Rebecca L. Agapov, Alexei P. Sokolov and Mark D. Foster Protecting TERS probes from degradation: extending mechanical and chemical stability Journal of Raman Spectroscopy 44
We have shown that adding a protective alumina layer to a silver plasmonic structure greatly reduces chemical degradation at the plasmonic surface. We ascribe the observed significant increase in storage and scanning use lifetimes of the protected plasmonic structures to the chemical protection provided by the thin alumina layers. Storage life of silver structures is extended to three months and scanning lifetimes are increased by a factor of two.
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