Sensitive Detection of Rhodamine B in Condiments Using Surface-Enhanced Resonance Raman Scattering (SERRS) Silver Nanowires as Substrate

Abstract

In this paper, a facile large-scale preparation of surface-enhanced resonance Raman scattering (SERRS) substrates for the determination of Rhodamine B (RhB) based on silver nanowires (Ag NWs) has been developed. The morphology, structure, and properties of as-prepared Ag NWs are characterized using ultraviolet-visible (UV-Vis) spectroscopy, field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD), respectively. Ag NWs were assembled onto glass slides through a self-assembly method. Moreover, in our experiment, as-prepared Ag NWs@glass were used as a SERRS substrate to detect RhB at the excitation wavelength of 532 nm. Experimental conditions such as pH value and soaking time on SERRS performance were studied and optimized. Under the optimized conditions, the SERRS intensity at 1648 cm exhibited a linear relationship with the concentration of RhB in the range of 1.0 × 10-1.0 × 10mol L and detection limit (signal-to-noise ratio [S/N] = 3) is as low as 0.3 nmol L. The corresponding correlation coefficient of the linear equation was 0.996. This method based on Ag NWs@glass for the detection of RhB in three kinds of condiment was investigated. The limits of detection (LODs) for RhB were 0.35 µg/g in chili powder, 0.14 µg/g in chili sauce, and 0.02 µg/g in Chinese prickly ash. The relative standard deviations (RSD) were between 2.18% and 4.56% (n = 3) and recoveries at three levels were in the range of 80.0-98.7% for different spiked food products. Moreover, the results showed that the proposed method was sensitive, convenient, and feasible for the determination of RhB in condiments.

Exploring the suitability of MXenes for sensing applications

“…Spectra were observed with films made from the neat LiF/HCl material, but not from a 1:4-diluted LiF/HCl solution or from the HCl solution. For the neat LiF/HCl films, the SERS response for Rhodamine B was linear with concentration and consistent with prior literature reports [4] obtained with a different substrate. Intrinsic fluorescence of the Rhodamine B was greatly reduced for these samples compared to dried drops of neat Rhodamine B solution.…”

Plasmon-Coupled Directional Emission from Soluplus-Mediated AgAu Nanoparticles for Attomolar Sensing Using a Smartphone

“…Molecular docking studies have confirmed damaging interaction of RhB with DNA in humans . In light of these observations, research efforts are being dedicated for early detection and analysis of trace concentrations of RhB in food safety and pharmacokinetics, in terms of qualitative and quantitative determination. − Different techniques such as capillary electrophoresis, UV–visible spectrophotometry, spectrofluorometry, enzyme-linked immunosorbent assay, high-performance liquid chromatography, chemiluminescence, and the plasmon-coupled emission platform to name a few have been developed for sensing RhB at very low concentrations. While the surface enhanced resonance Raman scattering (SERRS) platform supported by Ag nanowires as a plasmonic substrate could lower the detection limit to nanomolar levels, our earlier work using the SPCE platform lowered the detection limit to 0.1 picomolar concentrations using AgCD (silver decorated carbon dots) as efficient nanoantennas in the SPCE platform .…”

“…58−67 Different techniques such as capillary electrophoresis, UV−visible spectrophotometry, spectrofluorometry, enzyme-linked immunosorbent assay, highperformance liquid chromatography, chemiluminescence, and the plasmon-coupled emission platform to name a few have been developed for sensing RhB at very low concentrations. While the surface enhanced resonance Raman scattering (SERRS) platform supported by Ag nanowires as a plasmonic substrate could lower the detection limit to nanomolar levels, 65 our earlier work using the SPCE platform lowered the detection limit to 0.1 picomolar concentrations using AgCD (silver decorated carbon dots) as efficient nanoantennas in the SPCE platform. 18 Nevertheless, there are no reports that discuss further lowering this detection limit.…”

Tunable photoluminescence and SERS behaviour of additively manufactured Au nanoparticle patterns

“…5c and d. This might be related to the shi in the peaks due to the enhanced resonance Raman scattering 41,42 effect for 514 nm laser excitation as RhB has a sharp peak at 552 nm in UV-vis absorption, 43,44 which is close to the 514 nm excitation laser. It can be seen from Fig.…”