Au-ZnO hybrid nanoparticles exhibiting strong charge-transfer-induced SERS for recyclable SERS-active substrates
Au-ZnO hybrid nanoparticles exhibiting strong charge-transfer-induced SERS for recyclable SERS-active substrates
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Au-ZnO 杂化纳米粒子对可回收 SERS 活性基底表现出强电荷转移诱导 SERS
DOI：
10.1039/c5nr00491h
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发表时间：
2015-01-01
期刊：
影响因子：
6.7
通讯作者：
Cheng, Zhaohua
中科院分区：
文献类型：
--
作者：
Liu, Liping;Yang, Haitao;Cheng, Zhaohua
通过晶种生长和随后对 Au-ZnO 核壳纳米颗粒进行湿化学蚀刻，制备了花形 Au-ZnO 杂化纳米颗粒。蚀刻的Au-ZnO杂化纳米粒子表现出比单独的Au纳米粒子更强的PATP分子非完全对称(b(2))振动模式的表面增强拉曼散射(SERS)信号，这归因于ZnO层的化学增强效应，其被Au的局域表面等离子体共振(LSPR)极大地激发 核心。此外，局域表面等离子体共振增强电荷转移（CT）效应的机制已通过使用325至785 nm不同激光源激发的PATP分子的SERS光谱得到证明。此外，光催化实验结果表明，Au-ZnO杂化纳米颗粒有望作为不同分子物种的生物相容性和可回收的SERS活性平台。
Flower-shaped Au-ZnO hybrid nanoparticles have been prepared via seeding growth and subsequent wet-chemical etching of Au-ZnO core-shell nanoparticles. The etched Au-ZnO hybrid nanoparticles have shown a stronger surface-enhanced Raman scattering (SERS) signal of the nontotally symmetric (b(2)) vibrational modes of PATP molecules than Au nanoparticles alone, which is attributed to the chemical enhancement effect of the ZnO layer which is greatly excited by the localized surface plasmon resonance (LSPR) of Au cores. Further, the mechanism of the LSPR-enhanced charge transfer (CT) effect has been proved by the SERS spectra of PATP molecules excited using different laser sources from 325 to 785 nm. Moreover, the photocatalytic experimental results indicated that Au-ZnO hybrid nanoparticles are promising as biologically compatible and recyclable SERS-active platforms for different molecular species.