Composition-adjustable Ag-Au substitutional alloy microcages enabling tunable plasmon resonance for ultrasensitive SERS.

ABSTRACT: Engineering the surface plasmon resonance (SPR) properties is a critical issue for improving device performance in the fields of plasmonics, nanophotonics, optoelectronics, and electrochemistry. Here, we demonstrated a programmable manipulation of the surface plasmon resonance (SPR) effect using composition-adjustable Ag-Au substitutional alloy microcages (SAMCs) through a facile NaBH₄-cooperative galvanic replacement reaction. The SPR frequency of the Ag-Au SAMCs can be continuously and exquisitely manipulated without resonance damping or broadening via accurate adjustment of the elemental composition distribution at the perfect homogeneity on the atomic-level. Significantly, both the tunable SPR frequency and excellent chemical stability synergistically endow the hollow

SUBMITTER: Wang X 

PROVIDER: S-EPMC5944819 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature