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| 1 | Study on growing thick AlGaN layer on c-plane sapphire substrate and free-standing GaN substrate显示文摘In this study,the thick AlGaN epilayers have been grown on the c-plane sapphire substrate and the free-standing GaN substrate using low-temperature AlN nucleation layers by low-pressure metal-organic chemical vapor deposition(LPMOCVD).High resolution X-ray diffraction(HRXRD),atom force microscopy(AFM),scanning electron microscopy(SEM),photoluminescence(PL) and Raman scattering measurements have been employed to study the crystal quality,threading dislocation density,surface morphology,optical properties and phonon properties of thick AlGaN epifilms.The results indicate that AlGaN epifilms crystal quality can be improved greatly when grown on the free-standing GaN substrate.We calculated the threading dislocation density and found that thick AlGaN epifilm grown on the free-standing GaN substrate is much lower in total threading dislocation density than that grown on the sapphire substrate,although the surface morphology is rougher than that of sapphire substrate. | WANG DangHui ZHOU Hao ZHANG JinCheng XU ShengRui ZHANG LinXia MENG FanNa AI Shan HAO Yue | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，12： | 3 |
| 2 | Effect of QPQ nitriding time on wear and corrosion behavior of 45 carbon steel显示文摘 | Wei Cai Fanna Meng Xinyan Gao Jing Hu | 2012 | Applied Surface Science2012，，： | 3 |
| 3 | Proton irradiation effects on HVPE GaN显示文摘GaNs grown by hydride vapor phase epitaxy(HVPE) were irradiated by protons with different fluences.The changes of surface topography of as-grown and irradiated samples were characterized by atomic force microscopy(AFM).The crystal quality and optical properties of GaN films were examined by the variations of the micro-Raman and photoluminescence(PL) spectra with proton fluence.It was observed that the surface became a little more rough after irradiation.The Raman spectra indicated that the strain of materials and carrier concentration were not affected by the proton injection.The full-width at half-maximum(FWHM) of E 2 high phonon mode narrowed,which was consistent with the FWHM of PL near-band-edge emission(BE).The spectra of yellow luminescence and blue luminescence normalized to the intensity of BE demonstrated a little increase of Ga vacancy and a large decrease of O N,which may be the main reason for the change of optical properties. | LU Ling HAO Yue ZHENG XueFeng ZHANG JinCheng XU ShengRui LIN ZhiYu AI Shan MENG FanNa | 2012 | Science China(Technological Sciences)2012，55，9： | 2 |
| 4 | Effect of QPQ nitriding time on wear and corrosion behavior of 45 carbon steel显示文摘 | Wei Cai Fanna Meng Xinyan Gao etc | 2012 | Applied Surface Science2012，，261： | 1 |
| 5 | Effect of QPQ nitriding time on wear and corrosion behavior of 45 carbon steel显示文摘 | Wei Cai Fanna Meng Xinyan Gao Jing Hu | 2012 | Applied Surface Science2012，，： | 1 |
| 6 | Solvothermal synthesis and H2S gas sensing characteristics of ZnO nanorods显示文摘 | Meng Fanna Zhao Guogang Zhang Haijun | 2013 | Nanoscience and Nanotechnology Letters2013，9，5： | 1 |
| 7 | Cloning and characterization of the DHDPS gene encoding the lysine biosyn- thetic enzyme dihydrodipocolinate synthase from Zizania latifolia (Griseb) 显示文摘 | Kong Fanna Jiang Shaomei Meng Xiangbing | 2009 | Plant Mol Biol Rep2009，27，2： | 1 |
| 8 | Effect of QPQ nitriding time on wear and corrosion behavior of 45 carbon steel显示文摘 | Cai Wei Meng Fanna Gao Xinyan | 2012 | Applied Surface Science2012，261，： | 1 |
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