Surface-enhanced infrared absorption (SEIRA) has attracted increasing attention due to the potential of infrared spectroscopy in applications such as molecular trace sensing of solids, polymers, and proteins, specifically fueled by recent substantial developments in infrared plasmonic materials and engineered nanostructures. Here, the significant progress achieved in the past decades is reviewed, along with the current state of the art of SEIRA. In particular, the plasmonic properties of a variety of nanomaterials are discussed (e.g., metals, semiconductors, and graphene) along with their use in the design of efficient SEIRA configurations. To conclude, perspectives on potential applications, including single-molecule detection and in vivo bioassays, are presented.
Bibliographical noteFunding Information:
The authors thank Kaihui Liu for valuable discussion. This work was supported by the National Basic Key Research Program of China (Grant No. 2015CB932400), the National Key Research and Development Program of China (Grant No. 2016YFA0201600), the National Natural Science Foundation of China (Grant Nos. 51372045, 11504063, and 11674073), the key program of the bureau of Frontier Sciences and Education Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH021), Academy of Finland (Grant Nos. 276376, 284548, 295777, 304666, 312297, 312551, and 314810), TEKES (OPEC), and the European Union’s Seventh Framework Programme (REA grant agreement No. 631610). T.L. acknowledges support from the National Science Foundation under Grant No. NSF/EFRI-1741660. F.J.G.A. acknowledges the Spanish MINECO (Grant Nos. MAT2017-88492-R and SEV2015-0522), the Catalan CERCA and AGAUR (2014-SGR-1400) programs, and Fundació Privada Cellex.
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- infrared spectroscopy
- surface-enhanced spectroscopy