Issue 21, 2024

Temperature-sensitive metal-enhanced fluorescence and plasmon resonance energy transfer

Abstract

Experimental decoupling of the effects of plasmon resonance energy transfer (PRET) and metal-enhanced fluorescence (MEF) within the same nanometal–fluorophore pair is fascinating but challenging. In this study, we presented a possible solution for this by coating plasmonic Au nanoparticles (AuNPs) with temperature-sensitive poly(N-isopropylacrylamide) (pNIPAM) shells and R6G hybrids, termed the Au@p-R nanoplatform, which could reversibly adjust the separation between dyes and the AuNP surface, enabling an ON/OFF switch between MEF and PRET. In our optimization process, we discovered that 20 kDa of pNIPAM causes an MEF effect owing to an appropriate shrinking distance of 6.86 ± 0.85 nm. This dual-model nanoplatform exhibits great potential for tracking temperature-dependent transitions.

Graphical abstract: Temperature-sensitive metal-enhanced fluorescence and plasmon resonance energy transfer

Article information

Article type
Paper
Submitted
22 Febr. 2024
Accepted
27 Apr. 2024
First published
29 Apr. 2024

Anal. Methods, 2024,16, 3331-3336

Temperature-sensitive metal-enhanced fluorescence and plasmon resonance energy transfer

Y. Zhang, L. Wang, L. Ge, Y. Wei, S. He and H. Liu, Anal. Methods, 2024, 16, 3331 DOI: 10.1039/D4AY00315B

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