Highly sensitive SERS detection in a non-volatile liquid-phase system with nanocluster-patterned optical fiber SERS probes
In: Optics express, Jg. 30 (2022-10-12), Heft 10
Online
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Zugriff:
The use of surface-enhanced Raman scattering (SERS) spectroscopy for the detection of substances in non-volatile systems, such as edible oil and biological cells, is an important issue in the fields of food safety and biomedicine. However, traditional dry-state SERS detection with planar SERS substrates is not suitable for highly sensitive and rapid SERS detection in non-volatile liquid-phase systems. In this paper, we take contaminant in edible oil as an example and propose an in situ SERS detection method for non-volatile complex liquid-phase systems with high-performance optical fiber SERS probes. Au-nanorod clusters are successfully prepared on optical fiber facet by a laboratory-developed laser-induced dynamic dip-coating method, and relatively high detection sensitivity (LOD of 2.4 × 10−6 mol/L for Sudan red and 3.6 × 10−7 mol/L for thiram in sunflower oil) and good reproducibility (RSD less than 10%) are achieved with a portable Raman spectrometer and short spectral integration time of 10 s even in complex edible oil systems. Additionally, the recovery rate experiment indicates the reliability and capability of this method for quantitative detection applications. This work provides a new insight for highly sensitive and rapid SERS detection in non-volatile liquid-phase systems with optical fiber SERS probes and may find important practical applications in food safety and biomedicine.
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Highly sensitive SERS detection in a non-volatile liquid-phase system with nanocluster-patterned optical fiber SERS probes
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Autor/in / Beteiligte Person: | Wang, Botian ; Liu, Ye ; Ai, Chuanwei ; Chu, Rang ; Chen, Manna ; Ye, Hai ; Wang, Hongcheng ; Zhou, Fei |
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Zeitschrift: | Optics express, Jg. 30 (2022-10-12), Heft 10 |
Veröffentlichung: | 2022 |
Medientyp: | unknown |
ISSN: | 1094-4087 (print) |
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