Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

Ju, Seongmin; Han, Won‐Taek

doi:10.3390/s19071666

Cited by 3 publications

(1 citation statement)

References 88 publications

(138 reference statements)

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“…A surface plasmon is a collective oscillation of free electrons excited by photons on the metal, which generates a huge enhanced electromagnetic field on the metal surface. This strongly enhanced electromagnetic field can be applied to the field of nano-optics, such as surface enhanced spectroscopy, − ultrasensors, , water splitting, , light traps, ultra-diffraction-limited optical waveguides, and so forth. In recent years, an interesting surface-enhanced Raman scattering (SERS)-related phenomenon called plasmon-driven surface catalysis (PDSC) has been reported by many groups, in which p -aminothiophenol (PATP) or 4-nitrobenzenethiol (4-NBT) could be converted into p , p ′-dimercaptoazobenzene (DMAB) molecules with the help of surface plasmons near the metal surface. − In this phenomenon, the Raman peaks at 1143, 1390, and 1432 cm –1 are derived from newly generated DMAB molecules instead of the original PATP or 4-NBT molecules.…”

Section: Introductionmentioning

confidence: 99%

Plasmon-Driven Interfacial Catalytic Reactions in Plasmonic MOF Nanoparticles

Xie

Zhang

et al. 2021

Anal. Chem.

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Benefiting from the noble metal nanoparticle core and organic porous nanoshell, plasmonic metal−organic frameworks (MOFs) become a nanostructure with great enhancement of the electromagnetic field and a high density of reaction sites, which has fantastic optical properties in surface plasmon-related fields. In this work, the plasmon-driven interfacial catalytic reactions involving p-aminothiophenol to 4,4′-dimercaptoazobenzene (trans-DMAB) in both the liquid and gaseous phases are studied in plasmonic MOF nanoparticles, which consist of a Ag nanoparticle core and an organic shell (ZIF-8). The surfaceenhanced Raman spectroscopy (SERS) spectra recorded at the plasmonic MOF in an aqueous environment demonstrate that the reversible plasmon-driven interfacial catalytic reactions could be modulated by a reductant (NaBH 4 ) or oxidant (H 2 O 2 ). Also, the situ SERS spectra also point out that plasmonic MOF (AgNP@ ZIF-8) nanoparticles exhibit much better catalytic performance in the H 2 O 2 solution compared to pure Ag nanoparticles for the antioxidation caused by the MOF shell. It is surprising that although there is greater SERS enhancement obtained at pure Ag nanoparticles, the plasmon-driven interfacial catalytic reactions only occur at plasmonic AgNP@ZIF-8 nanoparticles in the gaseous phase. This interesting phenomenon is further confirmed and analyzed by simulated electromagnetic field distributions, which could be understood by the effective capture of gaseous molecules by the organic porous nanoshell. Our work not only explores the plasmonic MOF nanoparticles with unique optical properties but also strengthens the understanding of plasmon-driven interfacial catalytic reactions.

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