Takayoshi Sasaki
- Affiliation:
- Softchemistry Group, MANA, NIMS
- Graduate School of Pure and Applied Sciences, University of Tsukuba
- Specialty:
- Nanosheet and Softchemistry
- Academic degree:
- Ph.D. (Science) The University of Tokyo (1986)
- Recent publications
- See NIMS Researchers DB
- Redoxable nanosheet crystallites of MnO2 derived via delamination of a layered manganate
- Omomo Y, Sasaki T, Wang LZ, Watanabe M
- J Am Chem Soc, 2003; 125(12): 3568.
- Superconductivity in two-dimensional CoO2 layers
- Takada K, Sakurai H, Takayama-Muromachi E, Izumi F, Dilanian RA, Sasaki T
- Nature, 2003; 422: 53-55.
- Electronic band structure for titania semiconductor nanosheets revealed by electrochemical and photoelectrochemical studies
- Sakai N, Ebina Y, Takada K, Sasaki T
- J Am Chem Soc, 2004; 126(18): 5851.
- Synthesis, anion exchange, and delamination of Co-Al layered double hydroxide. Assembly of the exfoliated nanosheet/polyanion composite films and magneto-optical studies
- Liu Z, Ma R, Osada M, Iyi N, Ebina Y, Takada K, Sasaki T
- J Am Chem Soc, 2006; 128(14); 4872.
- Gigantic magneto-optical effects in multilayer-assemblies of two-dimensional titania nanosheets
- Osada M, Ebina Y, Takada K, Sasaki T
- Adv Mater, 2006; 18(3): 295-299.
- High-κ dielectric nano-films fabricated with titania nanosheets
- Osada M, Ebina Y, Funakubo H, Yokoyama S, Kiguchi T, Takada K, Sasaki T
- Adv Mater, 2006; 18(8): 1023-1027.
- Topochemical synthesis of monometallic (Co2+-Co3+) layered double hydroxide and its exfoliation into positively charged Co(OH)2 nanosheets
- Ma R, Takada K, Fukuda K, Iyi N, Bando Y, Sasaki T
- Angew Chem Int Ed, 2008; 47(1): 86-89.
- Exfoliated nanosheet crystallite of cesium tungstate with 2D pyrochlore structure: Synthesis, characterization and photochromic properties
- Fukuda K, Akatsuka K, Ebina Y, Ma R, Takada K, Nakai I, Sasaki T
- ACS Nano, 2008; 2(8): 1689-1695.
- One-nanometer-thick seed layer of unilamellar nanosheets promotes oriented growth of oxide crystal films
- Shibata T, Fukuda K, Ebina Y, Kogure H, Sasaki T
- Adv Mater, 2008; 20(2): 231-235.
- General synthesis and structural evolution of a layered family Ln8(OH)20Cl4·nH2O (Ln = Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Y)
- Geng F, Matsushita Y, Ma R, Xin H, Tanaka M, Izumi F, Iyi N, Sasaki T
- J Am Chem Soc, 2008; 130(48): 16344-16350.
- Construction of highly ordered lamellar nanostructures through Langmuir-Blodgett deposition of molecularly thin titania nanosheets tens of micrometers wide and their excellent dielectric properties
- Akatsuka K, Haga M, Ebina Y, Osada M, Fukuda K, Sasaki T
- ACS Nano, 2009; 3(5): 1097-1106.
Educational and Working History
2009 | NIMS Fellow | ||
2006 | Managing director, Nanoscale Materials Center | ||
2003 | Director, Soft chemistry group, NIMS | ||
2001 | Senior researcher, National Institute for Materials Science (NIMS; reorganized from NIRIM) | ||
1988 | Senior researcher, NIRIM | ||
1986 | - | 1987 | Visiting scholar, University of California, Berkeley |
1980 | Researcher, National Institute for Research in Inorganic Materials (NIRIM) | ||
1986 | Doctor of Science, The University of Tokyo |
Research History
Takayoshi Sasaki has been working on the synthesis and characterizations of a variety of layered host compounds. His particular interest has been directed to soft-chemical synthesis utilizing their chemical reactions, e. g., intercalation. He is one of pioneers for investigation on delamination since he found that a layered titanate undergoes total exfoliation into colloidal single layers for the first time. Since then, he succeeded in synthesizing a number of functional oxide and hydroxide nanosheets such as MnO2, Cs4W11O36, and Co(OH)2. He has demonstrated that these nanosheets show novel physicochemical properties associated with the extremely high 2D anisotropy having a molecular thickness. One of the highlights in the course of such study is the discovery of superconductivity in 2D CoO2 sheets, which is a very hot topic in recent years.
Furthermore, he has demonstrated that nanosheets can be organized or assembled into various nanostructured materials such as nanofilms, nanotubes, nanoshells, and lamellar aggregates. Useful functionalities such as photocatalysis, dielectric and ferromagnetic properties have been achieved through this synthetic strategy by combining nanosheets with a range of materials (polyions, clusters, metal complexes) and controlling their nanoarchitectures. Some of the developments, for example, fabrication procedures TiO2 flaky particulates, have been transferred to industry. These achievements have been highly recognized in the community of materials science.