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Plasmonic Core/Satellite Heterostructure with Hierarchical Nanogaps for Raman Spectroscopy Enhanced by Shell‐Isolated Nanoparticles
Author(s) -
He Ru,
Cheng Yuchuan,
Jin Ting,
Jiang Meng,
Chen Chao,
Xu Gaojie
Publication year - 2014
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201400095
Subject(s) - materials science , plasmon , heterojunction , raman spectroscopy , nanoparticle , nanotechnology , spectroscopy , plasmonic nanoparticles , optoelectronics , optics , physics , quantum mechanics
A plasmonic core/satellite heterostructure is synthesized through an electrostatic self‐assembly protocol. The heterostructure comprises C‐coated Ag nanoparticles known as Ag@C shell‐isolated nanoparticles (SHINs) acting as satellite particles and a C‐coated Fe 3 O 4 dielectric particle core (Fe 3 O 4 @C). The enhanced electromagnetic field generated from the hierarchical nanoscale gaps found among the particles makes high‐quality Raman spectra possible. As a result, shell‐isolated‐nanoparticle‐enhanced Raman spectroscopy (SHINERS) based on this heterostructure is successfully applied for in‐situ trace‐amount detection of perylene in water. There is potential for its use in ultrasensitive detection in the liquid phase with real‐time monitoring. This work offers a new strategy for developing SHINs to improve the performance of SHINERS.