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X-ray diffraction pattern reveals that the structure of the prepared sample is amorphous in nature while Fourier transform infrared spectrum showed the different vibration bands of the synthesized sample.
It contains about 13 – 29 wt. % inorganic compounds of which 87 – 97 wt. % is silica and this composition depends on the rice variety, soil chemistry, climate, geographic location/origin, crop year and quantity of fertilizer used [2].
Nevertheless, the structure of silica that can be extracted from rice husk is either crystalline or amorphous by controlled burning [7, 8] and is an advantage over other silica sources.

The structure of the oligomer was characterization by FTIR.
Compared to the UV-curable cationic polymerization system[2], many studies on UV-cured coatings have been based on free-radical polymerization system[3,4] and UV-curing chemistry [5~7].
These data indicate that Td of system depends on the main chain structure of resin.

The combination of the CNT structure with semiconductors oxides opens up various application possibilities: water separation for hydrogen generation, degradation of pollutants in aqueous contamination and sewage treatment, photoreduction of CO2 activity in self-cleaning air purification and dyes for solar cells.
The TTP were subjected to heat treatment at 500°C for 1 hour in an electric furnace to obtain a TiO2 phase. 2.1 Characterization The nanocomposites structure was investigated by Raman spectroscopy.
Some authors maintain that the interaction between MWCNTs and semiconductors oxides in nanocomposite materials depends not only on the oxide load, but also on some other aspects, such as particles size, the composition of the oxide crystalline phase and the chemistry on the surface of the nanocomposite [9].

Capabilities of nano-structured materials based on the rapid densification and suppression of grain growth has also been indicated in the several oxide materials such as dense nano-structured anatase with highly preferential orientation[5].
Until now, various nano-structured ceramics have been fabricated by SPS processing.
Further, we successfully fabricated the nano-structured dense alumina[8], and it was found that the nano-structured alumina with the average grain size of about 300nm was obtained in the alumina sintered from the nano-powder(TMDAR, Taimei chemistry Co.
The successful fabrication of nano-structured alumina can be easily applied to synthesize highly transparent alumina.
Further, the layer structure of SPS-consolidated FGM can be designed by stress analysis based on Raman scattering method.

CM is composed of both amorphous and crystalline parts and exhibit a web-like structure.
This structure consists of cellulose microfibrils.
However, as the reaction time reaches 4 h, the cell wall structure has a tendency to be destroyed.
This structure can make the obtained CM become a potential reinforcement for composite materials.
Rojas, Cellulose nanocrystals: chemistry, self-assembly, and applications, Chem.

All SEM images of the "as prepared" samples show a bundled structure and confirm the differences in curvature (see figure 2).
On the contrary, the Sn@CNTs sample shows pronounced defects in the CNTs graphitic structure with drastic changes in their curvature.
The unfilled SWCNTs and MWCNTs present, usually, a straighter structure along the axis while the Sn@CNTs show a bended structure in agreement with SEM (shown above) and TEM images (see ref. [8]).
The presence of this state is interpreted as the result of defects presence in the CNTs structure [23] confirming the findings from the SEM, Raman and STM measurements which indicate the presence of a more defective structure. 500 nm 1 nm 1 nm 10 nm 1 2 3 Figure 4.
Journal of Physical Chemistry B 108 (2004) 18908

El-Kady1,e 1Faculty of Science, Chemistry Department, Al-Azhar University, Nasr City, Cairo Egypt  2Central Metallurgical Research & Development Institute, P.O.
The XRD analysis showed that all substituted (LNFMO-Mˊ) samples are comported with the main structure of undoped (LNFMO) with crystalline disordered spinel Fd-3m structure.
Both glycine and CTAB were employed as chelating and structure directing agents, respectively.
Crystal Structure Fig. 1 shows the XRD patterns of the prepared LNFMO, LNFMO-Cu LNFMO-Mg and LNFMO-Zn nanopowders.
The suppression of LizNi1-zO2 by Fe-doping in LMNO structure also agrees with previous report [8].

At present, GeSn has been experimentally proved to have a direct band gap structure and achieve photoluminescence.
And verified that the band structure of Ge1-xSnx alloy can be transformed from indirect- to direct band and reverse band gap structure.
Kouvetakis, Experimental and theoretical study of deviations from Vegard's law in the Sn x Ge1-x system, Chemistry of materials, 15 (2003) 2511-2519
Al-Mansoury, SiGe nanocrystals core and surface electronic structure from ab initio large unit cell calculations, Micro & Nano Letters, IET, 6 (2011) 386-389
[33] Huang Wenqi, The first principal study on the band structure tuning of GeX(X=Sn,Pb) alloys, University of Chinese Academy of Sciences, 2016

And the average grain sizes and the average lengths of Widmanstätten structure are significantly smaller than that of post-brazed annealing.
Gil studied the effect of cooling rate on βTi, which can vary in length, width and tensile properties of Widmanstätten structure.
For faster cooling rate, the Widmanstätten structure is shorter in length and width, but shows better tensile strength [9].
It was significantly less than 27% and 40% of the Widmanstätten structure of post-brazed and annealed, respectively [4].
Koo, Materials Chemistry and Physics, Vol. 94(1), (2005)131-140

Fracture morphology The phase structure of the blends was investigated using Hitachi S-4700 field emission scanning electron microscope (SEM).
Figure 1 shows the cryofractured phase structure of DNTP/PLA and DNTP/PLA-g-IA blends with DNTP/ PLA-g-IA or PLA ratio varying between 30:70 to 90:10 (w/w).
It has been reported that addition of PEOX improved the interfacial adhesions between SPC/PLA blends resulting to finer structure and homogeneous phase structure [9] Compatibilization showed no clear effect on 30:70 blend ratio (Figure 1. b and b’), this is believed to be due to the overwhelming effect of high PLA content in the matrix.
Industrial & Engineering Chemistry Research, 2012. 51(22): p. 7786-7792
Journal of Macromolecular Science: Part A-Chemistry, 1976. 10(6): p. 1039-1054