Creating hot nanoparticle pairs for surface-enhanced Raman spectroscopy through optical manipulation.
نویسندگان
چکیده
We use optical tweezers to move single silver nanoparticles into near-field contact with immobilized particles, forming isolated surface-enhanced Raman spectroscopy (SERS) active Ag particle dimers. The surface-averaged SERS intensity increases by a factor approximately 20 upon dimerization. Electrodynamics calculations indicate that the final approach between the particles is due to "optical binding". The described methodology may facilitate controlled single molecule SERS analysis.
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ورودعنوان ژورنال:
- Nano letters
دوره 6 12 شماره
صفحات -
تاریخ انتشار 2006