李薰讲座奖
·李薰讲座奖获奖资料
您现在的位置:首页 > 国际交流 > 李薰讲座系列 > 李薰讲座奖 > 李薰讲座奖获奖资料
李方华院士荣获2012年度李薰材料科学讲座系列讲座奖
 
2012-10-16 | 文章来源:李薰奖办公室        【 】【打印】【关闭

Topic: Applications of HRTEM based on the image contrast theory and image analysis methods developed in IP, CAS

Speaker: Prof. FangHua Li

     Academician of CAS,

     Institute of Physics Chinese Academy of Science

Abstract:

The method of trial and error, or say, the model method is widely used in the structure determination for both perfect and defect crystals in HRTEM. In order to develop a new approach that affords a higher resolution and better quality to the determined structure details than the model method, the researchers in Institute of Physics, the Chinese Academy of Sciences have engaged in developing the image contrast theory and image analysis methods, and applying them into practice for more than three decades. The results of this research will be illustrated following a short introduction that will bring us to the early days of HREM to explain the goal of studies. A series of examples for determining the core structures of defects in semiconductors by means of deconvolution processing is given to show how the obtained structure details are enriched and the resolution of determined structures is improved comparing with the use of the model method. Another series of examples are about the ab initio crystal structure determination for the ordinary three dimensional periodic structures as well as the incommensurate modulated structures carried out by the deconvolution and phase extension. It is shown that the image taken with an arbitrary defocus condition can be transform to the structure image and the resolution can be enhanced up to the diffraction limit, for instance, up to 0.1 nm or better for 200 kV conventional microscopes. The image contrast theory and image analysis methods developed in the present research will be introduced briefly after the examples.

 

李方华院士个人简历

文档附件

相关信息
·李薰奖获得者中科院物理所李方华院士访问金属所
联系我们 | 友情链接
地址: 沈阳市沈河区文化路72号 邮编: 110016
中国科学院金属研究所 版权所有 辽ICP备05005387号-1

官方微博

官方微信