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Since then, researchers have focused their attention on the detailed mechanism of photon energy transfer into electrical energy in organic semiconductor materials.
As is well known, the molecular interactions within organic materials are weak compared with that of conventional semiconductors.
An understanding of the HOMO-LUMO structure may encourage broader applications of organic semiconductor materials, such as photodetectors [3,4].
Umar, Fabrication and performance studies of TiO2 and Porphyrin Heterojunction based organic photodetector, Journal of Optoelectronics and Advanced Materials, Vol. 11, No. 11, (2009) 1760-1764
Tsutsui, Effects of Different Materials Used for Internal Floating Electrode on the Photovoltaic Properties of Tandem Type Organic Solar Cell, Jpn.

This research takes Eucalyptus grandis×E.urophylla timber as materials, making them drying with five kinds of schemes.
Material and Equipment Material.
In every experiment, the test materials of eucalyptus wood are piled up into 6×7stack.
(In Chinese) [2] Changxin Feng: Guangdong Agricultural Sciences Vol. 8 (2009), p.147-149.
Langrish: Journal of the Institute of Wood Science Vol. 16(6) (2005), p.347-362

TiO2 hollow sphere was synthesized by hydrothermal method using Trifluoroacetic acid (TFA) and Ti (SO4)2 as raw materials.
In this work, TiO2 hollow spheres were synthesized template-free by hydrothermal method using Trifluoroacetic acid (TFA) and Ti (SO4)2 as raw materials.The photocatalytic performance of TiO2 hollow spheres for the Hg0 photocatalytic oxidation removal from coal-fired flue gas was investigated.
Acknowledgments This work was partially sponsored by Shanghai Science and Technology Development (12dz1201702, 11dz1203400) References [1] T.D.
[5] Jiaguo Yu, Lei Shi, One-pot hydrothermal synthesis and enhanced photocatalytic activity of trifluoroacetic acid modified TiO2 hollow microspheres, Journal of Molecular Catalysis A: Chemical 326 (2010) 8–14
Journal of Physical Chemistry C,2009,113,6743-6750.

The Materials Studio package was used, specifically the program CASTEP, utilizing Perdew Burke Ernzerh of exchange-correlation pseudo-potentials.
To this end, we used a novel method, so-called materials calculation, to study the crystal surface of α-alumina.
All the face energy calculation were carried out using the Castep module in Materials Studio, using the Geometry Optimization task in Castep.
The XRD spectrum indicates that the particles areα-Al2O3. the explantion for the experiment result as below which has been accepted by materials scientist.
Ameri Mahabad, Economical synthesis of nanocrystalline alumina using an environmentally low-cost binder[J] Journal of Surface Science, 2007 (13) 2864–2867,

The molybdenum slag contains a large amounts of SiO2, Al2O3, CaO which are very suitable for the preparation of glass ceramic as raw materials.
The 90 wt% slag can be added as raw materials.
Advanced Materials Research Vol. 66(2009), p.37-40 [4] A.
Khater: The use of Saudi slag for the production of glass-ceramic materials.
Journal of Shanghai University(Natural Science Edition) Vol.10(2003), p.410~413 (In Chinese) [9] X.C.

Sol gel method offers a simple and low cost thin film deposition process but it needs soluble type of materials.
These coated films are evaporated on hot plate in order to remove organic materials in the film.
Journal of Materials Science: Materials in Electronics 20(1): 371-375
Materials Science in Semiconductor Processing 11(2008): 6-12
Journal of Physics and Chemistry of Solids 70(2009): 291-297

Up to now, grinding with diamond wheel is the normal technique for machining high hard-brittle ceramics materials [2].
Experimental materials and equipments The commercial reaction sintered Al2O3, Si3N4 and SiC were taken as specimens in the experiment.
The dimension of all experimental materials, respectively, were 45mm, 4mm and 3mm, cut by the CHN300 CO2 laser unit beforehand.
However, since the hard-brittle characteristic of engineering ceramics, the polishing efficiency for ceramics was lower than many other materials.
Zhou: Journal of Hunan University (Natural Science Edition) Vol.29 (2002), p. 61 [3] H.

In order to fabricate the micro components with complex 3D geometries made of variety of engineering materials, traditional mechanical machining techniques have been scaled down from millimeter size range to micrometer and nanometer range.
Moreover, it can process a variety of engineering materials such as metallic alloys, composites, polymers and ceramic materials to form functional devices.
[3] W.Y.Bao, I.N.Tansel: International Journal of Machine Tools and Manufacture, Vol.40, No.15(2000), pp.2175-2192
[4] R.J.Seethaler, I.Yellowley: Journal of Manufacturing Science and Engineering-Transactions of the ASME, Vol.121, No.3(1999), pp. 524-531
Zheng: International Journal of Machine Tools and Manufacture, Vol.43, No.7(2003), pp.687-697

Paper industries consume the production of a large amount of raw materials, a large quantity of water and could easily lead to serious water pollution industries.
Beijing: China science and technology publishing house, 1993
Journal of hubei papermaking, 2006 (4): 32
Journal of three gorges university, 2006, 28 (2): 177
Journal of Sichuan Environment, 2005, 24 (4): 5

In China, steel slag accumulated over 2 milliontons, only 10% [1] of which was used as metallurgic materials, building materials and in other low value added fields, increasing year by year.
Materials and Methods Steel slag was from a local steel plant, and the main chemical composition is: CaO 33.7%, TFe 23.4%, SiO2 12.1%, MgO 9.0%, MnO 3.2%, Al2O3 3.0%, P2O5 1.0%.
And this work was supported by the Program of Hebei Science and Technology Project (12273607) References [1] LI Yan-bo, QIU Li-ping, WANG Guang-wei, et al.
[3] Pratt C, Shilton A N, Pratt S, et al: Environmental Science and Technology. 3296–3301 (2007).p.41
[5] Vinay K J, Yoshikazu K, Akira N, et al: Journal of Hazardous Materials. 156–162 (2008) p.156