INTRODUCTION OF LABORATORY

The research goal of Mayumi group is to reveal molecular mechanisms for macroscopic properties of soft matter systems. One of our targets is to understand toughening mechanisms of polymeric materials. Recently, the fine control of nano-structure has improved significantly the mechanical toughness of polymer-based materials. The tough polymeric materials are expected to be applied for biomaterials, soft robots, and structural materials for automobiles and airplanes. We study nano-structure and dynamics of the tough polymeric materials by means of small-angle and quasi-elastic neutron scattering measurements with deuterium labelling. The deuterium labelling technique enables us to observe separately each component in multi-component systems. By combining the nano-scale structure/dynamics measurements, macroscopic mechanical tests, and molecular dynamics simulations, we aim to establish molecular understandings of toughening mechanisms for polymeric materials and discover novel molecular designs for tough materials.

x線1分子計測法の原理。対象は生体分子からナノ無機構造体まで可能。

DNA1分子高精度運動観察。チャネルタンパク質の内部運動計測。フィラメント分子の2方向運動計測。1Å精度以下の1分子運動計測。～aNX線放射圧の計測。運動のシミュレーション。1分子抗原抗体反応ダイナミクス。測定されたサンプル系の例。