| 摘要 |
An apparatus comprising a mechanically stable substrate selected from the group consisting of a semiconductor, metal, and dielectric and at least two nanowires on the substrate, the nanowires comprising a core and a metal shell, wherein the core is selected from the group consisting of a semiconductor and a dielectric, thereby forming a nanowire-composite to allow plasmon coupling for enhancements of the electric fields and enhancements of the surface enhanced Raman signal (SERS) and enhancements of the chemical or biological specificity and sensitivity. A method of making a SERS-active substrate comprising providing a mechanically substrate selected from the group consisting of a semiconductor, metal, and dielectric and affixing a plurality of nanowires on the substrate wherein the nanowires are comprised of one selected from the group consisting of Ga<SUB>2</SUB>O<SUB>3</SUB>, ZnO, SiO<SUB>2</SUB>, InAs, InSb, SiC and GaN having a diameter of between about 30 nm to about 150 nm, and a metal shell, thereby forming a nano-composite, creating plasmon coupling leading to enhanced electric fields in the vicinity of the nanowires and enhancements of the surface enhanced Raman signal (SERS) and enhancements of the chemical or biological specificity and sensitivity.
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