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The resonance energy transfer (RET) from excited fluorescent probe molecules to plasmonic gold nanoparticles (AuNPs) can be gated by modulating the width of channels (gates) in submonolayer protein shells surrounding AuNPs. We have explored the gated-RET (gRET) processes using an antiapoptotic protein survivin (Sur) as the gating material, citrate-capped gold nanoparticles (AuNP@Cit), and fluorescein isothiocyanate as the fluorescent probe. Despite the electrostatic repulsive forces between these components, a strong modulation of RET
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