| 초록 |
As a novel optical nanoprobe, surface-enhanced Raman scattering (SERS) tags have drawn growing interests in chemical and biological sensing, environmental monitoring, and bioimaging fields. Ideally, a SERS tag should provide uniform and stable SERS signals via SERS-active hot spots in SERS tag nanostructures. Furthermore, Raman reporters on metal nanostructures should be adsorbed firmly and remained stable over time, which are still challenging. Herein, we present a single-step synthesis strategy for Ag nano-gap bumpy shell (Ag NBS) SERS tag. The SERS tags showed 2-nm sized gap, which can generate a strong EM filed enhancement, eventually leading to highly enhanced Raman signals. The SERS signals exhibited long-term stability. The mechanism for the formation of Ag NBS was also systematically studied. |
