Center for Functional Nanomaterials Seminar

"HR-TEM of Carbon Network - Defects and Edge Structures of Low dimensional Carbon"

Presented by Kazutomo Suenaga, Natl. Inst. Adv. Indust. Sci. Tech., Tsukuba, Japan

Monday, August 3, 2009, 11:00 am — Bldg. 735 Conf Rm B

The diversified properties of carbon nano-structures (nanotubes, fullerenes, graphenes and their derivatives) are related to their polymorphic arrangement of carbon atoms. Therefore the direct observation of carbon network, such as topological defects or vacancies, is of great consequence in both scientific and technological viewpoints in order to predict the physical and chemical properties. Here we will show our recent progress in electron microscopy and its in situ investigations to visualize the various atomic defects in the low-dimensional carbon nanostructures. The lip-lip interactions of the open edges of carbon nanotubes (1), the closed edges of heated graphenes (2), the mono-vacancies in h-BN single sheet (3), the row-by-row removal of graphene nanoribbons (4) and the spectroscopy of single dopants (5) will be demonstrated.

(1) C. Jin, H. Lan, K. Suenaga, L.-M. Peng and S. Iijima, Phys. Rev. Lett.,
(2008) 101 (2008) 176102
(2) Z. Liu, K. Suenaga, P. Harris and S. Iijima, Phys. Rev. Lett., 102
(2009) 015501
(3) C. Jin, F. Lin, K. Suenaga and S. Iijima, Phys. Rev. Lett., 102 (2009)
195505
(4) C. Jin, H. Lan, L. Peng, K. Suenaga and S. Iijima, Phys. Rev. Lett., 102
(2009) 205501
(5) 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, Nature Chemistry (2009) (in print)

Hosted by: Yimei Zhu

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