Direct Atomic Structure-Analysis and Properties of New Nano- and Solid-Clusters

新型纳米和固体团簇的直接原子结构分析和性质

基本信息

批准号：
11450250
负责人：
OKU Takeo
金额：
$ 9.73万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450250/
关键词：
Fullerene Cluster Carbon BN HREM Atomic Structure Electronic State Firse Principle calculation C

项目摘要

BCN nanocage fullerene materials were synthesized by arc-melting,electron-beam irradiation, chemical reaction, and self-organization. Atomic structures and structural stability of these materials were investigated by HREM, image simulation, EDS, electron energy-loss spectroscopy (EELS), and theoretical calculations. Atomic structure models of BN metallofullerenes with La and Fe atoms were proposed. New tetrahedral and elliptical carbon onions were produced by electron-beam irradiation, and atomic and electronic structure models were proposed. Possibility of hydrogen gas storage was calculated by molecular dynamics, and Ar atoms were stored in the BN nanocage materials. PL and STM measurements of BN nanocapsules at room temperature showed the I-V characteristics with Coulomb staircase-like behavior. SQUID measurement of BN nanocapsules also showed superparamagnetic property. A fabrication technique for self-assembled nanowires and cluster-protected quantum dots at scales under the limit … More s of current lithography was developed. The present work indicates that the new BN and C nanocage fullerene materials with various atomic structure and properties can be produced by various synthesis methods, which are expected as the future nanoscale devices.Advanced new ceramic materials are expected to be available for use as new energy and information materials, on which devices for solving energy and information problems will be based. The properties of these new materials will be strongly dependent on the atomic arrangements, the direct atomic analysis of which will have been contributed to by HREM.In addition to such direct atomic observation, information from such methods as nano-electron diffraction, EELS energy dispersive X-ray spectroscopy (EDX) and electron holography has being combined recently by progress with the electron gun. It will soon be possible to clarify atomic arrangement, composition, electronic state and magnetic structure of the nano-regions in these advanced materials. Less

BCN纳米含量富勒烯材料是通过电弧熔融，电子束照射，化学反应和自组织合成的。通过HREM，图像模拟，EDS，电子损失光谱（EELS）和理论计算研究了这些材料的原子结构和结构稳定性。提出了带有LA和Fe原子的BN金属氟烯的原子结构模型。通过电子束照射产生了新的四面体和椭圆碳洋葱，并提出了原子和电子结构模型。通过分子动力学计算氢气储存的可能性，并将AR原子储存在BN纳米含量中。 BN纳米胶囊的PL和STM测量在室温下显示出具有类似库仑楼梯的行为的I-V特性。 BN纳米胶囊的鱿鱼测量也显示了超磁特性。一种用于自组装的纳米线和受簇保护的量子点的制造技术，在极限下的尺度上……开发了更多的当前光刻。目前的工作表明，可以通过各种合成方法生产具有各种原子结构和特性的新型BN和C纳米级富勒烯材料，这些方法可以作为未来的纳米级设备。预计将作为新的能源和信息材料使用，以便在哪些能源和信息上使用，以解决新的能源和信息材料。这些新材料的特性将在很大程度上取决于原子排列，直接的原子分析将由HREM促成HREM。除了直接原子观察，来自纳米电子衍射等方法的信息，EELS能量分散性分散X射线X射线光谱（EDX）和电子Holography最近与Elect gun and Electon一起进展。很快就可以阐明这些高级材料中纳米区域的原子排列，组成，电子状态和磁性结构。较少的