通过形状工程稳定超晶格的过渡相

control of silver nanocrystals Yasutaka Nagaoka1, Timothy C. Moore2, Arseniy Epishin3, Zhenyang Liu1, Tong Cai1, Na Jin1, Ken Seungmin Hong1, Peter Saghy1, Ankai Wang4, Yuzi Liu5, Sooyeon Hwang6, Yusong Bai1, Shengli Zou4, Ruipeng Li7, Stephanie Reich3, Sharon C. Glotzer2,8*, Ou Chen1* In nanoscale assemblies, observations of structures in the transition pathways between high-symmetry lattices are rare because of the inherent instability of the intermediate phases. We report that silver nanocrystals with shapes similar to truncated octahedra (mecons) self-assemble into superlattices that are stable and resemble a previously unobserved phase that bridges face-centered and body-centered cubic structures along the Nishiyama-Wassermann martensitic pathway. These superlattices exhibited high structural purity and stability and created a robust and tunable dissymmetric phase landscape. …