Elevating Surface-Enhanced Infrared Absorption with Quantum Mechanical Effects of Plasmonic Nanocavities

Autor:	Guangyan Huang, Kaizhen Liu, Guangyi Shi, Qianqian Guo, Xiang Li, Zeke Liu, Wanli Ma, Tao Wang
Rok vydání:	2022
Předmět:	Spectrophotometry Infrared Mechanical Engineering Nanoparticles General Materials Science Bioengineering Gold General Chemistry Condensed Matter Physics
Zdroj:	Nano Letters. 22:6083-6090
ISSN:	1530-6992 1530-6984
Popis:	Plasmonic nanocavities, with the ability to localize and concentrate light into nanometer-scale dimensions, have been widely used for ultrasensitive spectroscopy, biosensing, and photodetection. However, as the nanocavity gap approaches the subnanometer length scale, plasmonic enhancement, together with plasmonic enhanced optical processes, turns to quenching because of quantum mechanical effects. Here, instead of quenching, we show that quantum mechanical effects of plasmonic nanocavities can elevate surface-enhanced infrared absorption (SEIRA) of molecular moieties. The plasmonic nanocavities, nanojunctions of gold and cadmium oxide nanoparticles, support prominent mid-infrared plasmonic resonances and enable SEIRA of an alkanethiol monolayer (CH
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::817410f18940627fe7fb43437afdd10d https://doi.org/10.1021/acs.nanolett.2c01042 Zobrazit plný text záznamu