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Surface-enhanced Raman scattering (SERS) has become one of the most powerful analytical techniques for detection of chemical and biological substances at low concentrations.Bimetallic dendrite,composed of two different metal elements,is desired to be an ideal SERS substrate own to the synergistic effect [1].Herein we synthesize bimetallic Cu/Ag dendrite with different atom ratio of copper and silver with Surface-Enhanced Raman Scattering at graphene sheet using a facile electrodeposition method.