Small molecular nanowire arrays assisted by superhydrophobic pillar-structured surfaces with high adhesion.

Elaborately programmed fluorescent calcein nanowire arrays can be prepared with the aid of superhydrophobic pillar-structured surfaces with high adhesion. Each nanowire can be precisely positioned by well designed tip-structured micropillars, indicating an advance in the methodologies of controlling small molecular 1D organic nanostructures. The as-prepared fluorescent nanowire arrays can serve as a ferrous salt sensing device.