题目: In Situ TEM Growth, Manipulation, and Properties of Nanostructures

报告人：Dr. Dai-Ming Tang (tang.daiming@nims.go.jp)

单位：International Center for Young Scientists (ICYS), International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

时间：6月13日（周五）9:00-11:30

地点：李薰楼468会议室

In Situ TEM Growth, Manipulation, and Properties of Nanostructures

In situ transmission electron microscopy (TEM) combines the atomic resolution of TEM with the high precision manipulation of scanning probing microscopy (SPM), therefore it has the advantage of providing direct, real time and high resolution characterizations of the materials and processes. Here, I present our progresses in the investigations on the growth mechanism, structural manipulation and property measurements of nanostructures by using the in situ TEM probing technique. (1) Firstly, the growth processes of carbon nanotubes (CNTs) from various catalysts were studied by designing a “nanofurnace”, where catalyst nanoparticles (NPs) had been placed in a multiwall CNT “tubular furnace”, and a high temperature was obtained by Joule heating in the specimen chamber of a TEM. (2-4) Secondly, the mechanical properties of 1D and 2D structures were investigated and the mechanical behaviors were found to be dependent on the geometry, defects and loading conditions. (5-9)

References:

1. D.-M. Tang et al., Proc. Natl. Acad. Sci. USA 107, 9055 (2010).
2. D. M. Tang et al., Carbon 47, 670 (2009).
3. B. Liu et al., J. Am. Chem. Soc. 133, 197 (2011).
4. D. M. Tang et al., Scientific Reports 2, 971 (2012).
5. D.-M. Tang et al., ACS Nano 8, 292 (2014). 
6. D. M. Tang et al., ACS Nano 5, 7362 (2011).
7. D.-M. Tang et al., Nano Lett. 12, 1898 (2012).
8. D.-M. Tang et al., Nano Lett. 13, 1034 (2013).
9. D.-M. Tang et al., Nature Communications 5, 3631 (2014).