Takeshi Fujita

Phone: +81-22-217-5959 Fax: +81-22-217-5955
Email: tfujita＠wpi-aimr.tohoku.ac.jp

Education

· Ph.D. in Material Science and Engineering, Kyushu University, Kyushu, Japan, 2003

Professional Experience

09/2005 – present

Assistant Professor, Institute for Materials Research, Tohoku University, Sendai, Japan

08/2003 – 08/2005

JSPS Distinguished Overseas Researcher, Arizona State University, Tempa, AZ, USA

04/2003 – 08/2003

Assistant Professor, Kyushu University, Kyushu, Japan

Research Interests

· Characterization of Materials by Transmission Electron Microscopy

· Synthesis of Nanocrystalline Materials

· Holography Analysis

· Synthesis of Ferromagnetic-material-embedded Nanotubes

· Quantitative Chemical Analysis by X-ray Techniques

· Synthesis of Nanowires

Selected Publications

1. L. Y. Chen, J. S. Yu, T. Fujita, and M. W. Chen, Nanoporous copper with tunable nanoporosity for SERS applications, Advanced Functional Materials (2009), in press.

2. L. Zhang, T. Fujita, F. Chen, D.L. Feng, S. Maekawa, and M.W. Chen, Doping and temperature dependence of Raman scattering from NdFeAsO1-xFx(x=0-0.2) superconductor, Physical Review B (2009), in press.

3. T. Fujita, H. Okada, K. Koyama, K. Watanabe, S. Maekawa, and M. W. Chen, Unusually small electrical resistance of three-dimensional nanoporous gold in external magnetic fields, Physical Review Letters 101,166601 (2008).

4. L. H. Qian, Y. Ding, T. Fujita, and M. W. Chen, Synthesis and optical properties of three-dimensional porous core-shell nanoarchitectures, Langmuir 24, 4426-9 (2008).

5. K. Wang, T. Fujita, D. Pan, T. G. Nieh, A. Inoue, and M.W. Chen, Interfacial structure and property of a brass reinforced Ni59Zr20Ti16Si2Sn3 bulk metallic glass composite, Acta Materialia 56, 3077-87(2008).

6. K. Wang, T. Fujita, Y.Q. Zeng, N. Nishiyama, A. Inoue, and M.W. Chen, Micromechanisms of serrated flow in a Ni50Pd30P20 bulk metallic glass with a large compression plasticity, Acta Materialia 56, 2834–42 (2008).

7. T. Fujita, M. W. Chen, Characteristic length scale of bicontinuous nanoporous structure by fast Fourier transform, Japanese Journal of Applied Physics 47 (2008) 1161-1163.

8. K. Wang, M. W. Chen, D. Pan, T. Fujita, W. Zhang, X.M. Wang and A. Inoue, Plastic deformation energy of bulk metallic glasses, Materials Science and Engineering B 148 (2008) 101-104.

9. S. O. Hruszkewycz, T. Fujita, M. W. Chen, T. C. Hufnagel, Selected area nanodiffraction fluctuation electron microscopy for studying structural order in amorphous solids, Scripta Materialia 58 (2008), 303-306.

10. K. Wang, T. Fujita, M. W. Chen, T. G. Nieh, H. Okada, K. Koyama, W. Zhang, and A. Inoue, Electrical conductivity of a bulk metallic glass composite, Applied Physics Letters 91:154101 (2007).

11. D. Pan, S. Kuwano, T. Fujita, A. Inoue and M. W. Chen, Ultra-large Room-temperature Compressive Plasticity of a Nanocrystalline Metal, Nano Letters 7:2108-2111 (2007).

12. Y. Hayashi, T. Fujita, T. Tokunaga, K. Kaneko, T. Butler, N. Rupesinghe, J.D. Carey, S. R. P. Silva, G. A. J. Amaratunga, Encapsulation of Co and Pd multi-metal nanowires inside multiwalled carbon nanotubes by microwave plasma chemical vapor deposition, Diamond and Related Materials 16:1200-1203 (2007).

13. L. H. Qian, X. Q. Yan, T. Fujita, A. Inoue, M. W. Chen, Surface enhanced Raman scattering of nanoporous gold: Smaller pore sizes stronger enhancements, Applied Physics Letters 90:153120 (2007).

14. T. Fujita, Y. Hayashi, T. Tokunaga, T. Butler, N. L. Rupesinghe, K. B. K. Teo, G. A. J. Amaratunga, Encapsulation of segmented Pd-Co nanocomposites into vertically aligned carbon nanotubes by plasma-hydrogen-induced demixing, Applied Physics Letters 90:133116 (2007).

15. R. A. Espinoza, R. H. Palma, A.O. Sep?lveda, V. Fuenzalida, G. Sol?rzano, A. Craievich, D. J. Smith, T. Fujita and M. L?pez, Microstructural characterization of dispersion-strengthened Cu?Ti?Al alloys obtained by reaction milling. (2007) Material Science and Engineering A 454-455:183-193.

