Raman Markers from Silver Nanowire Crossbars
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- Raman Markers from Silver Nanowire Crossbars
- Chang, Sehoon; Ko, Hyunhyub; Gunawidjaja, Ray; Tsukruk, Vladimir V.
- Biological detection; Double-step; Microprinting; Nano-structured; Nanojunctions; Nanowire junctions; Plasmon resonances; Polarization planes; Raman markers; Silver nanoparticles; Silver nanowires; Surface-enhanced Raman scattering
- Issue Date
- AMER CHEMICAL SOC
- JOURNAL OF PHYSICAL CHEMISTRY C, v.115, no.11, pp.4387 - 4394
- We fabricated silver nanowire crossbars partially decorated with silver nanoparticles via a double-step transversal capillary transfer microprinting approach and demonstrated their polarization-dependent surface-enhanced Raman scattering (SERS) properties. We demonstrated that SERS intensity of nanowire junctions and nanowire nanoparticle junctions can be turned on/off on demand by the rotation of the polarization plane, which excites specific transversal plasmon resonances and initiates selective excitation/suppression of central and auxiliary nanostructured junctions. We suggest that massive fabrication of such addressable crossbar nanojunctions is important for exploiting these SERS markers for chemical and biological detection assays.
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