Structural Materials Science Laboratory
Chief Scientist
Masaki TAKATA (D.Sci.)
Synchrotron Radiation(SR) is well known to be a powerful probe of electrons in materials, which should govern various of properties of materials sucha as superconductivity, semiconductivity, metalic property, optical property, etc. Our research goal is to create the novel Structural Materials Science, which allows to uncover the relationship between electron density level structure and intriguing property of advanced materials using SR. In order to tackle the task, we have been developing both the precise SR diffraction experimental technique and progressi ve data analysis technique for charge density mapping as well as electrostatic potential imaging at SPring-8. As for the experimenl technique, the advanced powder diffraction, single crystal diffraction, SAXS measurement method have been developed with the simaltaneous sample control system. The latest measurement system is the combination of the time resolved diffraction experiment using 40ps SR puls and 100nm focused beam, i.e., "X-ray pinpoint structural measurement" developed in 2008. We have applied this system to investigate the fast phase change phenomena used for the optical recording of the DVD media. Our next targets are real time atoms & molecular interaction visualization via electrostatic potential imaging and time resolved X-ray diffraction of photo reaction, gas absorption, etc.
- MEM charge density materials science of advanced materials by synchrotron radiation
- Precise electron density mapping of proteins by MEM
- Structural materials science of nano-bio materials by synchrotron radiation small angle scattering
- Visualization of nano-level material reaction by the time resolved X-ray diffraction
- Electron spin density mapping of magnetic materials by synchrotron radiation magnetic scattering
- January 18, 2010
- Effect of yeast prion protein oligomer formation process on infection efficacy clarified
- December 1, 2009
- Identification of new liquid crystal structure with ant nest-like branching structure
- March 20, 2009
- Elucidating a riddle behind fullerene-based superconductor with critical temperature 38 K: Conversion by pressure of the Mott insulation state to the electron-mobile metalic state
- March 19, 2009
- Establishment of K1.8BR beam line in J-PARC Hadron Experimental Facility: Starting ejection of the secondary beam
- October 22, 2008
- Developing a new liquid crystalline organic semi-conductor, characterized by efficient electronic transportation, on the basis of the molecular design to create amphiphilic molecules such as soap
- October 20, 2008
- The world's first nano-sized magnetic particle, expandable at low temperatures, which will enable the development of ultra-precision nano-machinery driven by magnets without risk of thermal expansion.
- February 28, 2008
- Successful new application of SPring-8 beamline to structural analysis of hitherto undetectable mobile proteins and small water molecules
- May 11, 2007
- Successful new application of SPring-8 beamline to structural analysis of hitherto undetectable mobile proteins and small water molecules
- T. Matsunaga, J. Akola, S. Kohara, T. Honma, K. Kobayashi, E. Ikenaga, R. O. Jones, N. Yamada, M. Takata, and R. Kojima.:
"From Local Structure to Nanosecond Recrystallization Dynamics in AgInSbTe Phase-Change Materials"
Nature Materials 10, 129-134 (2011) - J. Kim, H. Tanaka, K. Kato, M. Takata, and Y. Moritomo.:
"Extended d-Electron State of Fe(CN)6 Unit in Prussian Blue Analogue"
Appl. Phys. Express 4, 025801/1-025801/3 (2011) - M. Yamauchi, R. Abe, T. Tsukuda, K. Kato, and M. Takata.:
"Highly Selective Ammonia Synthesis from Nitrate with Photocatalytically Generated Hydrogen on CuPd/TiO2"
J. Am. Chem. Soc. 133, 1150-1152 (2011) - C. H. Shih, C. F. Sheu, K. Kato, K. Sugimoto, J. Kim, Y. Wang, and M. Takata.:
"The Photo-Induced Commensurate Modulated Structure in Site-Selective Spin Crossover Complex trans-[Fe(abpt)2(NCS)2]"
Dalton Trans. 39, 9794-9800 (2010) - J. Miyazaki, K. Matsudaira, Y. Shimizu, M. Itoh, Y. Nagamine, S. Mori, J. E. Kim, K. Kato, M. Takata, and T. Katsufuji.:
"Formation of a Three-Dimensional Network of V Trimers in A2V13O22 (A = Ba, Sr)"
Phys. Rev. Lett. 104, 207201/1-207201/4 (2010) - N. Yasuda, H. Murayama, Y. Fukuyama, J. Kim, S. Kimura, K. Toriumi, Y. Tanaka, Y. Moritomo, Y. Kuroiwa, K. Kato, H. Tanaka, and M. Takata.:
"X-ray Diffractometry for the Structure Determination of a Submicrometre Single Powder Grain"
J. Synchrotron Rad. 16, 352-357 (2009) - Y. Fukuyama, N. Yasuda, J. E. Kim, H. Murayama, Y. Tanaka, S. Kimura, K. Kato, S. Kohara, Y. Moritomo, T. Matsunaga, R. Kojima, N. Yamada, H. Tanaka, T. Ohshima, and M. Takata.:
"Time-Resolved Investigation of Nanosecond Crystal Growth in Rapid-Phase-Change Materials: Correlation with the Recording Speed of Digital Versatile Disc Media"
Appl. Phys. Express 1, 045001/1-045001/3 (2008) - X. G. Zheng, H. Kubozono, H. Yamada, K. Kato, Y. Ishiwata, and C. N. Xu.:
"Giant Negative Thermal Expansion in Magnetic Nanocrystals"
Nature Nanotechnology 3, 724-726 (2008) - K. Kato, Y. Moritomo, M. Takata, H. Tanaka, and N. Hamada.:
"Visualization of Charge Ordering in a Half-Doped Manganite by an Electrostatic Potential Analysis"
Phys. Rev. B 77, 081101/1-081101/4(R) (2008) - M. Takata.:
"The MEM/Rietveld Method with Nano-Applications - Accurate Charge-Density Studies of Nano-Structured Materials by Synchrotron-Radiation Powder Diffraction"
Acta Cryst. A64, 232-245 (2008)
Principal Investigator
- Masaki TAKATA
- Chief Scientist
Staff Scientist
- Sono SASAKI
- Kenichi KATO
- Senior Research Scientist
- Hiroyuki OHSUMI
- Senior Research Scientist
Postdoctoral Fellow
- Takashi KOSONE
- Postdoctoral Researcher
- Hidetaka KASAI
- Postdoctoral Researcher
Student Trainee
- Younghun KIM
- International Program Associate