16. T. Fujita, M.W. Chen, X.M. Wang, B.S. Xu, K. Inoke and K. Yamamoto. Electron holography of single-crystal iron nanorods encapsulated in carbon nanotubes. (2007) Journal of Applied Physics 101:014323.

17. K. Ohashi, T. Fujita, K. Kaneko, Z. Horita and T.G. Langdon. The aging characteristics of an Al-Ag Alloy processed by equal-channel angular pressing. (2006) Material Science and Engineering A 437:240-247.

18. T. Tokunaga, Y. Hayashi, T. Fujita, S. R. P. Silva and G. A. J. Amaratunga. (2006) Demixing of Solid-Soluted Co-Pd Binary Alloy Induced by Microwave Plasma Hydrogen Irradiation Technique. Japanese Journal of Applied Physics part 2 45:L860-L863.

19. T. Fujita, Y. Hayashi, T. Tokunaga, K. Yamamoto. (2006) Cobalt nanorods fully encapsulated in carbon nanotube and magnetization measurements by off-axis electron holography. Applied Physics Letter 88:243118.

20. T. Fujita, K. Yamamoto, M.R. McCartney, D.J. Smith. (2006) Reconstruction technique for off-axis electron holography using coarse fringes. Ultramicroscopy 106:486-491.

21. T. Fujita, S. Nishimura, T. Fujinami, K. Kaneko, Z. Horita and D.J. Smith. (2006) Application of equal-channel angular pressing to Cu-Co alloy?with ferromagnetic precipitates. Material Science and Engineering A 417:149-157.

22. S.V. Dobatkin, E.N. Bastarache, G. Sakai, T. Fujita, Z. Horita, T.G. Langdon. (2005) Grain refinement and superplastic flow in an aluminum alloy processed by high-pressure torsion. Material Science and Engineering A. 408:141-146.

23. Z. Horita, K. Ohashi, T. Fujita, K. Kaneko and T.G. Langdon. (2005) Achieving High Strength and High Ductility in Precipitation-Hardened Alloys. Advanced Materials 17:1599-1602.

24. T. Fujita and M.R. McCartney. (2005). Phase recovery for electron holography using Gerchberg-Papoulis iterative algorithm. Ultramicroscopy 102:279-286.

25. K. Fujita, T. Fujita, K. Oh-ishi, K. Kaneko, Z. Horita and T.G. Langdon. (2005). Microstructures after Processing by Aging and ECAP for Al-Mg2Si Alloys Containing Excess Si or Mg. Materials Science Forum 475-479:4047-4050.

26. Y. Yahiro, K. Kaneko, T. Fujita, W.-J. Moon and Z. Horita. (2004).　Crystallographic Orientation Contrast Associated with Ga+ Ion Channeling for Fe and Cu in Focused Ion Beam method. Journal of Electron Microscopy 53:571-576.

27. K. Ohshima, K. Kaneko, T. Fujita and Z. Horita. (2004). Determination of absolute thickness and mean free path of thin foil specimen by z-factor method. Journal of Electron Microscopy 53:137-142.

28. T. Fujita, Z. Horita and T.G. Langdon. (2004). Using grain boundary engineering to evaluate the diffusion characteristics in ultrafine-grained Al?Mg and Al?Zn alloys. Materials Science and Engineering A 371:241-250.

29. T. Fujita, K. Kaneko, Z. Horita. (2003). Diffusion Analysis across Grain Boundary in Al-3.7 mass%Cu Alloy Using Analytical Electron Microscopy. Materials Transactions 44:1336-1342.

30. K. Ohashi, T. Fujita, K. Oh-ishi, K. Kaneko, Z. Horita and T.G. Langdon. (2003). Microstructural control of a precipitate-hardenable Al-Ag alloy using severe plastic deformation. Materials Science Forum 426-432:2637-2642.

31. T. Fujita, Z. Horita and T.G. Langdon. (2002). Diffusion in fine-grained Al alloys having low and high angle boundaries. Materials Science Forum 396-402:1061-1066.

32. T. Fujita, Z. Horita and T.G. Langdon. (2002). Characteristics of diffusion in Al-Mg alloys with ultrafine grain sizes. Philosophical Magazine A 82:2249-2262.

33. T. Fujita, Z. Horita and T.G. Langdon. (2001). Diffusion in Ultraine-Grained Al-Mg Alloys. Defect and Diffusion Forum 194-199:1205-1210.

34. T. Fujita, H. Ikeda, S. Tanaka, and Z. Horita. (2001). Construction of Ti-Al-Cr Phase Diagram Using Quantitative X-ray Microanalysis in Analytical Electron Microscope. Journal of Japan Institute of Metals 65:382-388.

35. T. Fujita, S. Komura, Z. Horita and T.G. Langdon. (2000). Superplasticity of ultrafine-grained Al-3%Mg-0.2%Sc alloy produced by equal-channel angular pressing. Journal of Japan Institute of Light Metals 50: 376-380.