Extended Data Fig. 1: Selective etching of BiGa surface solidification patterns.
From: Unique surface patterns emerging during solidification of liquid metal alloys
a, Schematic of EBiGa selective etching using NaOH aqueous solution (1 mol L-1). b,c, AFM topography of a lamellar surface pattern before b and after etching (c, 30 min). d,e, Height profiles of the lamellar surface patterns along the dashed lines in b and c, respectively. The positions of the Bi and Ga structures are indicated. f-h, Free-standing Bi nanoribbons and nanoplates obtained after etching for 5 hrs. i, j, Examples of fully exposed Bi surface patterns showing the Bi structure thickness. Scale bars: b,c, 500 nm; f, 5 μm; g,h, 1 μm; i,j, 2 μm (left) and 500 nm (right).
