Training and retraining liquid crystal elastomer metamaterials for pluripotent functionality
成果类型：
Article
署名作者：
Gowen, Savannah D.; Ghimire, Elina; Lindberg, Charlie A.; Appen, Ingrid S.; Rowan, Stuart J.; Nagel, Sidney R.
署名单位：
University of Chicago; University of Chicago; University of Chicago; University of Chicago
刊物名称：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN/ISSBN：
0027-12192
DOI：
10.1073/pnas.2504304122
发表日期：
2025-07-22
关键词：
摘要：
Training has emerged as a promising materials design technique in which function can be achieved through repeated physical modification of an existing material rather than by direct chemical functionalization, cutting, or reprocessing. This work investigates both the ability to train for function and then to erase that function on-demand in macroscopic metamaterials made from liquid crystal elastomers. We first show that the Poisson's ratio of these disordered arrays can be tuned via directed aging to induce an auxetic response. We then show that the arrays can be reset and retrained for another local mechanical function, allostery, thus demonstrating pluripotent functionality.