Ito & Yokoyama Laboratory | The University of Tokyo

Career Summary

1989:

B.Eng. in Polymer Chemistry, Tokyo Institute of Technology

1991:

M.Eng. in Polymer Chemistry, Tokyo Institute of Technology

1991:

Researcher, Bridgestone Corporation

1999:

Ph.D. in Materials Sci. & Eng., Cornell University

2001:

Senior Researcher, National Institute of Advanced Industrial Science and Technology

2008:

Associate Professor, Dept. of Advanced Materials Science, University of Tokyo

Educational Activities

Graduate school:

Research Activities

We have been investigating the self-assembly of block copolymers and their applications. Block copolymer morphologies are sized larger than simple molecules but smaller than that achieved by typical top-down technologies.

• Diffusion of block copolymers[1]
• Block copolymer thin films[2,3,4]
• Surface segregation of block copolymers[5,6]
• Block copolymer template[7,8,9]

[文献]

1. "Diffusion of block copolymers" Hideaki Yokoyama, Materials Science and Engineering R 53, 199?248 (2006).
2. "Graphoepitaxy of Spherical Domain Block Copolymer Films" R. A. Segalman, H. Yokoyama and E. J. Kramer, Adv. Mater., 13, 1152-1155 (2001).
3. "Structure of Asymmetric Diblock Copolymers in Thin Films" H. Yokoyama, T. E. Mates, and E. J. Kramer, Macromolecules, 33, 1888 (2000).
4. "Aligning Single-Layer Cylinders of Block Copolymer Nanodomains using Soft Molding" L. Li, H. Yokoyama, Adv. Mater., 17, 1432-1436 (2005).
5. "Surface Segregation of Block Copolymers with a Water-Soluble Block" H. Yokoyama, T. Miyamae, S. Han, T. Ishizone, K. Tanaka, A. Takahara, and N. Torikai, Macromolecules, 38, 5180-5189 (2005).
6. "Spontaneously formed blood compatible surfaces on hydrophobic polymers: surface enrichment of a block copolymer with a water-soluble block" A. Oyane, T. Ishizone, M. Uchida, K. Furukawa,T. Ushida and H. Yokoyama*, Adv. Mater. 17, 2329 (2005).
7. "Facile Fabrication of Nanocellular Block Copolymer Thin Films using Supercritical Carbon Dioxide" L. Li, H. Yokoyama, K. Sugiyama, T. Nemoto, Adv. Mater., 16, 1226-1229 (2004).
8. "Tunable Nanocellular Polymeric Monoliths using Fluorinated Block Copolymer Templates and Supercritical Carbon dioxide" H. Yokoyama, L. Li, K. Sugiyama, T. Nemoto, Adv. Mater., 16, 1542-1546 (2004).
9. "Nanoscale Silica Capsules Ordered on a Substrate: Oxidation of Nanocellular Thin Films of Poly(styrene-b-dimethylsiloxane)" L. Li, H. Yokoyama, Angew. Chem. Int. Ed. 45, 6338-6341 (2006).

Literature

Other Activities

Society of Polymer Science, Japan(SPSJ)
American Physical Society(APS)

Future Plan

We will study structrures and properties of self-assembled materials and find methods for industrial applications.

Messages to Students

Soft matters are everywhere around you, including yourself. You are welcome to join us to enjoy this interdisciplinary field of Physics, Chemistry, Biology, and Materials.