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The study on the structural and optical properties of C-F codoped Zinc oxide from ab initio calculations Chunying Zuo1, a, Jing Wen 1,b , Cheng Zhong 2,c and Zhongcheng Wu3,d 1 College of Arts and Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China 2 College of Chemistry and Molecular Sciences of Wuhan University, Wuhan 430072, China 3 Institute of Nuclear Physics and Chemistry of CAEP, Mianyang,621900 , China achunyingzuo@126.com, b wenj3008@126.com,czhongcheng001@126.com,dZC Wu@126.com Keywords: structural properties; optical properties; ab initio calculations; complex dielectric function Abstract.
Computational method The ideal ZnO has the hexagonal wurtzite structure at ambient temperature and pressure and it belongs to P63mc space group and C6v-4 symmetry.
Further insights into the effects of C-F doping on the electronic structure of ZnO can be achieved from the calculation of optical properties.

Anaerobic Biohydrogen Production by the Mixed Culture with Mesoporous Fe3O4 Nanoparticles Activation Wei Zhao1,a, Jie Zhao1,b, Guodong Chen1,c, Rui Feng1,d, Jian Yang1,e, Yanfang Zhao2,f, Qin Wei2,g, Bin Du*1,2,h and Yongfang Zhang*1,i 1School of Resources and Environment, University of Jinan (UJN), Jinan 250022, P R China 2School of Chemistry and Chemical Engineering, University of Jinan (UJN), Jinan 250022, P R China azhaowei43420@126.com, bzhaojie880202@126.com, cchengd_1987@163.com, dfengrui_free@126.com, eyangjian_ujn@126.com, fzhyf2006@163.com, gjndxweiqin@gmail.com, hdubin61@gmail.com, *correspondence author, ichm_zhangyf@ujn.edu.cn,*correspondence author Keywords: anaerobic fermentation, biohydrogen, mesoporous Fe3O4 nanoparticle, alkaline shock.
Nanoparticles are of great scientific interest as they are effectively a bridge between bulk materials and atomic or molecular structures [3].
In a typical synthesis of monodisperse Fe3O4 nanoparticles with mesoporous structure [8], FeCl3·6H2O (1 g) was dissolved in ethylene glycol (27.5 mL), followed by the addition of sodium acetate (3 g) and ethylenediamine (10 mL).
Klabunde: Nanoscale Materials in Chemistry (Wiley-Interscience: New York, 2001)

Introduction for Nano materials Physical academic considers, when material particles decrease unceasingly, for example, when electron wavelength alternates function to coincident size, a physics limitation would appear, at that time, traditional physics principle would not exist, and that appeared light, electromagnetism, chemistry and mechanical function strange transformation, which constitutes new “meson physics” field.
It makes solid solubility of limit solid solution strengthened, sintering temperature reduced, chemistry activity amplified and corrosion resistance enhanced.
Material having Nano structure intensity is in contrast to grain size.
It is size 1mm—100mm particle or crystal dispersed compounded or added else packaging material to make Nano packaging material, which has Nano structure units.

And the comparison was done on synthesis methods, structure, Au loading and distribution of Au nanoparticles.
Low-angle XRD pattern shown in Fig.1 implied that the mesoporous structure of SBA-15 or Al-SBA-15 was controlled and kept well, reflecting that these materials have a highly long-range-ordered properties.
Yamada: Chemistry Letters Vol. 16 (1987),P. 405
Haruta: The Journal of Physical Chemistry B Vol. 109 (2005),P. 3956

Results and Discussion Characterization of Material The crystal structures of the samples were characterized using XRD.
It can be concluded that calcium titanate loaded on the silica gel G had a perovskite structure.
Journal of Solid State Chemistry 178 (2005), p. 2867
Progress in Chemistry. 17(2005), p.1019

Special properties of ADI are given by unique structure of matrix which is created by acicular ferrite and retained austenite.
The structure of ADI is obtained by exactly controlled process of heat treatment of nodular cast iron [4].
Heating Figure 2: Heat treatment diagram v Austempering heat treatment for IADI The heat treatment parameters and chemistry requirements for IADI are different from ADI.
The amount of austenite is determined by the chemistry of the alloy and the temperature.

Further modification on zinc phosphate glass with lead and bismuth were measured by FT-IR spectroscopy for its structure and bonding [6].
FT-IR measurement only done on undoped samples since doping at low percentage does not alter the network structure.
Dimitrov: Physics and Chemistry of Glass Vol. 42 (2001), p.103-111 [5] E.
Ayachit: Materials Chemistry and Physics Vol. 133 (2012) p. 249-252 [7] L.

Spinel Structures The conventional unit cell of the CoFe2O4 spinel structure contains eight formula units, and it is cubic and belongs to the Fd3m space group (227).
It should be noted that the spinel is a relatively open structure since the cations only occupy around 33% of the octahedral and tetrahedral voids [16].
The primitive unit cell of the normal and inverse spinel structure consists of a hexagonal cell (see Fig.1) with two CoFe2O4 formula units.
In the case of x=0.25, 0.5 and 0.75, a supercell containing four CoFe2O4 formula units has been used to model these spinel structures.
According to our total energy calculations, the most stable structure is the inverse spinel structure, which is in agreement with the experimental findings [9-11] and other theoretical results [13, 14].

Its novel structure consists of a three-way electromagnetic microvalve for gas flow control which is connected with gas inlet microchannel for the actuator.
The structure of the pneumatic actuator with a normally closed microvalve is shown in Fig 1.
Design the structure by CAD software and print it onto a film using a high resolution inkjet printer (Stylus Photo R2000, Seiko Epson Corporation, Suwa, Janan) as a photomask.
We can see detailed information about structure and working mechanism of the microvalve in reference [29].
Lee: Twelfth international conference on miniaturized systems for chemistry and life sciences, California, USA (2008) [18] F.

Thermal evaporation has been widely used due to its simplicity, inexpensive and can produce high quality structures [10-12].
It was found that the produced thin film is strongly depends on its microstructure, composition, atomic structure, local chemistry of interfaces and crystal defects which form during the fabrication process [13].
Since there is little information available on PL properties especially on SnO2 structures growth using low O2 concentration.
Three-zone tube furnace was used to prepare the SnO2 structures.
The sharp peaks observed indicate good crystalline structures were obtained.