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

Zhao, Xiaofei; Li, Chonghui; Li, Zhen; Yu, Jing; Pan, Jie; Si, Huaijun; Yang, Cheng; Jiang, Shouzhen; Zhang, Chao; Man, Baoyuan

doi:10.1515/nanoph-2019-0124

Cited by 45 publications

(17 citation statements)

References 38 publications

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“…The reason can be attributed to the fact that Au and Ag electromagnetic field synergistic enhancement in nanofibers can provide abundant SESR hot spots. The laser can not only irradiate Ag nanoparticles on the fibers’ surface, but also pass through the surface SiO 2 nanofibers and come into contact with the embedded Au nanoparticles, thus causing plasmon resonance [ 10 ]. Similarly, Figure 7 b,d show the SERS detection results of the as-prepared samples on another probe molecule, i.e., 4-MBA.…”

Section: Resultsmentioning

confidence: 99%

“…Zhao et al prepared a highly sensitive three-dimensional porous maize-like Ag nanoparticles/polyvinyl alcohol (PVA)@Ag SERS substrate through electrospinning and thermal evaporation technology. Due to the synergistic effect of internal and external Ag nanoparticles, it has good detection sensitivity for crystal violet and malachite green molecules [ 10 ]. Compared with the traditional preparation method, electrospinning is a versatile technique employed for fabricating nanofibrous films.…”

Section: Introductionmentioning

confidence: 99%

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Loading of Au/Ag Bimetallic Nanoparticles within and Outside of the Flexible SiO2 Electrospun Nanofibers as Highly Sensitive, Stable, Repeatable Substrates for Versatile and Trace SERS Detection

et al. 2020

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In this paper, we propose a facile and cost-effective electrospinning technique to fabricate surface-enhanced Raman scattering (SERS) substrates, which is appropriate for multiple analytes detection. First of all, HAuCl4∙3H2O was added into the TEOS/PVP precursor solution, and flexible SiO2 nanofibers incorporated with gold nanoparticles (SiO2@Au) were prepared by electrospinning and calcination. Subsequently, the nanofibrous membranes were immersed in the tannic acid and 3-aminopropyltriethoxysilane solution for surface modification through Michael addition reaction. Finally, the composite nanofibers (Ag@T-A@SiO2@Au) were obtained by the in-situ growth of Ag nanoparticles on the surfaces of nanofibers with tannic acid as a reducing agent. Due to the synergistic enhancement of Au and Ag nanoparticles, the flexible and self-supporting composite nanofibrous membranes have excellent SERS properties. Serving as SERS substrates, they are extremely sensitive to the detection of 4-mercaptophenol and 4-mercaptobenzoic acid, with an enhancement factor of 108. Moreover, they could be utilized to detect analytes such as pesticide thiram at a low concentration of 10−8 mol/L, and the substrates retain excellent Raman signals stability during the durability test of 60 days. Furthermore, the as-fabricated substrates, as a versatile SERS platform, could be used to detect bacteria of Staphylococcus aureus without a specific and complicated bacteria-aptamer conjugation procedure, and the detection limit is up to 103 colony forming units/mL. Meanwhile, the substrates also show an excellent repeatability of SERS response for S. aureus organelles. Briefly, the prime novelty of this work is the fabrication of Au/Ag bimetallic synergetic enhancement substrates as SERS platform for versatile detection with high sensitivity and stability.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Loading of Au/Ag Bimetallic Nanoparticles within and Outside of the Flexible SiO2 Electrospun Nanofibers as Highly Sensitive, Stable, Repeatable Substrates for Versatile and Trace SERS Detection

et al. 2020

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“…Figure 3D depicts the Raman spectra of CV at the concentration of 10 −5 M from 20 randomly selected positions on the substrate. The relative standard deviation (RSD) value of the prominent peak at 910 cm −1 of CV spectrum from 20 measurements (the inset) was 13.3%, which was significantly lower than that of the scientific requirements (20%) [38]. Figure 3E illustrates the SERS spectra of CV at the concentration of 10 −5 M, absorbed on the PDMS/Ag-AgNPs substrate collected from 10 measurements of different substrates.…”

