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Growth Characteristics of AlGaN/GaN HEMTs on Patterned Si (111) Substrates Using Double AlN interlayers by MOCVD Yong WANG1, 2,*, Naisen YU2, Congshun WANG2, and Keimay LAU2 1 National Key Lab on High Power Semiconductor Lasers, Changchun University of Science and Technology, Changchun 130022, China 2 Photonics Technology Center, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China Keywords: MOCVD, AlGaN/GaN HEMT, Patterned Si substrate, Double AlN interlayers Abstract: AlGaN/GaN high electron mobility transistors (HEMTs) were grown on un-patterned, patterned without mask, and patterned with mask Si (111) substrates by metal organic chemical vapor deposition (MOCVD).
Introduction Gallium Nitride (GaN) and related wide bandgap materials have shown unique advantages for applications in optoelectronic devices, high power microwave devices and high temperature electronic devices [1-2].
Materials Science and Engineering. 2002, B93: 77 [6] Zhang B S, Liang H, Wang Y, Feng Z H, Ng K W, and Lau K M.
Journal of Crystal Growth, 2007, 298: 725-730 [7] Wang Y, Yu N S, Deng D M, Li M, Sun F and Lau K M.
SCIENCE CHINA, Physics, Mechanics & Astronomy, 2010, 53(9): 1578–1581 [8] Nitta S, Kashima T, Kariya M, Yukawa Y, Yamaguchi S, Amano H and Akasaki I.

Stabilization of Natural Dyes by High Levels of Antioxidants Dapeng LI1, a, Paul CALVERT1, b, Charlene MELLO2, c, Kenneth MORABITO3, d, Anubhav TRIPATHI3, e, Nina SHAPLEY4, f and Kristin GILIDA4, g 1Department of Materials and Textiles, University of Massachusetts, North Dartmouth, MA 02747 USA 2US Army NSRDEC, Biosciences & Technology Team, Natick, MA 01760 USA 3Division of Engineering & Medical Sciences, Brown University, Providence, RI 02912 USA 4Department of Chemical & Biochemical Engineering, Rutgers University, Piscataway, NJ 08854 USA adli@umassd.edu, bpcalvert@umassd.edu (corresponding author),cCharlene.Mello@us.army.mil, dkenneth_morabito@brown.edu, eanubhav_tripathi@brown.edu, fnshapley@rci.rutgers.edu, gkrgilida@eden.rutgers.edu Keywords: Photostabilization; Natural dyes; UV degradation; Antioxidants Abstract.
Experimental Materials. β-carotene, indigo, methylene blue (MB), 2,6-di-tert-butyl-4-methylphenol (BHT), oxybenzone (98%), (+/-) a-tocopherol, p-benzoquinone (BQ), triethylamine (TEA), chloroform (anhydrous, 99+%), N,N-dimethylformamide (DMF), toluene (99%), acetone (99.5%), polymethyl methacrylate (PMMA, MW=120,000), and polyvinylpyrrolidone (PVP, MW=10,000) were purchased from Sigma-Aldrich and used without further treatment.
Acknowledgements This work is funded by the National Science Foundation (NSF, CBET # 0755926).
References [1] Scott, G., Photodegradation and photostabilization, Journal of Photochemistry. 25 (1984) 83-90
Allen (Eds.), Photochemistry of man-made polymers, Applied Science Publishers LTD, 1979

Experimental Materials A Brasgel clay, provided by Bentonit União Nordeste (BUN), (Brazil), was used during the preparation of the organoclays.
Goss: Applied Clay Science Vol. 27 (2004), p. 179
Valenzuela-Díaz: Materials Research Vol. 8 (2005), p. 77
Zekri: Journal of Petroleum Science and Engineering Vol. 46 (2005), p. 209
Gates: Applied Clay Science Vol. 25 (2004), p. 93.

