Qiu Teng, Zhang Wenjun, Chu Paul K
Department of Physics, Southeast University, Nanjing 211189, PR China.
Recent Pat Nanotechnol. 2009;3(1):10-20. doi: 10.2174/187221009787003357.
Surface-enhanced Raman scattering (SERS) is recognized as one of the most sensitive spectroscopic tools offering highly sensitive chemical and biological detection. The fact that particle plasmon allows direct coupling of light to resonant electron plasmon oscillation has spurred tremendous efforts in the design and fabrication of highly SERS-active substrates in nanostructured films and metallic nanoparticles. Theoretical studies have shown that symmetry breaking allows for more complex plasmon propagation, potentially leading to more intense electromagnetic field generation along the structure and in gaps formed between these materials. Anisotropic metallic nanostructures have all of the characteristics that make them excellent candidates as SERS substrates. Thus, SERS is expected from anisotropic materials. This review focuses on the progress and advances in the design and fabrication of anisotropic nanostructures for SERS, with an emphasis on future challenges.
表面增强拉曼散射（SERS）被认为是最灵敏的光谱工具之一，可实现高灵敏度的化学和生物检测。粒子等离子体能够使光直接耦合到共振电子等离子体振荡，这一事实推动了人们在纳米结构薄膜和金属纳米颗粒中设计和制造高SERS活性基底方面做出了巨大努力。理论研究表明，对称性破缺允许更复杂的等离子体传播，这可能会在结构以及这些材料之间形成的间隙中产生更强的电磁场。各向异性金属纳米结构具备使其成为SERS基底的优异候选材料的所有特性。因此，预计各向异性材料会产生SERS效应。本综述着重介绍用于SERS的各向异性纳米结构在设计和制造方面的进展，并强调未来面临的挑战。
