NANOWIRE HETEROSTRUCTURES, METHODS OF FORMING THE SAME AND THEIR ENHANCED RAMAN ACTIVITY

摘要

A NERS-active structure (100, 101, 102, 103) is disclosed that includes at least one heterostructure nanowire (120, 121, 220). The at least one heterostructure nanowire (120, 121, 220) may include alternating segments (140, 150) of an NERS-inactive material and a NERS-active material in an axial direction. Alternatively, the alternating segments (150, 151 ) may be of an NERS-inactive material and a material capable of attracting nanoparticles of a NERS-active material. In yet another alternative, the heterostructure nanowire (220) may include a core (240) with alternating coatings (250, 260) of an NERS- inactive material and a NERS-active material in a radial direction. A NERS system is also disclosed that includes a NERS-active structure (100, 101, 102, 103). Also disclosed are methods for forming a NERS-active structure (100, 101, 102, 103) and methods for performing NERS with NERS-active structures (100, 101, 102, 103).