... 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, ... Engineering Department, University of Illinois,Chicago, IL 60607, USA.2Department of Physics, University of Illinois,Chicago, IL 60607, USA.3Department of Bioengineering, University of ... 6:3http://www.nanoscalereslett.com/content/6/1/3Page 2 of 9seen here in the case of the tapered ZnO wire in Figure 5d, and such oscillations of the droplet resulting in faceting in the nanowire sidewalls is discussed below in detail....