Inkjet−Printable Nanoporous Ag Disk Arrays Enabling Coffee−Ring Effect−Driven Analyte Enrichment Towards Practical SERS Applications

To make surface enhanced Raman scattering (SERS) sensors more practical, we propose nanoporous Ag disks as SERS-active plasmonic structures that can be readily inkjet-printed just before use to avoid degradation of SERS enhancement. Together with the aid of the enhanced plasmonic fields from the nan...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing-green technology 2022-03, Vol.9 (2), p.421-429
Main Authors: Wi, Jung-Sub, Kim, Jeong Dae, Lee, Wonseok, Choi, Hyunsik, Kwak, Minjeong, Song, Jungkeun, Lee, Tae Geol, Ok, Jong G.
Format: Article
Language:English
Subjects:
Analytical chemistry
Annealing
Arrays
Coffee
Decomposition
Disks
Electric fields
Glass substrates
Hydrophobic surfaces
Inkjet printing
Nanoparticles
Oxidation
Plasmonics
Polyethylene terephthalate
Raman spectra
Scanning electron microscopy
Sensors
Solvents
Spectrum analysis
Surfactants
Titanium dioxide
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Summary:To make surface enhanced Raman scattering (SERS) sensors more practical, we propose nanoporous Ag disks as SERS-active plasmonic structures that can be readily inkjet-printed just before use to avoid degradation of SERS enhancement. Together with the aid of the enhanced plasmonic fields from the nanoporous Ag (confirmed by electromagnetic simulation), we utilize a coffee-ring effect to concentrate target analytes, which is demonstrated by confocal Raman measurements. By using the proposed SERS sensor, Raman signals of TiO2 nanoparticles with a concentration of ppm to sub-ppb have been successfully measured. TiO2 in commercial consumables has been also detected by distinguishing its crystalline phase.
ISSN:2288-6206
2198-0810
DOI:10.1007/s40684-021-00351-6