Quaternized chitosan/silver nanoparticles composite as a SERS substrate for detecting tricyclazole and Sudan I

Chen, Kaihang; Shen, Zuguang; Luo, Jiwen; Wang, Xiaoying; Sun, Rong

doi:10.1016/j.apsusc.2015.05.149

Cited by 38 publications

(10 citation statements)

References 42 publications

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“…We further used the proposed flexible AgNPs/PVA@Ag nanofibers substrate to detect the more complicated sample matrices composed by the Sudan I (10 −6 m), CV (10 −9 m) and MG molecule (10 −7 m). The red dashed line present the corresponding characteristic peak of Sudan I, and its peaks at 733 cm −1 and 1390 cm −1 arose from ring breathing and C=C bonds in the benzene rings [36]. The purple dashed line was the peaks of CV molecule at 1376 cm −1 and 1541 cm −1 , and green dashed line showed the presence of MG at 921 cm −1 , 1215 cm −1 and 1595 cm −1 .…”

Section: Resultsmentioning

confidence: 93%

In-situ electrospun aligned and maize-like AgNPs/PVA@Ag nanofibers for surface-enhanced Raman scattering on arbitrary surface

Zhao

et al. 2019

Nanophotonics

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An efficient electrospun aligned surface enhanced Raman scattering (SERS) and maize-like substrate of polyvinyl alcohol (PVA) composite and Ag colloid nanofibers decorated with thermal evaporated Ag nanoparticles (AgNPs) has been developed by taking advantage of electrostatic interactions. The synergistic effects of the evaporated AgNPs (niblets) and the Ag colloid in PVA (corncob) could arouse strong electromagnetic field between the lateral and vertical nanogaps which has been demonstrated by experiment and finite-different time-domain (FDTD) simulation. In this experiment, the aligned nanofibers possesses an excellent sensitivity by detection of crystal violet (CV) and malachite green (MG) molecule at low concentration. Moreover, the proposed flexible SERS sensor was measured with outstanding uniformity and reproducibility. We also carried out in-situ electrospinning on a curved surface to detect the mixture of Sudan I, CV and MG molecule, which demonstrates that flexible SERS sensor, has enormous potential in accurate and in-situ detection on the complex geometric structure.

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Section: Resultsmentioning

confidence: 93%

In-situ electrospun aligned and maize-like AgNPs/PVA@Ag nanofibers for surface-enhanced Raman scattering on arbitrary surface

Zhao

et al. 2019

Nanophotonics

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“…Apparently, XRD methods detected Si in the fiber more effectively at 3% silicon loading level in the fiber. After HF acid treatment, a typical XRD pattern of p-PAN/CNC/Ag nanofibers showed diffraction peaks with 2θ values located at around 38.2°, 44.2°, 64.4°, and 77.4°, which, respectively, corresponded to the (111), (200), (220), and (311) crystallographic planes of the face-centered cubic structure of AgNPs [ 3 , 35 ]. This result indicates that additional AgNPs were formed during the HF acid treatment process, which allowed XRD technique to successfully detect them and the results are consistent with the SEM results.…”

Section: Resultsmentioning

confidence: 99%

Electrospun Nanofibers Made of Silver Nanoparticles, Cellulose Nanocrystals, and Polyacrylonitrile as Substrates for Surface-Enhanced Raman Scattering

et al. 2017

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Nanofibers with excellent activities in surface-enhanced Raman scattering (SERS) were developed through electrospinning precursor suspensions consisting of polyacrylonitrile (PAN), silver nanoparticles (AgNPs), silicon nanoparticles (SiNPs), and cellulose nanocrystals (CNCs). Rheology of the precursor suspensions, and morphology, thermal properties, chemical structures, and SERS sensitivity of the nanofibers were investigated. The electrospun nanofibers showed uniform diameters with a smooth surface. Hydrofluoric (HF) acid treatment of the PAN/CNC/Ag composite nanofibers (defined as p-PAN/CNC/Ag) led to rougher fiber surfaces with certain pores and increased mean fiber diameters. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results confirmed the existence of AgNPs that were formed during heat and HF acid treatment processes. In addition, thermal stability of the electrospun nanofibers increased due to the incorporation of CNCs and AgNPs. The p-PAN/CNC/Ag nanofibers were used as a SERS substrate to detect p-aminothiophenol (p-ATP) probe molecule. The results show that this substrate exhibited high sensitivity for the p-ATP probe detection.

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“…The SPR absorbance for the AgNPs which were synthesized from silver nitrate with the concentration of 1.0 and 1.5 × 10 -3 mol L -1 could not be determined because they were too high to be measured by the instrument. The higher SPR absorbance indicates the higher number of the synthesized AgNPs in the solution [22]. The concentration of the AgNPs was calculated based on the SPR absorbance referring to Paramelle et al [21].…”

Section: Synthesis and Characterization Of Silver Nanoparticlesmentioning

confidence: 99%

Antibacterial Activity of Silver Nanoparticles Capped by p-Aminobenzoic Acid on Escherichia coli and Staphylococcus aureus

2019

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This paper describes the antibacterial performance of silver nanoparticles (AgNPs) which have been synthesized by using p-aminobenzoic acid as reducing and stabilizing agent simultaneously. The silver nitrate with various concentrations was reacted with pH 11-adjusted p-aminobenzoic acid with a concentration of 5 × 10–3 mol L–1 for 30 min in a boiling water bath. The synthesized AgNPs were characterized by UV-Vis spectrophotometry, Transmission Electron Microscope (TEM), and Particle Size Analyzer (PSA). The antibacterial performance of the synthesized AgNPs was evaluated by agar well diffusion method on Escherichia coli and Staphylococcus aureus. The higher silver nitrate concentration, the bigger the nanoparticle size, the wider particle size distribution, and the higher number of AgNPs formed. AgNPs synthesized from higher silver nitrate concentration had higher antibacterial activity. It is an indication that the antibacterial activity of AgNPs is mainly controlled by the silver ion concentration which influences the AgNPs particle size and existence of silver ion in the AgNPs colloidal solution

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Quaternized chitosan/silver nanoparticles composite as a SERS substrate for detecting tricyclazole and Sudan I

Cited by 38 publications

References 42 publications

In-situ electrospun aligned and maize-like AgNPs/PVA@Ag nanofibers for surface-enhanced Raman scattering on arbitrary surface

In-situ electrospun aligned and maize-like AgNPs/PVA@Ag nanofibers for surface-enhanced Raman scattering on arbitrary surface

Electrospun Nanofibers Made of Silver Nanoparticles, Cellulose Nanocrystals, and Polyacrylonitrile as Substrates for Surface-Enhanced Raman Scattering

Antibacterial Activity of Silver Nanoparticles Capped by <i>p</i>-Aminobenzoic Acid on <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>

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