Karthick Kannan Padmanathan, Shankar Prabakaran, Blackman Chris, Chung Chan-Hwa
School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Adv Mater. 2019 Aug;31(34):e1803432. doi: 10.1002/adma.201803432. Epub 2019 Feb 18.
Surface-enhanced Raman spectroscopy is a powerful and sensitive analytical tool that has found application in chemical and biomolecule analysis and environmental monitoring. Since its discovery in the early 1970s, a variety of materials ranging from noble metals to nanostructured materials have been employed as surface enhanced Raman scattering (SERS) substrates. In recent years, 2D inorganic materials have found wide use in the development of SERS-based chemical sensors owing to their unique thickness dependent physico-chemical properties with enhanced chemical-based charge-transfer processes. Here, recent advances in the application of various 2D inorganic nanomaterials, including graphene, boron nitride, semiconducting metal oxides, and transition metal chalcogenides, in chemical detection via SERS are presented. The background of the SERS concept, including its basic theory and sensing mechanism, along with the salient features of different nanomaterials used as substrates in SERS, extending from monometallic nanoparticles to nanometal oxides, is comprehensively discussed. The importance of 2D inorganic nanomaterials in SERS enhancement, along with their application toward chemical detection, is explained in detail with suitable examples and illustrations. In conclusion, some guidelines are presented for the development of this promising field in the future.
表面增强拉曼光谱是一种强大且灵敏的分析工具，已在化学和生物分子分析以及环境监测中得到应用。自20世纪70年代初被发现以来，从贵金属到纳米结构材料等多种材料已被用作表面增强拉曼散射（SERS）基底。近年来，二维无机材料因其独特的厚度依赖性物理化学性质以及增强的基于化学的电荷转移过程，在基于SERS的化学传感器开发中得到了广泛应用。本文介绍了包括石墨烯、氮化硼、半导体金属氧化物和过渡金属硫族化物在内的各种二维无机纳米材料在通过SERS进行化学检测方面的最新进展。全面讨论了SERS概念的背景，包括其基本理论和传感机制，以及从单金属纳米颗粒到纳米金属氧化物等用作SERS基底的不同纳米材料的显著特征。通过合适的示例和图示详细解释了二维无机纳米材料在SERS增强中的重要性及其在化学检测中的应用。总之，为未来这一有前景的领域的发展提出了一些指导方针。
