k) U of the structure in order to obtain the mode shape of structure [4].
The displacement of structure can be obtained in a similar way as above.

Sultan Ahmad Shah, Bandar Indera Mahkota, 25200 Kuantan, Pahang 2Department of Chemistry, Kulliyyah of Science, International Islamic University of Malaysia, Jln.
α-chitin β-chitin γ-chitin Figure 1: Structure of different chitin conformations (α, β and γ-chitin) Black soldier fly industry by-products as a new source of chitin Due to the increasing application of chitosan in wastewater treatment and other high-value industries such as pharmaceutical, biomedical, cosmetics and food, the global chitosan market size is expected to increase from the current value of USD 6.8 billion between 2020 and 2027 [8].
Sayed, Valorisation of chitinous biomass for antimicrobial applications, Pure and Applied Chemistry. 90 (2018) 293–304. https://doi.org/10.1515/pac-2017-0707
F.Ó, Improving Extraction Processes Of Crustacean Chitin Using Solid State Analytical Techniques, International Journal of Applied Chemistry. 6 (2019) 23–30. https://doi.org/10.14445/23939133/IJAC-V6I2P104
Rosiak, Determination of degree of deacetylation of chitosan-Comparison of methods, Progress on Chemistry and Application of Chitin and Its Derivatives. 17 (2012) 5–20.

Butler2,b 1 Postdoctoral Exchange Center of Chemical Engineering and Technology, College of Chemistry and Chemical Engineering, Central South University, Hunan, China, 410083 2Department of Chemistry,McGill University,Montreal, Quebec,Canada,H3A 2K6 awzp@csu.edu.cn, bian.butler@mcgill.ca Keywords: germanium; tin; pyrrole; η5-C5H5; Density Functional Theory Abstract.
Its redox chemistry, however, has been underutilized [14-20].
The sketch map of synthesize reactions route Results and Discussion Structure stability of the products M(CO)2CY-Ph3XR(M=Cr, Mn; X=Sn, Ge; Y=S, Se; R= N(C4H4), N(C8H6), C6H5).
Roberts: Journal of Organometallic Chemistry, Vol. 108 (1976), p. 27-33.