Controlling dynamic SERS hot spots on a monolayer film of Fe 3 O 4 @Au nanoparticles by a magnetic field

Qinghua Guo,Chenjie Zhang,Chao Wei,Minmin Xu,Yaxian Yuan,Renao Gu,Jianlin Yao

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy（2016）

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摘要

•Fe3O4@Au nanoparticles monolayer film was fabricated at hexane/water interface.•The interparticle spacing was dynamically tuned by external magnetic field.•The response of SERS effect to the magnetic field was completely reversible.•The magnetism responsive film was used as substrate with tunable optical properties.

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关键词

Surface-enhanced Raman spectroscopy (SERS),Fe3O4@Au,Magnetic field,Dynamic hot spots,Monolayer film

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