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Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Comparative study of porosity in low-k SiOCH thin films obtained at different deposition conditions Roberto S.
KARWASZ 2, Antonio ZECCA 2 1 Dipartimento di Fisica, Università di Trento, and Istituto Nazionale per la Fisica della Materia 38050 Povo (TN), Italy, brusa@science.unitn.it 2 Dipartimento di Fisica, Università di Trento, Istituto Nazionale per la Fisica della Materia 38050 Povo (TN), Italy Keywords: ortho-positronium, SiOCH film, low dielectric constant materials, porosity Abstract : The porosity in SiOCH films deposited by plasma enhanced chemical vapor deposition (PECVD) and then thermal treated up to 900 °C, has been depth profiled by Positron Annihilation Spectroscopy (PAS).
Introduction After the introduction of Cu as conductive material in microelectronic device construction, in the next years it will be necessary to find out materials with a dielectric constant k decreasing from the present values (2.7-2.9) to values around 1.9 in 2010 [International Technology Roadmap for Semiconductors (2002), and Ref. 1].
This is a very difficult task to be achieved and several materials, from organic-inorganic polymers to silica based materials, are under investigation.
A way to reduce density is to introduce pores in the dielectric materials.

TiO2 based materials have received more and more attention because of the high photocatalytic activity and stability.
Chemistry of Materials, 2010. 22(3): 612-623
Understanding TiO2 Photocatalysis: Mechanisms and Materials[J].
Chemistry of Materials, 2001. 13(12): 4624-4628
Journal of Materials Chemistry A, 2013. 1(2): 388-394

Li, ZnO disks loaded with reduced Graphene oxide for the photodegradation of methylene blue, New Carbon Materials, 28(6) (2013), 408–413 [9] M.
Myoung, Origin of p-type conductivity for N-doped ZnO nanostructure synthesized by MOCVD method, Materials Letters, 161 (2015), 701–704 [13] H.
Samdarshi, Influence of N-Doping on photocatalytic activity of ZnO nano particles under visible light irradiation, Materials Letters, 134 (2014), 111–114 [15] C.
Das, Microstructural characterization of nanosized Ceria powders by X-ray diffraction analysis, Metallurgical and Materials Transactions A, 42A (2011), 1409-1417 [18] I.
Futikhaningtyas, Optical properties of Zn-doped CeO2 nanoparticles as function of Zn content, Advanced Materials Research, 896 (2014), 108-111

The natural frequency has increased after using the DIMFM method and the more damping materials deleted, the greater the natural frequency, but the maximum change is just 0.11%.
Topological Sensitivity Method for the Optimal Placement of Unconstrained Damping Material in Structures [J], Journal of Vibration Engineering, 16(4): 420-425. (2003)
Topology optimization for constrained layer damping material in structures using ESO method [J], Journal of Chongqing University, 33(8): 1-6. (2010)
Topological optimization for placement of damping material on cylindrical shells [J], Journal of Vibration and Shock, 31(4): 48-52. (2012) [7] O.
The Research and Application of Evolutionary Structural Optimization Based on Element’s Properties Change Method [D], Institute of physics, Chinese Academy of Sciences, (2006).

Introduction Vanadium, as an element, creates many compounds with oxygen, resulting in materials with different structural, optical and chemical properties.
Vanadium oxide material is a heat-sensitive material.
Katsarakis , A Study of the Electrochemical Performance of Vanadium Oxide Thin Films grown by Atmospheric Pressure Chemical Vapour Deposition Solar Energy Materials & Solar Cells 95 (2011) 2842-2847
Zhang Preparation of V2O5 thin film and its optical characteristics, Frontiers of Materials Science in China 3(1) (2009) 44-47
Suresh, Effect of post-growth annealing on the structural, optical and electrical properties of V2O5 nanorods and its fabrication, characterization of V2O5/p-Si junction diode, Materials Science in Semiconductor Processing 41 (2016) 497-507.

