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Keywords:

  • metal nanowires;
  • metal nanoparticles;
  • surface-enhanced Raman scattering;
  • bimetallic materials;
  • silver;
  • gold;
  • core/shell structures;
  • sensors
Thumbnail image of graphical abstract

Hybrid bimetallic nanocobs, comprising a silver nanowire core surrounded by a gold nanoparticle shell linked together by a star polymer with terminal functional groups, revealed a greatly enhanced SERS ability. The SERS enhancement exceeded Raman scattering from isolated silver nanowires by about two orders of magnitude. Effective plasmon excitation provides a broad absorption band for SERS activation, which is also directionally dependent, making the nanocobs promising candidates for arrayed microstructures.