Section: Sers Substrate Enhancement Factor (Ef) Referencesmentioning

confidence: 93%

Rapid Quantitative Determination of Multiple Pesticide Residues in Mango Fruits by Surface-Enhanced Raman Spectroscopy

et al. 2022

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Imidacloprid, acephate, and carbaryl are common insecticides that are extensively used in planting mango, a well-known fruit in Vietnam, to ease mango hopper issues. The accurate detection of pesticide residues is critical for mango export to meet quality criteria. This study developed a novel SERS platform by using polydimethylsiloxane (PDMS) to simulate the rose petal structure incorporated with a silver coating layer and silver nanoparticles (AgNPs) to detect imidacloprid, acephate, and carbaryl in mango fruits. In this paper, the rose petal PDMS/Ag-AgNPs replica was considered the most efficient substrate for SERS measurement with an EF of 4.7 × 107. The Raman spectra of the three insecticides obtained from the PDMS/Ag-AgNPs substrate were clearly observed with their characteristic peaks of 1105 cm−1 for imidacloprid, 1083 cm−1, and 1579 cm−1 for acephate, and 727 cm−1 and 1378 cm−1 for carbaryl. The application of PDMS/Ag-AgNPs substrate in quantitative analysis of the three pesticides in mango fruit was evaluated. As a result, the limit of detection was 0.02 mg/kg for imidacloprid, 5 × 10−5 mg/kg for acephate, and 5 × 10−3 mg/kg for carbaryl. The SERS result also revealed that the pesticide residues in the mango sample were within an acceptable limit. This suggested the possibility of the rose petal PDMS/Ag-AgNPs replica for rapid quantification of pesticide residues not only in mango fruit but also in many other agricultural products.

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“…When used as SERS substrates, electrospun fibers self‐supported matrixes show the following merits: large surface‐to‐volume ratio, flexibility in surface functionalities, and tunable porosity. [ 23,52–54 ] The strategies of synthesizing electrospun‐based flexible SERS substrates can be divided into the following three catalogs: the spinning solution containing metal nanomaterials and polymers is directly spun into silk, [ 52 ] metal precursor dispersed in the polymer solutions are first spun into silk and then undergo the post‐treatment to transfer metal ions into metal nanoparticles, [ 55 ] and polymer solutions are first spun into fiber followed by in situ synthesis or assembly metal nanoparticles on the surface of electrospun fibers. [ 53,56 ] Since the morphology of noble metal is crucial for SERS activity of the flexible substrate as we have mentioned above, Au and Ag nanospheres, nanoplates, nanostars, and nanorods have been well‐designed and used to composite with electrospun fibers in recent years.…”

Section: Fabrication Of Flexible Sers Substratementioning

confidence: 99%

Flexible Surface‐Enhanced Raman Scattering Substrates: A Review on Constructions, Applications, and Challenges

Liu

Cao

2021

Adv Materials Inter

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Flexible surface‐enhanced Raman scattering (SERS) substrates have recently attracted growing research interests in real‐world applications due to their unique advantage of sensitivity and flexibility. Reviewing the latest progress of flexible SERS substrates is very important for further development of high‐quality detection platforms. Herein, the recent developments of flexible SERS substrates in fabrications and applications are introduced. First, three categories of current flexible SERS platforms including paper‐based SERS substrates, polymer‐based SERS substrates, and inorganic materials‐based SERS substrates are demonstrated in depth. Then, the focus is moved to the applications of flexible SERS substrates. Combining swab strategies, lateral flow strips, paper‐based microfluidics, and in situ detection techniques, flexible SERS platforms provide intriguing applications in various fields. The challenges are also identified for practical applications on account of substrates’ uniformity, quantitative accuracy, multiplex detection ability, and overall cost. It is believed this review will be of help for researchers to design and fabricate flexible SERS substrates with higher performance and lower cost, and finally realize the practical applications.

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

Cited by 45 publications

References 38 publications

Loading of Au/Ag Bimetallic Nanoparticles within and Outside of the Flexible SiO2 Electrospun Nanofibers as Highly Sensitive, Stable, Repeatable Substrates for Versatile and Trace SERS Detection

Loading of Au/Ag Bimetallic Nanoparticles within and Outside of the Flexible SiO2 Electrospun Nanofibers as Highly Sensitive, Stable, Repeatable Substrates for Versatile and Trace SERS Detection

Rapid Quantitative Determination of Multiple Pesticide Residues in Mango Fruits by Surface-Enhanced Raman Spectroscopy

Flexible Surface‐Enhanced Raman Scattering Substrates: A Review on Constructions, Applications, and Challenges

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