Wellmann1 1 Department of Materials Science, Electronic Materials, University of Erlangen-Nürnberg, Martensstrasse 7, 91058 Erlangen, Germany 2 Leibniz Institute for Crystal Growth, Max-Born-Strasse 2, 12489 Berlin, Germany 3 Physics Department, Crystallography and Structural Physics, University of Erlangen-Nürnberg, Staudtstrasse 3, 91058 Erlangen, Germany a philip.hens@ww.uni-erlangen.de Keywords: 3C-SiC, hetero-epitaxy, carbonization, ramp-up, XRD Abstract.
Chaussende et.al., Materials Science Forum, Vols. 615-617 (2009), pp 31-36 [3] Propane; MSDS No. 2710 [Online]; GHC Gerling: Hamburg, Germany, May 2, 2007, www.ghc.com/pdf/2710.006.pdf (accessed July 21, 2009)
Zielinski et.al., Journal of Crystal Growth, Vol. 310, Issue 13 (2008), pp 3174-3182 [6] A.
Severino et.al., Materials Science Forum, Vols. 556-557 (2007), pp 171-174 [7] G.
Wagner et.al., Materials Science Forum, Vols. 615-617 (2009), pp 165-168

Rare earth-based AB5-type alloys have been exploited as negative electrode materials in commercial Ni/MH cells, where A is a rare earth and B a transition metal [7,8].Because Co is costly, AB5 alloys of the type La0.7Mg0.3Al0.3Mn0.4X0.5Ni3.8 (X= Co,Nb) with modification in the B part were used for this study.
Hariprakash: Journal of Power Sources Vol.100 (2001), p. 125
Hong: Journal of Alloys and Compounds Vol. 321(2001), p. 307
Lei: Journal of Alloys and Compounds Vol. 373 (2004), p. 237
Lei: Materials Science Forum Vol. 473-470 (2005), p. 2457

This paper explains that the origin of the technique of cotton cultivation in China needs further demonstration according to historical data and archaeological materials.
Scholars from Shanghai Textile Science and Technology Research Institute proved that this cotton cloth’s cotton fiber was similar to the cotton blanket which was unearthed from Gao tomb of Lanxi, Zhejiang Province in the Southern Song Dynasty (Fig2), as well as the ceiba of modern Hainan Island [3].
Because of these arguments, the origin of the cotton cultivation in China needs further archeological discoveries and demonstrations The Spread of the Technique of Ancient Cotton Cultivation in Ancient China According to the literary texts before Tang Dynasty,[4] the technique of cotton cultivation before Tang Dynasty was mainly popularized in Yunnan, Hainan, Guangdong, Guangxi, Fujian, and Guizhou Provinces, etc. 2.1 The shrub ceiba and Levant cotton in ancient southwest China The ancient southwest area started from the perennial ceiba,[5] which was similar to the cotton described in the Indian archeological materials.
The cottonseed was small with thick quilt and short flock; it was ash black with brownness and well tended appearance, which was identified by Chinese Academy of Agricultural Sciences as cottonseed, namely African cottonseed.
Cultural Relics.1980(6)12-21 [3] Yang Ruji, Studies on a cotton blanket of the Sung Dynasty, Journal of Donghua University(natural science).1979(2)101-108 [4] Hong Yongbin, The cotton production and industry in Yuan Dynasty, the Chinese History of Science and Technology.1984(3)55-63 [5] Wu Guoqiang,Gong Chunsheng, Study on the cotton cultivation techniques in Ancient China, the Chinese Agricultural Archaeology.2011(1)256-258 [6] Sha Biti, Research on the Xinjiang ancient cotton and textile from the archaeological materials, Cultural Relics.1973(10)49-53

Hydrothermal method has been applied to synthesize nanosized materials due to the advantage that the products prepared by this method have well crystalline phase, which benefits to thermal stability of the nanosized materials.
Abo-Farha, Photocatalytic Degradation of Monoazo and Diazo Dyes in Wastewater on Nanometer-Sized TiO2, Journal of American Science, 6 (2010) 130-142
Hameed, Parameters affecting the photocatalytic degradation of dyes using TiO2-based photocatalysts: A review, Journal of Hazardous Materials, 170 (2009) 520-529
Viswanathan, Synthesis, characterization and photocatalytic properties of iron-doped TiO2 catalysts, Journal of Photochemistry and Photobiology A: Chemistry, 108 (1997) 79-84
Verykios, Effects of altervalent cation doping of titania on its performance as a photocatalyst for water cleavage, The Journal of Physical Chemistry, 97 (1993) 1184-1189

Uemori, A model of large-strain cyclic plasticity and its application to springback simulation, International Journal of Mechanical Sciences, 45 (2003) 1687-1702
Yoshida, Elimination of springback of high-strength steel sheet by using additional bending with counter punch, Journal of materials Processing Technology 229 (2016) 199-206
International Journal of Plasticity 45 (2013) 3-20
Ghiotti, Hot stamping of boron steel sheets with tailored properties: A review, Journal of Materials Processing Technology, 228 (2016) 11-24
Yoshida, Elasto-plasticity property of high strength steel sheet at warm temperature and its springback, Key Engineering Materials, 535-536 (2013) 385-388.