Unique Heterogeneous Silver–Copper Dendrites with a Trace Amount of Uniformly Distributed Elemental Cu and Their Enhanced SERS Properties

Ag–Cu dendrites are grown from Cu foil/plate by a galvanic displacement reaction between AgNO 3 aqueous solution and the Cu substrate at room temperature. The dendrites show increased surface‐enhanced Raman spectroscopy (SERS) enhancement capability for the detection of organic dye molecules.