期刊
ACS NANO
卷 14, 期 7, 页码 8838-8845出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c03462
关键词
surface-enhanced Raman spectroscopy (SERS); plasmonics; epitaxial aluminum film; monolayer transition metal dichalcogenide; UV-SERS; SERS substrate
类别
资金
- Ministry of Science and Technology in Taiwan [MOST 108-2119-M-007-008, MOST 107-2923-M-007-004-MY3]
- Frontier Research Center on Fundamental and Applied Sciences of Matters at National Tsing-Hua University, the Featured Areas Research Center Program within the Ministry of Education in Taiwan
Surface-enhanced Raman spectroscopy (SERS) is an ultrasensitive technique to identify vibrational fingerprints of trace analytes. However, present SERS techniques suffer from the lack of uniform, reproducible, and stable substrates to control the plasmonic hotspots in a wide spectral range. Here, we report the promising application of epitaxial aluminum films as a scalable plasmonic platform for SERS applications. To assess the uniformity of aluminum substrates, atomically thin transition metal dichalcogenide monolayers are used as the benchmark analyte due to their inherent two-dimensional homogeneity. Besides the distinctive spectral capability of aluminum in the ultraviolet (325 nm), we demonstrate that the aluminum substrates can even perform comparably with the silver counterparts made from single-crystalline colloidal silver crystals using the same SERS substrate design in the visible range (532 nm). This is unexpected from the prediction solely based on optical dielectric functions and illustrate the superior surface and interface properties of epitaxial aluminum SERS substrates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据