Large-scale preparation of flexible and reusable surface-enhanced Raman scattering platform based on electrospinning AgNPs/PCL nanofiber membrane

Shi, Jihua; You, Tingting; Gao, Yukun; Liang, Xiu; Li, Chenling; Yin, Ping

doi:10.1039/c7ra09726c

Cited by 17 publications

(10 citation statements)

References 24 publications

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“…Owing to its high sensitivity, excellent selectivity, reproducible ability and nondestructive data acquisition [13,14,15], SERS provides a robust and powerful detection technique for efficaciously identifying chemical and biological species in the fields of environmental monitoring [16], explosives detection [17,18] and biomedical science [19]. Thus, compared to the above mentioned analytical methods, SERS would be an excellent technique for the label-free and sensitive detection of thiram, and it would be expected to be one of the best candidates for on-site bactericide detection in real applications [12,20].…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…Initially at t ≤ 1 min, only MP vibrational modes at 1079 and 1170 cm –1 are observed (Figure b-i; Figure S10). The former is attributed to a combination of benzene ring breathing mode and C–S stretching (β CCC +ν CS ) while the latter corresponds to MP’s β CH mode . Temporal SERS investigation unveils continuous evolution of SERS spectra throughout the CO 2 sorption process.…”

Section: Resultsmentioning

confidence: 88%

“…In contrast, control methylbenzenethiol (MBT)-functionalized Ag nanocubes without chemical interaction with the ZIF layer only exhibit Zn–N XPS features (Figure e) and no change to the binding energies of other elements upon ZIF formation (Figure S7). Moreover, Zn–O bond formation in Ag-MP@ZIF is also demonstrated by the appearance of an originally weak MP in-plane CH bending (β CH ) mode at 1170 cm –1 (Figure S8), possibly due to enhanced polarizability when phenoxide is connected to the bulky transition metal . The sandwiched MP structure is expected to create molecular scale cavities at the Ag@ZIF interface, which are essential to generate a pseudo high-pressure microenvironment for the activation of gas-based reaction at ambient conditions …”

Section: Resultsmentioning

confidence: 99%

Applying a Nanoparticle@MOF Interface To Activate an Unconventional Regioselectivity of an Inert Reaction at Ambient Conditions

Lee

Koh

et al. 2020

J. Am. Chem. Soc.

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Here we design an interface between a metal nanoparticle (NP) and a metal–organic framework (MOF) to activate an inert CO2 carboxylation reaction and in situ monitor its unconventional regioselectivity at the molecular level. Using a Kolbe–Schmitt reaction as model, our strategy exploits the NP@MOF interface to create a pseudo high-pressure CO2 microenvironment over the phenolic substrate to drive its direct C–H carboxylation at ambient conditions. Conversely, Kolbe–Schmitt reactions usually demand high reaction temperature (>125 °C) and pressure (>80 atm). Notably, we observe an unprecedented CO2 meta-carboxylation of an arene that was previously deemed impossible in traditional Kolbe–Schmitt reactions. While the phenolic substrate in this study is fixed at the NP@MOF interface to facilitate spectroscopic investigations, free reactants could be activated the same way by the local pressurized CO2 microenvironment. These valuable insights create enormous opportunities in diverse applications including synthetic chemistry, gas valorization, and greenhouse gas remediation.

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“…To prepare that kind of SERS substrate, many approaches are taken under consideration, including the use of polymer nanofabric [35,36], cellulose [37,38], or flexible piezoelectric-modulated layer [39] decorated by silver or gold nanoparticles or nanowires. Few of these substrates can find its application in food industry, especially for pesticide detection [37,38,40], and others in explosive materials detection [41].…”

Section: Advantages Disadvantagesmentioning

confidence: 99%

An Overview of Anodic Oxides Derived Advanced Nanocomposites Substrate for Surface Enhance Raman Spectroscopy

Michalska-Domańska¹

2020

Assorted Dimensional Reconfigurable Materials

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Surface-enhanced Raman spectroscopy (SERS) is an analytical technique, which allows to identify traces of chemical or biological substances in many field, like pharmaceutical and food industries, homeland security, nanosensors, or environmental protection. The analytes are identified based on their vibrational spectra, unique for a given compound. The advantage of SERS is effective qualitative analysis of trace amounts of analyte, but the disadvantages are stability of substrate and repeatability of measurements. The challenge is to improve SERS substrates to minimize these drawbacks. Nowadays high-precision electron beam lithography or focused ion beam is used in SERS substrate fabrication, which is impractical for large-scale production. In recent years, researchers' attention has focused on porous anodic oxides, with inexpensive and scalable production method, as potential materials for SERS substrates. This chapter will discuss the progress of anodic oxides used as a SERS substrate, and the brief description of conventional SERS substrate fabrication methods will be presented.

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Large-scale preparation of flexible and reusable surface-enhanced Raman scattering platform based on electrospinning AgNPs/PCL nanofiber membrane

Abstract: A flexible and reusable SERS substrates were prepared by electrospinning Ag nanoparticles in reversed micelle into poly(ε-caprolactone) nanofibers.

Cited by 17 publications

References 24 publications

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

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

Applying a Nanoparticle@MOF Interface To Activate an Unconventional Regioselectivity of an Inert Reaction at Ambient Conditions

An Overview of Anodic Oxides Derived Advanced Nanocomposites Substrate for Surface Enhance Raman Spectroscopy

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