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| 1 | Microwave absorption of aluminum/hydrogen treated titanium dioxide nanoparticles显示文摘Interactions between incident electromagnetic energy and matter are of critical importance for numerous civil and military applications such as photocatalysis,solar cells,optics,radar detection,communications,information processing and transport et al.Traditional mechanisms for such interactions in the microwave frequency mainly rely on dipole rotations and magnetic domain resonance.In this study,we present the first report of the microwave absorption of Al/H2 treated TiO_(2) nanoparticles,where the A_(l)/H_(2) treatment not only induces structural and optical property changes,but also largely improves the microwave absorption performance of TiO_(2) nanoparticles.Moreover,the frequency of the microwave absorption can be finely controlled with the treatment temperature,and the absorption efficiency can reach optimal values with a careful temperature tuning.A large reflection loss of58.02 dB has been demonstrated with 3.1mm TiO_(2) coating when the treating temperature is 700℃.The high efficiency of microwave absorption is most likely linked to the disordering-induced property changes in the materials.Along with the increased microwave absorption properties are largely increased visiblelight and IR absorptions,and enhanced electrical conductivity and reduced skin-depth,which is likely related to the interfacial defects within the TiO_(2) nanoparticles caused by the Al/H2 treatment. | Michael Green Peng Xiang Zhanqiang Liu James Murowchick Xinyu Tan Fuqiang Huang Xiaobo Chen | 2019 | Journal of Materiomics2019，5，1： | 3 |
| 2 | Microwave absorption of magnesium/hydrogen-treated titanium dioxide nanoparticles显示文摘Interactions between materials and electromagnetic irradiations in the microwave frequency are critical for many civil and military applications, such as radar detection, communications, information processing and transport et al. Dipole rotations or magnetic domain resonance are the mainly traditional mechanisms for microwave absorption. The recent finding of the excellent microwave absorption from hydrogenated TiO2 nanoparticles provides us an alternative approach for achieving such absorption, by manipulating the structural defects inside nanoparticles through hydrogenation. In this study, we demonstrate that the microwave absorption can be not only achieved but fine-tuned with TiO2 nanoparticles thermally treated in a Mg/H2 environment. Their position and efficiency can be effectively controlled by the treating temperature. Specifically, the microwave absorption position shifts to the lower frequency region as the treating temperature increases, and there seems to exist an optimal treating temperature to obtain the maximum efficiency, as the absorbing efficiency first increases, and then decreases, with the increase in treatment temperature. Therefore, this study enriches our knowledge and understanding microwave absorption from TiO2-based nanomaterials which may inspire new ideas on other systems to enhance their performance as well. | Michael Green Anh Thi Van Tran Russell Smedley Adam Roach James Murowchick Xiaobo Chen | 2019 | Nano Materials Science2019，1，1： | 3 |
| 3 | Cyclic varia- tions of sulfur isotopes in Cambrian stratabound Ni-Mo- (PGE Au) ores of southern China显示文摘 | Murowchick J B Coveney R M Grauch | 1994 | Geochimiea et Cosmo- chimica Acta1994，58，7： | 1 |
| 4 | Cyclic variations of sulfur isotopes in Cambrian stratabound Ni-Mo (PGE-Au) ores of southern China 显示文摘 | Murowchick J B Coveney R M Grauch R I Eldridge C S Shehon K L | 1994 | Geochim Cosmochim Acta1994，58，： | 1 |
| 5 | Sedimentary exha/ative Nickel-Molybdenum ores in south China 显示文摘 | Lott D A Coveney R M Murowchick J B Grauch R I | 1999 | Economic Geo/ogy1999，94，： | 1 |
| 6 | Field relations, origins, and resource implications for platiniferous molybdenum-nickel ores in black shales of South China显示文摘 | COVENEY R M MUROWCHICK J B GRAUCH R I | 1992 | Exploration and Mining Geology1992，1，1： | 1 |
| 7 | Gold and platinum in shales with evidence against extraterrestrial sources of metals 显示文摘 | Coveney R M Murowchick J B Grauch R I Michael D Glascock D Denison J D | 1992 | Chemical Geology1992，99，： | 1 |
| 8 | Rhenium and osmium isotopes in black shales and Ni-Mo-PEG-rich sulfide layers, Yukon Territory, Canada, and Hunan and Guizhou provinces, China 显示文摘 | Horan M F Morgan J W Grauch R I Coveney Jr R M Murowchick J B Hulbert L J | 1994 | Geochim et Cosmochim Acta1994，58，1： | 1 |
| 9 | Dual origins of lode gold deposits in the Canadian Cordillera显示文摘 | Nesbitt B E Murowchick J R Muehlenbachs K | 1986 | Geology1986，14，： | 1 |
| 10 | Effects oftemperature and degree of supersaturation on pyrite morphology显示文摘 | Murowchick J B Barnse HL | 1987 | American Mineralogists1987，72，： | 1 |
| 11 | Cyclic variations of sulfur isotopes in Cambrian strata bound Ni-Mo- (PGE-Au) ores of southern China显示文摘 | Murowchick J B Coveney R M Grauch R I | 1994 | Geochimica et Cosmo- ehimica Acta1994，58，7： | 1 |
| 12 | Rhenium and osmium isotopes in black shales and Ni-Mo-PGE rich sulfide layers,Yukon Territory,Canada,and Hunan and Guizhou province,China显示文摘 | Horan M F Morgan J W Grauch R I Coveney R M Jr Murowchick J B Hulbert L J | 1994 | Geochimca et Cosmochimica Acta1994，58，1： | 1 |
| 13 | Cyclic variations of sulfur isotopes in Cambrian strata bound Ni-Mo- (PGE-Au) ores of southern China 显示文摘 | Murowchick J B Coveney R M Jr Grauch R I | 1994 | Geochimica et Cosmo- chimica Acta1994，58，7： | 1 |
| 14 | Effects of temperature and degree of supersaturation on pyritemorphology显示文摘 | Murowchick J B Barnos H L | 1987 | Am Mineralogist1987，172，1112： | 1 |
| 15 | Effects of temperature and de-gree of supersaturation on pyrite morphology显示文摘 | Murowchick J B Barnes H L | 1987 | AmericanMineralogist1987，72，： | 1 |
| 16 | Gold and platinum inshales with evidence against extraterrestrial sources of metals显示文摘 | Coveney R M Murowchick J B | 1992 | Chemical Geology1992，99，13： | 1 |
| 17 | Effects of temperature and degree of supersaturation on pyrite morphology显示文摘 | Murowchick J B Barnse H L | 1987 | American Mineralogy1987，72，： | 1 |
| 18 | Effects of temperature and degree of supersaturation on pyrite morphology 显示文摘 | Murowchick J B Barnos H L | 1987 | Am Mineralogist1987，172，1112： | 1 |
| 19 | Field rela-tions, origins, and resource implications for platiniferous mo-lybdenum-nickel ores in black shale of South China显示文摘 | Coveney R M Murowchick J B Grauch R I | 1992 | Explo-ration and Mining Geology1992，1，1： | 1 |
| 20 | Sedimentaryexhalative nickel-molybdenum ores in South China 显示文摘 | Lott D A Coveney R M Murowchick J B | 1999 | Eco-nomic Geology1999，94，7： | 1 |
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