【报告时间】2014年10月15日下午14:30—15:30
【报告地点】硅所1号楼1层会议室
【报告题目】Low voltage TEM/STEM for atomic resolution imaging and spectroscopy
【报告人】K.Suenaga, National Institute of Advanced Industrial Science and Technology, Japan
【邀请人】金传洪教授
【报告摘要】
The realization of the spatial resolution (d) down to the wavelength limit (2) can be regarded as the ultimate goal of the electron optics developments in TEM. We have been developing the low-voltage TEM/STEM with the Delta corrector for higher order geometrical aberration correction [1, 2]. Up to now, a simple combination of the Delta corrector with a cold-FEG source can be used to get the atomic resolution at the operating voltage as low as 15 kV before the chromatic aberration does limits the spatial resolution. In this seminar, I summarize our recent progresses of low-voltage TEM/STEM within the scheme triple C project. The current status of our monochromator and chromatic aberration developments will be shown. The examples for atomic defect and edge analysis of low-dimensional materials, such as graphene, h-BN, MoS2, as well as 1D atomic chains [3,4,5], will be also presented.
References
[1] H. Sawada et al., Ultramicroscopy110 (2010) 958-961.
[2] T. Sasaki et al., Journal of Electron Microsc. 59 (2010) S1-S7
[3] J. Warner et al., Nano Letters, 13 (2013) pp. 4820-4826
[4] Y.C. Lin et al., Nature Nanotechnology, 9(2014) pp. 391-396.
[5] R. Senga et al., Nature Materials, (2014) doi:10.1038/nmat4069
[3] This research was supported by JST CREST project (2006-2011) and the Research Acceleration program (2012-).
【报告人简介】
Kazu Suenaga (born in Osaka in 1966) got his Ph.D in Materials Science at the University of Tokyo in 1994. He was a postdoctoral fellow at Ecole Nationale Superieure des Mine de Paris (1994–1997) and at the Solid State Physics Laboratory in the University Paris-Sud (1997–1998). Then he joined the Japan Science and Technology Corporation (JST) as a researcher (1998–2001) and now is a prime senior researcher at National Institute of Advanced Industrial Science and Technology (AIST). He has published over 140 scientif ic papers with more than 6,700 citations. His h-index is 41. A recipient of the Seto award (Japanese Society of Microscopy 2005), winner of the Sir Martin Wood prize (the British Embassy 2006) and grantee par Sumitomo Foundation (1997) and CREST-JST (2006). His major research theme
involves the atomic level characterization of individual molecules by means of electron microscopy and spectroscopy.
List of publications (selected):
1.K. Suenaga, T. Okazaki, E. Okunishi and S. Matsumura “Detection of photons emitted from single erbium atoms in energy-dispersive X-ray spectroscopy”, Nature Photonics, 6 (2012) pp.545-548
2.K. Suenaga and M. Koshino, “Atom-by-atom spectroscopy at graphene edge”, Nature, 468 (2010) pp.1088-1090
3.K. Suenaga, Y. Sato, Z. Liu, H. Kataura, T. Okazaki, K. Kimoto, H. Sawada, T. Sasaki, K. Omoto, T. Tomita, T. Kaneyama, and Y. Kondo, “Visualizing and identifying single atoms using electron energy-loss spectroscopy with low accelerating voltage”, Nature Chemistry, 1 (2009) pp.415 – 418
4.M. Koshino, T. Tanaka, N. Solin, K. Suenaga, H. Isobe and E. Nakamura “Imaging of single organic molecules in motion”, Science 316 (2007) p.853
5.Z. Liu, K. Yanagi, K. Suenaga, H. Kataura and S. Iijima “Imaging the dynamic behaviour of individual retinal chromophores confined inside carbon nanotubes”, Nature Nanotechnology, 2 (2007) pp.422-425
6.K. Suenaga, H. Wakabayashi, M. Koshino, Y. Sato, K. Urita and S. Iijima “Imaging active topological defects in carbon nanotubes”, Nature Nanotechnology, 2 (2007) pp.358-360
7.A. Hashimoto, K. Suenaga, A. Gloter, K. Urita and S. Iijima, “Direct Evidence for Atomic Defects in Graphene Layers”, Nature 430 (2004)pp.870-873“
8.K. Suenaga, M. Tence, C. Mory, C. Colliex, H. Kato, H. Shinohara, K. Hirahara, S. Bandow and S. Iijima “Element-selective single atom imaging”, Science, 290 (2000) pp.2280-2282
9.Y. Zhang, K. Suenaga, C. Colliex and S. Iijima “Coaxial nanocable: Silicon carbide and silicon oxide sheathed with boron nitride and carbon”, Science, 281 (1998) pp973-975
10.K. Suenaga, C. Colliex, N. Demoncy, A. Loiseau, H. Pascard and F. Willaime "Synthesis of nanoparticles and nanotubes with well-separated layers of boron nitride and carbon”, Science, 278 (1997) pp653-655
