Towards Ultrasensitive Nanoscale Chemical Imaging under Ambient Laboratory Conditions

Trapping light waves as a result of their resonant interaction with free electrons in the conduction band of metals is the concept behind several emerging nanophotonic technologies. The localization of surface plasmons using engineered metal nanostructures and their interaction with molecular polarizability tensors have afforded single molecule detection sensitivity in surface-enhanced Raman scattering (SERS), and more recently, chemical imaging within one molecule through tip-enhanced Raman scattering (TERS).

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