Facile synthesis of cellulose nanofiber nanocomposite as a SERS substrate for detection of thiram in juice

Xiong, Ziyi; Lin, Mengshi; Lin, Hetong; Huang, Meizhen

doi:10.1016/j.carbpol.2018.02.014

Cited by 96 publications

(33 citation statements)

References 26 publications

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“…Figure 9a shows the SERS spectra of thiram with concentrations increasing from 10 −8 to 10 −3 mol/L. From Figure 9a, it can be found that the Raman characteristic peaks of thiram appear at 560, 928, 1150, 1386 and 1514 cm −1 , respectively, which are consistent with the results reported in the literature [38]. At the same time, within the concentration range shown in this figure, the intensity of characteristic peak at 1386 cm −1 was used as the quantitative basis to evaluate the SERS sensitivity.…”

Section: Sers Activities For Small Moleculessupporting

confidence: 87%

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: Sers Activities For Small Moleculessupporting

confidence: 87%

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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“…To further evaluate the SERS sensitivity, the CS@PDA@AgNPs swabs were immersed into an NBA solution with different concentration ranging from 1 × 10 −3 to 1 × 10 −11 M. After the CS@PDA@AgNPs swabs were dried, the responding SERS spectra were collected. From Figure 5a, the Raman signal intensity of the NBA molecules decreased promptly with concentrations ranging from 1 × 10 −3 to 1 × 10 −11 M. When the NBA concentration was lower than 1 × 10 −10 M, the characteristic peaks, such as at 591 cm −1 and 1640 cm −1 , could still be observed [41,42]. If the concentration further decreased to 1 × 10 −11 M, the above characteristic Raman peaks of the NBA molecules could not be distinctly detected, and the limit of detection (LOD) for the NBA molecules was approximately 1 × 10 −10 M. Furthermore, Figure 5b shows the relationship of the signal intensity of the NBA molecules with the solution concentration from 1 × 10 −3 to 1 × 10 −10 M. According to the characteristic peak intensities at 591 cm −1 , the signal intensity of the NBA molecules was sharply enhanced with an increase of the corresponding logarithmic concentration, which was fairly favorable to the quantitative determination for target molecules.…”

Section: Resultsmentioning

confidence: 99%

Mussel-Inspired Fabrication of SERS Swabs for Highly Sensitive and Conformal Rapid Detection of Thiram Bactericides

Zhang

et al. 2019

Nanomaterials

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As an important sort of dithiocarbamate bactericide, thiram has been widely used for fruits, vegetables and mature crops to control various fungal diseases; however, the thiram residues in the environment pose a serious threat to human health. In this work, silver nanoparticles (AgNPs) were grown in-situ on cotton swab (CS) surfaces, based on the mussel-inspired polydopamine (PDA) molecule and designed as highly sensitive surface-enhanced Raman scattering (SERS) swabs for the conformal rapid detection of bactericide residues. With this strategy, the obtained CS@PDA@AgNPs swabs demonstrated highly sensitive and reproducible Raman signals toward Nile blue A (NBA) probe molecules, and the detection limit was as low as 1.0 × 10−10 M. More critically, these CS@PDA@AgNPs swabs could be served as flexible SERS substrates for the conformal rapid detection of thiram bactericides from various fruit surfaces through a simple swabbing approach. The results showed that the detection limit of thiram residues from pear, grape and peach surfaces was approximately down to the level of 0.12 ng/cm2, 0.24 ng/cm2 and 0.15 ng/cm2 respectively, demonstrating a high sensitivity and excellent reliability toward dithiocarbamate bactericides. Not only could these SERS swabs significantly promote the collection efficiency of thiram residues from irregular shaped matrices, but they could also greatly enhance the analytical sensitivity and reliability, and would have great potential for the on-site detection of residual bactericides in the environment and in bioscience fields.

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“…Nanocellulose/polypyrrole [111] Nanocellulose/polyethylene [112] Graphene/nanocellulose/silicon [113] Solar cells/panels Nanofibers from sisal with graphene oxide [73] (Super)capacitors Bacterial nanocellulose/carbon nanotubes/triblock-copolymer ion gels [114] Nanocellulose with polyaniline [115] Acoustics Membranes for loudspeakers Cellulose nanofibers with Fe3O4 nanoparticles [71] (Bio)sensors Optical SERSbased Detection of pesticides, dyes, bacteria [116,117] Optical fluorescencebased Detection of heavy metals [118] Detection of thiols [119] Detection of elastase [120] Chemical Detection of vapors (NH3.H2O, H2O, HCl, acetic acid) [16] Electrochemical Detection of cations in biological fluids (Na + , K + , Ca 2+ ) [38] Detection of cholesterol [121] Detection of avian leukosis virus [122] Piezoelectric Based on bacterial cellulose [123] Based on plant-derived cellulose nanofibrils [124] Based on nanocellulose with chitosan [125] Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 14 December 2018 Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 14 December 2018 doi:10.20944/preprints201812.0170.v1…”

Section: Lithium Batteriesmentioning

confidence: 99%

Nanocellulose in Biotechnology and Medicine: Focus on Skin Tissue Engineering and Wound Healing

Bacakova¹,

Pajorová²,

Bačáková³

et al. 2018

Preprint

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Nanocellulose is cellulose in the form of nanostructures, i.e. features not exceeding 100 nm at least in one dimension. These nanostructures include nanofibrils, e.g. in bacterial cellulose; nanofibers, e.g. in electrospun matrices; nanowhiskers and nanocrystals. These structures can be further assembled into bigger 2D and 3D nano-, micro- and macro-structures, such as nanoplatelets, membranes, films, microparticles and porous macroscopic matrices. There are four main sources of nanocellulose: bacteria (Gluonacetobacter), plants (trees, shrubs, herbs), algae (Cladophora) and animals (Tunicata). Nanocellulose has emerged for a wide range of industrial, technology and biomedical applications, e.g. for adsorption, ultrafiltration, packaging, conservation of historical artifacts, thermal insulation and fire retardation, energy extraction and storage, acoustics, sensorics, controlled drug delivery, and particularly for tissue engineering. Nanocellulose is promising for use in scaffolds for engineering of blood vessels, neural tissue, bone, cartilage, liver, adipose tissue, urethra and dura mater, for repairing connective tissue and congenital heart defects, and for constructing contact lenses and protective barriers. This review is focused on applications of nanocellulose in skin tissue engineering and wound healing as a scaffold for cell growth, for delivering cells into wounds, and as a material for advanced wound dressings coupled with drug delivery, transparency and sensorics. Potential cytotoxicity and immunogenicity of nanocellulose are also discussed.

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Facile synthesis of cellulose nanofiber nanocomposite as a SERS substrate for detection of thiram in juice

Cited by 96 publications

References 26 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

Mussel-Inspired Fabrication of SERS Swabs for Highly Sensitive and Conformal Rapid Detection of Thiram Bactericides

Nanocellulose in Biotechnology and Medicine: Focus on Skin Tissue Engineering and Wound Healing

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