Facile Fabrication of Au Nanoparticles-Decorated Ni Nanocone Arrays as Effective Surface-Enhanced Raman Scattering Substrates
Facile Fabrication of Au Nanoparticles-Decorated Ni Nanocone Arrays as Effective Surface-Enhanced Raman Scattering Substrates
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DOI：
10.1149/2.0021610jes
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发表时间：
2016
影响因子：
3.9
通讯作者：
Yuanyuan Xia;X. Mo;Huiqin Ling;T. Hang;Ming Li
中科院分区：
文献类型：
--
作者：
Yuanyuan Xia;X. Mo;Huiqin Ling;T. Hang;Ming Li
采用两步电沉积方法在镍纳米锥阵列(Ni NCA)表面组装了不同尺寸的Au纳米颗粒(Au NPs)，制备了稳定、超灵敏的表面增强拉曼散射(SERS)衬底，该方法既省时又经济。可以通过改变Au沉积时间来控制在Ni纳米管上形成的Au纳米颗粒的尺寸，以获得最佳的SERS性能。用时域有限差分方法模拟了两种不同尺寸的Au纳米颗粒在这种多能级结构上的电磁场，揭示了两种不同尺寸的Au纳米颗粒间隙形成的热点对电磁场的高度增强有贡献。这种金纳米粒子修饰的镍纳米粒子基片具有高效的增强能力、重现性和可回收性，在SERS的实际应用中具有潜在的潜力。
A stable and ultrasensitive surface enhanced Raman scattering (SERS) substrate has been fabricated via assembling Au nanoparticle (Au NPs) with different sizes onto the surface of Ni nanocone arrays (Ni NCAs) routed by a two-step electrodeposition method, which is both time and cost effective. The dimension of the Au NPs formed on the Ni NCAs can be controlled by varying the Au deposition time to achieve the best SERS performance. The electromagnetic field on this multilevel hierarchy structure with two different Au NPs sizes was simulated by finite difference time domain method to reveal that hot spots formed by two kind of inter Au NPs gaps have made contributions to the highly enhanced electromagnetic field. This Au NPs-decorated Ni NCAs substrate with the efficient enhancement ability as well as the reproducibility and recyclability has potentials in practical applications of SERS.