Search results

Trukhanova, AC and DC-shielding properties for the Ni80Fe20/Cu film structures Journ. of Magn.
Specifics of the pyrohydrolytic and solid-phase syntheses of solid solutions in the (MgGa2O4)X(MgFe2O4)1-X system, Russian Juornal of Inorganic Chemistry, 55 № 3 (2010) 427-429
Rousse, Influence of substrate, pH and magnetic field onto composition and current efficiency of electrodeposited Ni-Fe alloys, Journal of Electroanalytical Chemistry, 612 №1 (2008) 9–14
Balagurov, Evolution of structure and magnetic properties for BaFe11.9Al0.1O19 hexaferrite in a wide temperature range, Journ. of Magn.
Vinnik, Electrochemical deposition regimes and critical influence of organic additives on the structure of Bi films, J. of All.

The scheme shows the chemical structure of the used TL.
From the molecular structure of the TL [8,9], it can be concluded that the lipid is organised mainly in an uprightstanding conformation.
The basic membrane structure could still be seen (Figure 4). 250 nm A B Ag Ag Figure. 3.
These structures can be discussed as the important key for the better antiadhesivity of the surface. 3 µm A B Figure. 4.
[4] Danese: Chemistry & Biology Vol. 9(2002), p. 873 [5] R.

There chemical structure are showed in Figure1.Poly(L-lactide) (PLLA) (Mη=100,000) was purchased from Bright China Industrial Co.
(a) (b) (c) Fig.1Chemical structures of the polymer and compound antihypertensive drugs.
So all functional groups in two drugs could be found in the composite, which indicated that the chemical structures of two drugs were unchanged and their anti-hypertensie were also retained in electrospinning process.This was due to the pure physical process for electrospinning.
With the increase of the ratios of the drugs , the decomposition temperature of captopril increased, when the ratio of the drugs were 15 percent, its decomposition temperature increased from 246.6℃ to 438.3℃,as shown from figure 5,which implied the heat stability of the drugs in the composite were better than the pure drug .This was due to the combination of the drugs and the polymer in the form of the molecular structure and the formation of the hydrogen bond between the hydroxy of captopril, the amidogen of hydrochlorothiazide and the carbonyl of PLLA .With the increase of the drug content, the actions of the formed hydrogen bonds were stronger.
:Materials Chemistry and Physics Vol.113 (2009), p.296. 7.Bhuvanesh Gupta, Nilesh Revagade and Jo¨ ns Hilborn,: Progress in Polymer Science Vol. 32, (2007), p.455. 8.Fong H,Chun Iand Reneker D H:Polymer Vol.40 (1999), p.4585. 9.Sliverman R B,.in :The Organic Chemistry of Drug Design and Drug action. chapter, 11, Elsevier Academic Press(2004).

The excellent physical and chemical properties of graphene and GO have attracted great attention from scientists of materials, chemistry, physics and biology.
Results and Discussion In order to investigate the chemical structure of GO/ phenolic resin, the solubility of GO, phenolic resin and GO/PF have been compared in THF, DMF and chloroform, respectively.
DSC curve of GO (Fig.2a) suggests the GO decomposed from 170ºC, and the structure of GO destructed absolutely at 220ºC, with an intense exothermic peak at this point [10].
As shown in Fig.4c, 4d, there are rough spherical particles with folded structures, providing large surface areas which are convenient for modification.
Meanwhile, as shown in the photos for GO/PF modified by GO (Fig.4e, 4f); there are smooth structures with partial crackles.

The XRD pattern shows for Fe3O4 powder a face centered cubic structure, according to 75-1610 ICDD file.
The morphology and structure of the samples were investigated by transmission and scanning electron microscopy.
Raj, Effect of Digestion Time and Alkali Addition Rate on the Physical Properties of Magnetite Nanoparticles, Materials Chemistry and Physics 103 (2007) 168 - 175
Structure of dextran-magnetite complex: relation between conformation of dextran chains covering core and its molecular weight.
Seppala, Modification of dextran using click-chemistry approach in aqueous media, Carbohydrate Polymers 82 (2010).78–82

Unlike other forms of oxyhydroxides, such as goethite (α-FeOOH) or lepidocrocite (γ-FeOOH), akaganeite includes tunnel structures, in which Cl- ions is stabilized by hydrogen bonds and could be replaced by OH- groups.
An elementary cell consists of 8 FeO3(OH)3 octahedron, forming a double-ring structure.
Determination of Static Exchange Capacity (SEC) Before sorption the crystalline structure of IOH sorbent was saturated by OH- groups.
Nan, Effects of experimental conditions on one-dimensional single-crystal nanostructure of β-FeOOH, Materials Chemistry and Physics, 27 (2011) 220-226
Morales, Characterization of akaganeite synthesized in presence of Al3+, Cr3+, and Cu2+ ions and urea, Materials Chemistry and Physics. 112 (2008) 120-126

