... increasing outward force on the wire, favoring an intro-duction of the w idening facet. This oscillatory mechan-ism leads to the periodic faceting seen here.Concluding Remarks In this investigation, ... USA.2Department of Physics, University of Illinois,Chicago, IL 60607, USA.3Department of Bioengineering, University of Illinois,Chicago, IL 60607, USA.4Research Resources Center, University of Illinois,Chicago, ... tapering observed in the nanowires can be explained by the change in theshape of the catalyst causing a variation of the contact area at the liquid–solid interface of the nanowires. The rateof...