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Quaternary CZTS compound crystallizes in the kesterite structure .but possible existence of the structurally similar stannite structure cannot be ruled out, because of kesterite structure of CZTS differs about stannite structure only in the copper and zinc [5,6].
Crystallizing this material in the form of a wurtzite structure generally offers flexibility over stoichiometry control and also facilitates the nanocrystals to grow in 1D morphology along the anisotropic c-axis direction [7,8].
The structure of the solar cell was graphite/Cu2Zn1–xCdxSn (Se1–ySy)4/CdS/ZnO.
Three dimensional structure of the buffer/absorber interface in CdS/CuGaSe2 based thin film solar cells.
Journal of Physicsand Chemistry of Solids (2012),doi:10.1016/j.jpcs.2012.01.008 [26] Shiyou Chen, X.

It is now widely used in biology, acoustics, seismology, chemistry and many other areas.
The basic structure of lock-in amplifier is shown in Fig. 1.
The structure of the designed LIA is illustrated as Fig 2.
Figure 2 Structure of FPGA-based LIA Design of DDS.
Fig. 5 shows the structure of the low pass filtering algorithm.

Because of the reaction is exothermic and the reaction heat can be formed into a cellular structure by evaporating physical blowing agents.
Cellular structure images were examined by using scanning electron microscope (SEM) of JEOL-JSM6380LA operate at 15kV at 30X magnification.
Fig. 1 shows the morphology of the green polymer foam revealed having open cell cellular structures with different H2O loading.
In overall, the morphology structure of green polymer foam exhibited that the high loading of H2O tend to modify the open cell structure to become bigger.
Schadler, Rahmi Ozisik: Influences of Nanoparticle Surface Chemistry and Size Supercritical Carbon Dioxide Processed Nanocomposite Foam Morphology.

In the case of a lower value of this ratio, the presence of fluorite structure can be expected [3].
This oxide has the body-centred cubic type of structure.
The DSC curve did not show the start point of Dy2Zr2O7 fluorite structure formation.
However, the transverse transformation of tetragonal to monoclinic structure during cooling was not detected on the DSC curve.
V., Russian Journal of Inorganic Chemistry 56 (2011) 1538

Though PPD’s polymeric structure [1], the carbon number of PPD [2], the components and properties of crude oil [3,4] affect the effects of PPD on crude oils, the applying conditions of PPD should not be ignored and need to be analyzed and studied deeply.
Study of wax crystal structure.
This is because that wax content in 3# oil is higher, wax crystal precipitating from oil in cooling process is more, and bigger wax-crystal structure is easier to form due to intensive wax crystal.
This is because that PPD and wax co-crystallize and form eutectic, resulting in the break of flake structure and the formation of smaller wax-crystal structure.
Fig. 2 Polarizing microscope images of wax-crystal structure in cooling process It can be seen from Fig. 2 that needle-like crystals began to precipitate at 51.9˚C, and wax crystal precipitated in large numbers and formed network structure at 51.5˚C.

Effects of Cd and Cd-Cu doping on the microstructure and electrical properties of NiMnCoO NTC ceramics Na Guoa, Yadong Lib College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China aguona_002@163.com, bliyadong@suda.edu.cn Keywords: NTC ceramics; Cd and Cd-Cu doping; Spinel phase; Electrical properties Abstract.
The NiMnCoO based NTC ceramics exhibit the spinel structure with the general formula AB2O4.
The phase purity and crystal structure of the ceramics were identified by X-ray diffraction (XRD) technique using CuKa radiation.
XRD analysis showed that a tetragonal distorted spinel structure，except for CdO and Mn2O3 impurity phases (Fig.2(a))，have formed after calcination at 850 oC for 1h, which was transformed to the cubic structure at higher sintered temperature [11, 12].
As Fig.2 (b) showed, after sintered at 1100 oC for 1h， the samples had the same cubic spinel structure with NiMn2O4 (JCPDs Card 01-1110), and the lattice parameter was 8.3588~8.4580Å.

Solvothermal synthesis of Bi2Se3 hexagonal nanosheet crystals Haitao Liu1,a, Jun Dai1, Jiajia Zhang1, Weidong Xiang1,2,b 1College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P.R.
Mechanism of forming hexagonal Bi2Se3 nanosheets may be due to its anisotropic structure.
Fig. 4 shows the crystal structure of hexagonal Bi2Se3, which consists of Bi and Se layers stacked along the c-axis and presents the combination of Fig. 4 Crystal structure of hexagonal Bi2Se3 three hexagonal layer stacks of the composition in which each set consists of fiveatoms (Se1-Bi-Se2 -Bi-Se1 ).
A Bi layer is made up of Bi atoms arranged to form a plane hexagonal structure, and a Se layer formed by Se atoms arranged in the same way.
The formation of Bi2Se3 hexagonal nanosheet crystals is contributed to the intrinsic special layer structure of Bi2Se3.

Owing to their complex crystal structure and large unit cell compared to conventional metals and alloys, it would be difficult to be deformed by slip deformation.
Hafnium and niobium were chosen as ternary alloying elements because of their smaller atomic size than zirconium and different chemistry between them
In other words, ternary element Nb substitutes for Zr site in the C15 structure and Nb has a smaller atomic radius than Zr.
For the Zr-80Cr-12.5Nb alloy well-defined twin-related structure is observed over the whole microstructure in the C15 Laves phase.
The microstructures of the ternary alloys containing Hf and Nb are duplex structures consisting of Laves phase and Cr-rich bcc solid solution.

The temperature in the core of concrete structure increases obviously at early age, so the hydration of composite binders containing mineral admixtures are greatly enhanced in real concrete structure.
Materials and Structures, 2002,Vol.35,15-21 [2] S.
Materials and Structures.2002 Vol.35, 76-79 [5] V.Waller,L.DAloïa,F.Cussigh,S.Lecrux.
Cement Chemistry(2nd edition).
Materials and Structures, Vol.35, 2002, 389-394

This approach provides an effective way to fabricated large area, nano-scale periodic structures with hydrophobic property and surfaces with nano-tip structures in various periods can be achieved.
(a), (b) structures on photoresist after LIL, (c), (d) structures on silicon wafer after RIE.
The results show that the surface structure fabricated by LIL can change the surface wetting property from hydrophilic to hydrophobic by decreasing the period of surface structures.
Table 1 The solid fraction fPR and fSi with different period surface structure together with the calculated contact angle on Si surface with transferred structures.
Dill and ADJ Haymet, A view of the hydrophobic effect, The Journal of Physical Chemistry B 106 (2002) 521-533