等离子体子
胶体金
光化学
纳米颗粒
电子转移
纳米材料
材料科学
生物传感器
纳米技术
可见光谱
化学
催化作用
光电子学
有机化学
作者
Han Xiao,Rong Liu,Hui Zhang,Quan Zhou,Wei Feng,Ke Hu
标识
DOI:10.1002/asia.202100337
摘要
Abstract Enzyme‐mimicking artificial nanomaterials often termed nanozymes have broad applications in many fields, including biosensing, pollutant degradation and cancer diagnosis. Herein, we introduce a plasmonic gold nanoparticle‐modified Mn 3 O 4 nanozyme (Mn 3 O 4 ‐Au). Visible or near infrared light excitation into the plasmonic absorption band of the surface‐bound gold nanoparticles enhances the catalytic oxidation of tetramethylbenzidine (TMB). The mechanism of light‐enhanced peroxidase activity is proposed based on the Mn 3 O 4 conduction band mediated hot electron transfer from photoexcited gold nanoparticles to H 2 O 2 which undergoes further oxygen‐oxygen bond cleavage to yield hydroxyl radical. The surface decoration of plasmonic gold nanoparticles endows Mn 3 O 4 ‐Au to be a light‐regulated nanozyme.
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