Prof. Sumio Iijima

• Sunday, August 14 - 19:30 hrs.

Professor (Meijo University),
Director (AIST/NRC),
Senior Research Fellow (NEC Co.),
Distinguished University Professor (Nagoya University)

Sumio Iijima is a professor at Meijo University, Nagoya, where he joined in 1999, while he is also a director of the Nano-tube Research Center at AIST in Japan and contributes as a Senior Research Fellow at NEC. After graduating from Tohoku University, he moved to Arizona State University where he developed high-resolution transmission electron microscopy (HRTEM) (1970-1982). In 1982 he returned to Japan and worked for 5 years with the Japanese government research project (ERATO) on nano-particles, then joined the NEC fundamental research laboratories in 1987. In 1991 he discovered carbon nanotubes that have initiated nano-material science and nanotechnology.

Recognition:

Bertram Eugene Warren Diffraction Physics Award [USA] (1976), Nishina Memorial Award (1985), Asahi Award (1997), J. C. McGroddy Prize for New Materials [USA] (2002), Agilent Europhysics Prize (2002), Benjamin Franklin Medal in Physics (2002), Japan Academy Award and Imperial Award (2002), Person of Cultural Merits (2003), Fujihara Award (2007), Foreign Associate of The National Academy of Sciences (2007), Balzan Prize for Nanoscience [Italy-Switzerland] (2007), The Kavli Prize in Nanoscience [Norway] (2008), The Prince of Asturias Award for Technical Scientific Research [Spain] (2008), Foreign Member of The Norwegian Academy of Science and Letters (2009), Order of Culture (2009), Member of The Japan Academy (2010)

Current Research:

HRTEM studies on nano-carbon materials and other nano-materials.
Synthesis of nano-carbon materials such as CNTs, CNHs and graphene.

Abstract

NANO-CARBON MATERIALS: THEIR SCIENCE AND INDUSTRIAL APPLICATIONS

The state of the art of synthesis of various nano-carbon materials that we have studied so far will be reviewed with the emphasis on the large-scale production because it has been one of obstacles for industrial applications of the materials [1, 2]. Separation of semiconducting single wall carbon nanotubes (SWCNT) and metallic ones from pristine SWCNTs has been developed in several different approaches for electronic device applications. A modification of SWCNTs by doping with various substances is an interesting research area of the unique SWCNTs [3]. Carbon nanohorns (CNHs) produced by CO2 laser ablation is another form of graphene-based sheathe structure which is suitable for various adsorption based applications such as potable super-capacitor, fluorine gas absorbent, composite material, medical application etc.[4]. Formation of a large size graphene sheet by thermal CVD method using a copper substrate foil has been reported [5]. The method requires a high temperature CVD reactor (near 1000°C), so that it cannot be utilized in a conventional Si device process and therefore an alternative low temperature synthesis of graphene is needed. For this purpose we utilized a new surface-wave micro-wave CVD method which has been developed originally for the nano-diamond film growth at low temperature down to room temperature [6]. We shall demonstrate the growth of an A4-size graphene sheet grown at 300°C[7].

In the second half part of this presentation will be concerned with structural characterization of nano-carbon materials using atom-resolution electron microscopes as well as other characterization methods of Raman, photoluminescence and optical absorption spectroscopy, etc. The advantage of high resolution electron microscopy (HRTEM) over other techniques is to be able to characterize local atomic structures such as lattice defects and edge structures of nano materials which cannot be studied in conventional techniques [8-14]. Another emphasis of HRTEM will be on dynamic observation of a reaction process which is not available for other high resolution probe microscope techniques such as STM [15,16]. A recent progress of HRTEM technology such as aberration correction and EELS technology, which has made possible elemental analysis, distinction of valency and more on individual atom basis. Some latest examples of above mentioned observations will be demonstrated [17].

1) K. Hata, et al., Science, 306, 1362 (2004).
2) T. Saito, et al., Nanoscience & Nanotechnology, 8, 6153 (2008).
3) T. Okazaki, et al., Angw Chem., 50, 4853(2011).
4) S. Iijima, Chem. Phys. Lett., 302, 165 (1999).
5) S. Bae, et al., Nature Nanotech., (2010).
6) K. Tsugawa et al., PRB, 182, 12460 (2010).
7) J. Kim, et al., APL, 198, 91502(2011).
8) K. Suenaga, et al. Nature Nanotech. 2, 358 (2007)
9) Z. Liu, et al., Nature Nanotech., 2, 422 (2007).
10) Y. Sato, et al., Nano Lett, 7, 3704 (2007).
11) C. H. Jin, et al., Nature Nanotech. 3, 17 (2008).
12) C. H. Jin, et al., PRL, 101, 176102(1)-(4) (2008).
13) M. Koshino, et al., Nature Chemistry (2010).
14) Z. Liu, et al., PRL, 102, 015501 (1)-(4) (2009).
15) C. H. Jin, et al., PRL, 102, 195505 (1)-(4) (2009).
16) C. H. Jin, et al., PRL, 102, 205501 (1)-(4) (2009).
17) K. Suenaga et al., Nature, 468, 1088 (2010).





Prof. Sumio Iijima


Meijo University
Faculty of Science an Technology
Tenpaken, Nagoya
Aichi 468-8502, Japan





PLENARY LECTURES


Eduard Arzt

Ivan Schuller

Dan Shechtman


  
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XX INTERNATIONAL MATERIALS RESEARCH CONGRESS 2011
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