Thermodynamics of Aluminum Deoxidization Equilibria in GCr18Mo Bearing-Steel Xin Su1,a, Shuqiang Guo2,b, Mengran Qiao3,c, Hongyan Zheng4, Libin Qin5 1-5State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China aserenity2015@shu.edu.cn, bsqguo@shu.edu.cn, cqmr127@163.com Keywords: Aluminum deoxidization equilibrium, Thermodynamic calculation, Activity Abstract.
Acknowledgements This study was financially supported by the Shanghai University and the Joint Funds of the Natural Science Foundation of China (No.
JOURNAL OF IRON AND STEEL RESEARCH, INTERNATIONAL, vol.22(2015), p.905-908
Metallurgical and Materials Transactions B, vol.46(2015), p.1826-1836
[9] Steelmaking Data Sourcebook, The Japan Society for the promotion of Science, The 19th Committee on Steelmaking, Gordon and Breach Science Publishers, New York, (1988): p.38-45

Materials and methods Wood samples The samples of Chinese fir and eucalyptus wood studied in this work were composed of ten trees which were collected from Huangshan, Anhui province and Suixi, Guangzhou province respectively.
Each wood species had their color described by the three variables L∗, a* and b∗ as described in the Materials and Methods.
Wood and Fiber Science, 2005, 37:14–22
Rapid prediction of wood crystallinity in Pinus elliotii plantation wood by near-infrared spectroscopy[J], Journal of Wood Science, 2007, 53:449–453
Wood and Fiber Science, 2002, 34(4):651-656.

Powder Injection Molding Of Ti6Al4V Alloy Xuanhui Qu1a � Shibo Guo2b �Chunfeng Tang 1c�Mingli Qin1d �Xinbo He1e Syed Humail Islam1f 1 School of Materials Science and Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083,P.
China, 2 Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang, P.
Acknowledgements This work was financially supported by National Science Foundation of China, National 863 Program and National 973 Program.
Chinese Journal of Nonferrous Metals, 1998,8(3):436-440

Introduction Composite materials are increasingly being used in the petroleum industry for both offshore and onshore applications.
However, in this shock tube design we focus our attention on composite materials with an operating pressure below 100bar.
JSME International Journal, Series B, 45, 1 (2002) 9-14
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, (2006) 977-982
Journal of Composite Materials 21 (1987) 834-55.

To use fossil fuel for a longer time and use new materials that are not necessarily mixed with fossil fuel, a booster of ether compounds that could be produced from alcohol is needed.
Experimental Materials The chemical used in the experiment were n-propanol, AgNO3, HNO3 65%, HCl 37%, H2O2 20%, CrO3, NaCl, Ca(OH)2, FeCl3·6H2O, acetone, and ammonia which were in p.a. quality from Merck.
References [1] Houdkova, L., Boran, J., Pecek, J., and Sumpela P., 2008, Thermal Science,12, 4, 27-33
[8] Gopal, S. and Smirniotis P.G., 2002, Journal of Catalyst, 205, 231-243
[9] Ma, D., Wang, D., Su, L., Shu, Y., Xu, Y., and Bao, X., 2002, Journal of Catalyst, 208, 260-269

Introduction Many materials added with bisphenol A (BPA) are widely used in industrial product manufacturing for their good corrosion resistance, such as canned food packaging, mineral water bottles, inner coatings of medical equipment, etc.
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Chem. 86 3013 [20] Zhou X, Dai X X, Li J G, Long Y M, Li W F and Tu Y.F. 2015 Materials science and Engineering C 49 579 [21] Wagdy H A, Dinc M and Mizaikoff B 2019 Anal.Methods 31 4034 [22] Cui Z Z, Yin H Y and Nie Q L 2015 Journal of Alloys & Compounds 632 402 [23] Tian J Q, Luo Y L, Li H L, Lu W B, Chang G H, Qin X Y and Sun X.P 2011 Catal.

Introduction Polyoxometalates (POMs) constitute a wide class of inorganic compounds with remarkable chemical, structural and electronic versatility, having high potential for practical applications, namely in the areas of catalysis, materials science and medicine [1,2].
The silica/POM materials were also characterized by scanning electron microscopy.
Fig. 2 shows the IR spectra of two different silica materials containing polyoxotungstates.
Wu: Materials Letters Vol. 56 (2002) p.19
Trindade: Journal of Alloys and Compounds Vol. 374 (2004) p. 344