期刊
ANALYTICAL CHEMISTRY
卷 92, 期 2, 页码 1972-1977出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.9b04339
关键词
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资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2017R1A2B3002796]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2017R1A5A1015365]
- Agency for Defense Development through Chemical and Biological Detection Research Center [UD170024ID]
This paper reports a methodology for synthesizing and ordering gold nanoframes into three-dimensional (3D) arrays with a controlled thickness, leading to homogeneous plasmonic superstructures, with which quantitative analysis via surface-enhanced Raman spectroscopy (SERS) has been successfully demonstrated. Because this preparation method allows for systematic control of nanoframe film thickness and the resulting 3D plasmonic superstructure, which exhibits a unique nanoporous network of hot-spots, detection limits down to 10(-18) M, corresponding to approximate to 6000 molecules, have been measured. Compared to analogous solid nanoparticle superstructures, the nanoframe superstructures with their unique nanoporous architecture effectively dissipate the heat inevitably generated by laser excitation during measurement, effectively suppressing the formation of carbonaceous materials and therefore their accompanying fluorescence interference, especially important for low concentration detection.
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