The Japan Atomic Energy Agency, the Comprehensive Research Organization for Science and Society (CROSS), the J-PARC Center, Yamagata University, Mie University, Kyoto University, and Yokohama Rubber have elucidated the molecular-level bonding state of rubber and silica using spin contrast modulated neutron reflectometry that utilizes neutrons and hydrogen spins. The spin-contrast modulated neutron reflectometry is a method for structural analysis of…