关键字:SILVER NANOCLUSTERS;GOLD NANOPARTICLE;SHAPE CONTROL;CLUSTERS;TRANSFORMATION;ENHANCEMENTPD
摘要:Atomically precise engineering on the nanocluster surface remains highly desirable for the fundamental
understanding of how surface structures of a nanocluster contribute to its overall properties. In this
paper, the concept of “graft-onto” has been exploited to facilitate nanocluster growth on surface
structures. Specifically, the Ag2(DPPM)Cl2 complex is used for re-constructing the surface structure of
Pt1Ag28(SR)18(PPh3)4 (Pt1Ag28, SR ¼ 1-adamantanethiolate) and producing a size-growth nanocluster –
Pt1Ag31(SR)16(DPPM)3Cl3 (Pt1Ag31). The grafting effect of Ag2(DPPM)Cl2 induces both direct changes on
the surface structure (e.g., size growth, structural transformation, and surface rotation) and indirect
changes on the kernel structure (from a fcc configuration to an icosahedral configuration). Remarkable
differences have been observed by comparing optical properties between Pt1Ag28 and Pt1Ag31.
Significantly, Pt1Ag31 exhibits high photo-luminescent intensity with a quantum yield of 29.3%, which is
six times that of the Pt1Ag28. Overall, this work presents a new approach (i.e., graft-onto) for the precise
dictation of nanocluster surface structures at the atomic level.
卷号:11
期号:6
是否译文:否