标题：Unusual fcc-structured Ag-10 kernels trapped in Ag-70 nanoclusters
作者：Su, Yan-Min; Wang, Zhi; Zhuang, Gui-Lin; Zhao, Quan-Qin; Wang, Xing-Po; Tung, Chen-Ho; Sun, Di
作者机构：[Su, Yan-Min; Wang, Zhi; Zhao, Quan-Qin; Wang, Xing-Po; Tung, Chen-Ho; Sun, Di] Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, 更多
通讯作者：Sun, Di;Sun, D
通讯作者地址：[Sun, D]Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Educ Minist, Jinan 250100, Shandong, Peoples R China.
摘要：Controlled trapping atom-precise ultrasmall silver nanoparticles into silver nanoclusters is challenging; thus only limited progress has been made in this area. We are therefore inspired to isolate two novel silver nanoclusters, Ag-10@Ag-70 (SD/Ag80a and SD/Ag80b; SD = SunDi), where a novel fcc-structured Ag-10 kernel built from two single-edge opened Ag-6 octahedra by sharing one edge is trapped. The bioctahedral Ag-10 kernel is locked by a pair of Mo7O2610- anions to form an inner Ag-10@(Mo7O26)(2) core which is further encapsulated by an outer Ag-70 shell to form three-shell Ag-10@(Mo7O26)(2)@Ag-70 nanoclusters. Notably, the bioctahedral Ag-10 kernel has not been observed in silver nanoclusters ever before, thus representing a new embryo state of silver nanoparticles. SD/Ag80a emits in the near infrared (NIR) region ((em) = 730 nm) at low temperature. This work will deepen our understanding on the atomic-level growth of silver nanoparticles and complicated three-shell self-assembly involving polyoxometalate (POM) and two different silver nanoclusters.