The study focuses on diluted HF mixtures, which in general show overall better compatibility with metal gates than strong oxidizing chemistries.
This complex approach has the advantage to decrease the recess of the field oxide which is especially important for future 3D finFET transistors structures where box oxide recess should be minimized.
The patterned structures were cleaned in a 200 mm single wafer cleaning tool with different diluted HF solutions and the corrosion after the different treatments was evaluated using Scanning Electron Microscope inspection (Nova200 Nano SEM).
Tests on structures - The galvanic corrosion at the level of the transistor gate stack in HF solutions is illustrated with tests structures (fig. 5, 6 and 7).
The PolySi/TiN couple is not likely to generate a large galvanic current for a 10:1 area ratio as it can be concluded from figure 2: a galvanic current of 1E-5 A/cm2 is measured for a 1:1 contact between PolySi and TiN and consequently for a 10:1 anode/cathode ratio corresponding to gate structures shown in figure 1a, the current should be less than 1E-5 A/cm2.

Characteristics and Mechanism for Host–Guest Recognition of Isopropanol Vapor Based on Calixarene Supramolecules Rui-Fen Zou1,a, Zhong Cao1,b,*, Ju-Lan Zeng1, Yun-Lin Dai1, Li-Xian Sun1,2,c,* 1 Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410004, P.
The structure of these four compounds is shown in Fig. 1.
Fig. 1 Structure of calixarene derivatives Left, RCT: X=H, PCT: X=OH, MRCT: X=CH3; Right, TBCA: n=8.
Firstly, as to the same adsorptive coating material of RCT, the frequency shift response to guest analyte of isopropanol was much larger than that of methanol and ethanol, that was obviously related to the structure of the guest molecule.
It was decided by the relatively week hydrogen bond of C—H···π (benzene ring) formed between the methyl group of the isopropanol guest molecule and the phenyl ring of the calixarene host, which has been proven and confirmed by using single crystal structure calculation with quantum chemistry [8].

Rheological Properties of Sodium Metatungstate in Aqueous Solutions Jiangang Ku1, a *, Kui He1, b, Huihuang Chen2, c and Wenyuan Liu1, d 1College of Zijin Mining, Fuzhou University, Fuzhou, Fujian, 350116, China 2College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China akkcc22@163.com, b243280330@qq.com, cchenhuihuang2012@gmail.com, d15146@163.com Keywords: Sodium metatungstate, Rheological properties, Apparent viscosity, Herschel-Bulkley model.
Due to the molecular attraction among molecules and ions in SMT solutions, the system is arranged in spatial structure.
It can also be seen from Table 2 that the value of τ0 for SMT solutions at different density is very small, which demonstrates that although molecular attraction exists in SMT solutions, the intensity of the formed spatial net structure is weak.
It can also be seen from Fig. 2 that molecule structure or aggregate state in SMT solutions did not change in the range of test temperature.
Molecules in SMT solutions attract each other and form spatial net structure of weak intensity.

The N2 adsorption–desorption isotherms (Fig.2a) shows that graphene materials possesses Type IV isotherm and Type H3 hysteresis loop (according to the International Union of Pure and Applied Chemistry (IUPAC) classification), indicating the presence of mainly mesoporous structure and slit-shaped pores.[3] Therefore, the pore size distribution (Fig.2b) was obtained by a hybrid DFT (NLDFT) model, assuming cylindrical slit-shaped pore geometry for the mesopores.
A layered structure has been observed in SEM images of both pure graphene (Fig. 4a, 4b) and graphene/spacer composites (Fig. 4c, 4d), which results from stacking of graphene sheets because of the van de Walls force interaction.
This result is also consistent with our previous work using functionalized carbon blacks as the spacer to prevent graphene restacking.[4] Overall, based on the XPS spectra, N2 adsorption–desorption isotherms, pore size distribution, SEM, and TEM observations, it can be concluded that our synthesized graphene/ spacer composites exhibit layered structure, separated by spacer nanoparticles.
Such a structure with both high surface area and proper size distribution may lead to faster diffusion rate in graphene/ spacer composites, which can be utilized in supercapacitor application.
Gorchinskiy, Layer-by-Layer Assembly of Ultrathin Composite Films from Micron-Sized Graphite Oxide Sheets and Polycations, Chemistry of Materials 11 (1999) 771-778