Fig. 2
From: Room-temperature superionic-phase nanocrystals synthesized with a twinned lattice

Internal domain structure. Representative examples of Cu1.93S NCs with multiple domains apparent in HRTEM imaging: NCs exhibiting a–c two domains and d three domains. In a–d the NC boundary is marked by a dotted red circle and domain boundaries are marked by dotted red lines. Domains are labeled as 1, 2, and 3. All scale bars are 5 nm in length. e Table of statistics of NCs exhibiting single- or multi-domain structures for three levels of sub-stoichiometry. The statistics were determined by analysis of NCs imaged by HRTEM