Plasmonic coupling of silver nanospheres loaded on cobalt–iron layered double hydroxides: a robust SERS probe for 4-nitrophenol detection

Abstract

The development of surface enhanced Raman spectroscopy (SERS) substrates capable of sensing organic pollutants at low concentrations with high sensitivity has always been demanding.

SERS hotspot engineering using external field assembly of a plasmonic magnetic nanocomposite with high sensitivity and uniformity

“…The ability to reuse magnetic nanoparticles (MNPs) not only promotes economic efficiency but also aligns with ecological sustainability by reducing both costs and the environmental impact. 4–16 Despite its potential, the practical application of magnetic SERS in real-world scenarios is hampered by a trio of formidable challenges: the inconsistent reproducibility across different batches, concerns over substrate stability, and the inherent nonuniformity of hotspot distribution. 17…”