Affiliation:
1. Department of Materials Process Engineering Graduate School of Engineering Nagoya University Furo‐cho Chikusa‐ku Nagoya 464‐8603 Japan
2. School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN) University of Queensland Brisbane Queensland 4072 Australia
3. Department of Plant & Environmental New Resources Kyung Hee University 1732, Deogyeong‐daero, Giheung‐gu Yongin‐si Gyeonggi‐do 17104 Republic of Korea
Abstract
AbstractFlexible porous materials have gained considerable interest for their potential applications in selective absorption and controlled release/storage of specific molecules or compounds. Here, nanoscrolls are proposed as a type of inorganic solids with reversibly flexible mesopores. Nanoscrolls exhibit a rolled‐up structure composed of nanosheets with a 1D rod‐like morphology, possessing two distinct nanospaces. The first space comprises 1D tubular mesopores located at the center of the rod, while the second space exists in the interlayer regions on the wall of the mesopore, resulting from the layer stacking caused by the scrolling of nanosheets. By replacing the interlayer cations on the nanoscroll walls with other cations, a drastic alteration in the size of the 1D mesopores is observed. For instance, exchanging bulky dodecylammonium cations with small NH4+ cations leads to a substantial change in pore size, with differences ranging from 10 to 20 nm—a notably larger variation compared to previous reports on flexible porous materials. Importantly, the alteration of pore size induced by the exchange reaction is found to be reversible. This reversible alteration in pore size holds promise for applications in host–guest chemistry involving large moieties such as nanoparticles and enzymes.
Funder
Iketani Science and Technology Foundation
Exploratory Research for Advanced Technology