Triple-channel SPR ion-imprinted fiber sensor enabled by MoS2 thickness-tuned resonance for multiplexed heavy metal ion detection.

The distinction of multiple heavy metal ions (Cu2+, Ni2+, Pb2+) in water using surface plasmon resonance (SPR) is inherently challenging due to their nearly identical impact on the bulk refractive index. We demonstrate a novel triple-channel SPR fibe…

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