Design and fabrication of Zn@ZnO@Ag chip for Raman scattering analysis of norfloxacin in liquid milk, fish and animal feeds

Zhang, Hanqiang; Fan, Xuejing; Ding, Yangyue; Yi, Lunzhao; Ge, Kun; Gu, Ying

doi:10.1016/j.foodchem.2023.136928

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…Metronidazole (MNZ) is used primarily to prevent and treat anaerobic bacterial infections . Norfloxacin has the effect of blocking the DNA rotation enzyme of pathogenic bacteria in the digestive tract, hindering bacterial DNA replication and inhibiting bacteria . However, these antibiotics can also be harmful to human health.…”

Section: Resultsmentioning

confidence: 99%

“…46 Norfloxacin has the effect of blocking the DNA rotation enzyme of pathogenic bacteria in the digestive tract, hindering bacterial DNA replication and inhibiting bacteria. 47 However, these antibiotics can also be harmful to human health. For example, MNZ can cause cancer, 48 and norfloxacin delays the formation of juvenile bone, thereby influencing development.…”

Section: = +mentioning

confidence: 99%

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Reversible Thermoelectric Regulation of Electromagnetic and Chemical Enhancement for Rapid SERS Detection

Zhang,

Tan,

et al. 2024

ACS Appl. Mater. Interfaces

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Actively controlling surface-enhanced Raman scattering (SERS) performance plays a vital role in highly sensitive detection or in situ monitoring. Nevertheless, it is still challenging to achieve further modulation of electromagnetic enhancement and chemical enhancement simultaneously in SERS detection. In this study, a silver nanocavity structure with graphene as a spacer layer is coupled with thermoelectric semiconductor P-type gallium nitride (GaN) to form an electric-field-induced SERS (E-SERS) for dual enhancement. After applying the electric field, the intensity of SERS signals is further enhanced by over 10 times. The thermoelectric field enables fast and reproducible doping of graphene, thereby modulating its Fermi level over a wide range. The thermoelectric field also regulates the position of the plasmon resonance peak of the silver nanocavity structure, rendering synchronous dual electromagnetic and chemical regulation. Additionally, the method enables the trace detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). A detailed theoretical analysis is performed based on the experimental results and finite-element calculations, paving the way for the fabrication of high-efficient E-SERS substrates.

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Section: Resultsmentioning

confidence: 99%

Section: = +mentioning

confidence: 99%

Reversible Thermoelectric Regulation of Electromagnetic and Chemical Enhancement for Rapid SERS Detection

Zhang,

Tan,

et al. 2024

ACS Appl. Mater. Interfaces

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“…In consideration of the widespread distribution and seasonal variations of NOR in aquatic environments [9,10], it is necessary to detect NOR more frequently. At present, various laboratory instrument-based methods have been used for the determination of NOR, including electrochemical detection [11], enzymelinked immunosorbent assay (ELISA) [12], the surface-enhanced Raman scattering (SERS) method [13] and high-performance liquid chromatography (HPLC) [14]. However, the high specificity and sensitivity of the above methods often require professional operation, expensive instruments, and intricate pre-treatment processes [15][16][17], all of which are not conducive to long-term monitoring of NOR residues.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Molecularly Imprinted Fluorescent Test Strip for Rapid and Visual Detection of Norfloxacin via a Smartphone

Hu,

Zhao,

Chen

et al. 2024

Molecules

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Paper-based test strips with on-site visual detection have become a hot spot in the field of target detection. Yet, low specific surface area and uneven deposition limit the further application of test strips. Herein, a novel “turn-on” ratio of molecularly imprinted membranes (Eu@CDs-MIMs) was successfully prepared based on a Eu complex-doped polyvinylidene fluoride membrane for the selective, rapid and on-site visual detection of norfloxacin (NOR). The formation of surface-imprinted polymer-containing carbon dots (CDs) improves the roughness and hydrophilicity of Eu@CDs-MIMs. Fluorescence lifetimes and UV absorption spectra verified that the fluorescence enhancement of CDs is based on the synergistic effect of charge transfer and hydrogen bonding between CDs and NOR. The fluorescent test strip showed a linear fluorescent response within the concentration range of 5–50 nM with a limit of detection of 1.35 nM and a short response time of 1 min. In comparison with filter paper-based test strips, Eu@CDs-MIMs exhibit a brighter and more uniform fluorescent color change from red to blue that is visible to the naked eye. Additionally, the applied ratio fluorescent test strip was combined with a smartphone to translate RGB values into concentrations for the visual and quantitative detection of NOR and verified the detection results using high-performance liquid chromatography. The portable fluorescent test strip provides a reliable approach for the rapid, visual, and on-site detection of NOR and quinolones.

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Recent advances of MOF-based SERS substrates in quantitative analysis of food contaminants: a review

Gu,

Pu,

Chen

et al. 2024

Analyst

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Design and fabrication of Zn@ZnO@Ag chip for Raman scattering analysis of norfloxacin in liquid milk, fish and animal feeds

Cited by 3 publications

References 30 publications

Reversible Thermoelectric Regulation of Electromagnetic and Chemical Enhancement for Rapid SERS Detection

Reversible Thermoelectric Regulation of Electromagnetic and Chemical Enhancement for Rapid SERS Detection

Enhanced Molecularly Imprinted Fluorescent Test Strip for Rapid and Visual Detection of Norfloxacin via a Smartphone

Recent advances of MOF-based SERS substrates in quantitative analysis of food contaminants: a review

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