采用双源气溶胶辅助化学气相沉积法制备了Al掺杂Zn O薄膜。研究了不同的乙醇和甲醇溶液比例对AZO薄膜各种性能的影响。通过紫外-可见光吸收光谱、原子力显微镜、扫描电子显微镜和X射线衍射对薄膜性能进行表征。结果表明通过使用双源AACV...采用双源气溶胶辅助化学气相沉积法制备了Al掺杂Zn O薄膜。研究了不同的乙醇和甲醇溶液比例对AZO薄膜各种性能的影响。通过紫外-可见光吸收光谱、原子力显微镜、扫描电子显微镜和X射线衍射对薄膜性能进行表征。结果表明通过使用双源AACVD法可以获得具有明显(002)择优取向AZO薄膜,并且在15 m L乙醇和20 m L甲醇时具有最佳的结晶性能,同时具有最优的光电学性能。不同乙醇和甲醇比例下薄膜的形貌不同。展开更多
Well aligned nanotubes with diameter of 30—50 nm have been synthesized on a porous alumina template by microwave plasma enhanced chemical vapor deposition (MW PECVD). By this means, the control over either diameter o...Well aligned nanotubes with diameter of 30—50 nm have been synthesized on a porous alumina template by microwave plasma enhanced chemical vapor deposition (MW PECVD). By this means, the control over either diameter or length of the nanotubes could be realized. The hollow structure and vertically aligned features have been verified by scanning electron and transmission electron microscopic images. In comparison with the reported fabrication methods, lower synthesis temperature (below 520 ℃) and simpler process (no negative dc bias applied) have been achieved, which could be of great importance for both theoretical research and pratical applications.展开更多
3C-SiC又称β-SiC,有着优异的耐高温、耐腐蚀、耐辐照性能,是反应堆这类复杂环境中的理想材料。近年来,一维碳化硅纳米线材料成为碳化硅材料研究领域的热门研究方向,同时也面临加工手段匮乏、加工难度大的问题。我们通过化学气相沉积法...3C-SiC又称β-SiC,有着优异的耐高温、耐腐蚀、耐辐照性能,是反应堆这类复杂环境中的理想材料。近年来,一维碳化硅纳米线材料成为碳化硅材料研究领域的热门研究方向,同时也面临加工手段匮乏、加工难度大的问题。我们通过化学气相沉积法成功制备了含有高密度堆叠层错的3C-SiC纳米线,并采用扫描电子显微镜(Scanning Electron Microscope,SEM)、透射电子显微镜(Transmission Electron Microscope,TEM)、X射线衍射(X-Ray Diffraction,XRD)以及拉曼光谱(Raman spectrum)等多种手段对制备出来的碳化硅纳米线进行了微观结构表征,揭示了其独特的微观形态和晶体结构特征;进一步研究了超声裁剪碳化硅纳米线,利用“气泡-射流”模型结合碳化硅纳米线的形态解释了碳化硅纳米线的超声裁剪过程,探索了碳化硅纳米线的直径、强度、缺陷等对其在超声过程中断裂行为的影响。本研究为碳化硅纳米线的超声裁剪加工和纳米线的强度研究提供了新的视角,对于未来碳化硅纳米线在核能领域的应用具有重要的意义。展开更多
文摘采用双源气溶胶辅助化学气相沉积法制备了Al掺杂Zn O薄膜。研究了不同的乙醇和甲醇溶液比例对AZO薄膜各种性能的影响。通过紫外-可见光吸收光谱、原子力显微镜、扫描电子显微镜和X射线衍射对薄膜性能进行表征。结果表明通过使用双源AACVD法可以获得具有明显(002)择优取向AZO薄膜,并且在15 m L乙醇和20 m L甲醇时具有最佳的结晶性能,同时具有最优的光电学性能。不同乙醇和甲醇比例下薄膜的形貌不同。
文摘Well aligned nanotubes with diameter of 30—50 nm have been synthesized on a porous alumina template by microwave plasma enhanced chemical vapor deposition (MW PECVD). By this means, the control over either diameter or length of the nanotubes could be realized. The hollow structure and vertically aligned features have been verified by scanning electron and transmission electron microscopic images. In comparison with the reported fabrication methods, lower synthesis temperature (below 520 ℃) and simpler process (no negative dc bias applied) have been achieved, which could be of great importance for both theoretical research and pratical applications.
文摘3C-SiC又称β-SiC,有着优异的耐高温、耐腐蚀、耐辐照性能,是反应堆这类复杂环境中的理想材料。近年来,一维碳化硅纳米线材料成为碳化硅材料研究领域的热门研究方向,同时也面临加工手段匮乏、加工难度大的问题。我们通过化学气相沉积法成功制备了含有高密度堆叠层错的3C-SiC纳米线,并采用扫描电子显微镜(Scanning Electron Microscope,SEM)、透射电子显微镜(Transmission Electron Microscope,TEM)、X射线衍射(X-Ray Diffraction,XRD)以及拉曼光谱(Raman spectrum)等多种手段对制备出来的碳化硅纳米线进行了微观结构表征,揭示了其独特的微观形态和晶体结构特征;进一步研究了超声裁剪碳化硅纳米线,利用“气泡-射流”模型结合碳化硅纳米线的形态解释了碳化硅纳米线的超声裁剪过程,探索了碳化硅纳米线的直径、强度、缺陷等对其在超声过程中断裂行为的影响。本研究为碳化硅纳米线的超声裁剪加工和纳米线的强度研究提供了新的视角,对于未来碳化硅纳米线在核能领域的应用具有重要的意义。
