奈米平板钻石成长及基材晶向对钻石异质成核影响之研究摘要.PDFVIP

奈異 立 立料 論 奈異 兩 來 度 奈異 利 ( 1100 oC) 奈粒立-粒 量 奈料列 來 奈料 立奈 行{111}輪廓 行110 奈度 20~30 nm 100 nm 2 µm 不 奈不 度 奈 狀(行 ) TEM 奈行 i 不 狀 度六 奈 奈立粒 {111} 110 列 論 論 列狀 利 率 {100}/{111}見 見 {111}/{111} 列論 {100}/{111} 奈狀 論 異 理 Ni3Al 行行 SEM 不論 不 粒不度 利 (EBSD)不 粒 度行 列 {111} 粒度 {110} {100} 度論 論 Ni3Al TEM 來兩不理 理 Ni3Al Ni3Al Ni Al 奈粒 Ni Al 3 3 ii The Growth of Diamond Nano-platelets and Substrate Orientation Effect on Diamond Heterogeneous Nucleation studentHou-Guang Chen AdvisorsDr. Li Chang Abstract The dissertation is divided into two parts. In the first part, we demonstrate growth of a two-dimensional nano-structured diamond in a unique platelet morphology which differs from the usual habit of diamond growing under conventional chemical vapor deposition (CVD) condition. The growth mechanism of the diamond nano-platelets was studied by the electron microscopy. In the second part, we investigate the effect of substrate orientations on diamond heterogeneous nucleation with bias enhanced pretreatment. In the first part of the dissertation, it is shown that a large quantity of a two dimensional nano-structured materials can grow on polycrystalline, nanocrystalline and isolated cubo-octahedral diamond substrates by high temperature microwave plasma CVD. According to the characterization of electron microscopy, these platelet-like nano-materials are identified as single crystalline cubic diamond crystallite.