Surface-modified paper-based SERS substrates for direct-droplet quantitative determination of trace substances

Li, Xian; You, Ruiyun; Lu, Dechan; Wu, Changji; Feng, Shouhua; Lu, Yue

doi:10.1007/s10570-019-02855-6

Cited by 17 publications

(14 citation statements)

References 44 publications

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“…Furthermore, to improve the SERS substrate efficiency and to avoid unwanted spreading of NPs, hydrophobic modification of paper has been exploited before the printing of NPs 91 . Kim et al 92 . used a silicon rubber mask (3 mm diameter and 1 mm thickness) to construct SERS sensor arrays.…”

Section: Paper-based Sers Substratesmentioning

confidence: 99%

Flexible SERS substrates for hazardous materials detection: recent advances

Moram¹,

Soma²

2021

OEA

163

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This article reviews the most recent advances in the development of flexible substrates used as surface-enhanced Raman scattering (SERS) platforms for detecting several hazardous materials (e.g., explosives, pesticides, drugs, and dyes). Different flexible platforms such as papers/filter papers, fabrics, polymer nanofibers, and cellulose fibers have been investigated over the last few years and their SERS efficacies have been evaluated. We start with an introduction of the importance of hazardous materials trace detection followed by a summary of different SERS methodologies with particular attention on flexible substrates and their advantages over the nanostructures and nanoparticle-based solid/hybrid substrates. The potential of flexible SERS substrates, in conjunction with a simple portable Raman spectrometer, is the power to enable practical/on-field/point of interest applications primarily because of their low-cost and easy sampling.

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Section: Paper-based Sers Substratesmentioning

confidence: 99%

Flexible SERS substrates for hazardous materials detection: recent advances

Moram¹,

Soma²

2021

OEA

163

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“…A possibility of minimizing this effect involves the use of hydrophobic paper-based substrates. 14,16,21,22 A droplet of an aqueous analyte solution deposited on a hydrophobic substrate does not wet the surface, which allows the concentration of the analyte in a small area of the substrate after solvent evaporation. This analyte concentration effect has been associated with hydrophobic substrates exhibiting higher SERS sensitivity.…”

Section: Introductionmentioning

confidence: 99%

“…22,25 However, most of the examples found in the literature for producing hydrophobic paper substrates involve lengthy processes comprising several sequential steps, which normally include, as distinct steps, the paper coating with hydrophobic agents and the loading of metal nanoparticles. 16,21,22 It would be convenient to have a simpler and versatile substrate manufacturing method, adjustable to different analytical contexts.…”

Section: Introductionmentioning

confidence: 99%

Inkjet Printing of Ag and Polystyrene Nanoparticle Emulsions for the One-Step Fabrication of Hydrophobic Paper-Based Surface-Enhanced Raman Scattering Substrates

Martins

Fateixa

Fernandes

et al. 2021

ACS Appl. Nano Mater.

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Hydrophobic substrates for surface-enhanced Raman scattering (SERS) of adsorbate species are of great interest in chemical analysis because they can concentrate the analyte molecules in a small area of the surface, thereby improving the SERS sensitivity. Here, we propose a general strategy to fabricate hydrophobic paper-based substrates for SERS applications. The paper substrates have been manufactured by inkjet printing of aqueous emulsions containing Ag and polystyrene (PS) colloidal nanoparticles. In a first stage, the SERS performance of the substrates was optimized by varying the relative amounts of polymer/metal colloidal nanoparticles, the number of printing layers, and the degree of hydrophobicity of the substrates, using crystal violet as a molecular probe, which is well known for its strong SERS activity. In these conditions, the strongest surface Raman enhancement was observed for the highest water contact angle (146°) achieved. The selected Ag/PS-coated paper substrates showed wide applicability for several analytes, but in this study, a detailed analysis is provided for the pesticide thiram as a proof of concept. Several samples spiked with thiram have been analyzed by SERS, giving a detection limit of 0.024 ppm thiram in mineral water and apple juice, while in apple peel, the detection limit achieved for the same pesticide was 600 ng/cm2. We suggest that this one-step fabrication method produces a hydrophobic coating whose nanoscale features improve the SERS performance of the paper substrates.

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“…SERS substrates may be, however, also produced on other nanostructured inorganic films, for example on ZrO 2 [ 10 ]. Moreover, in addition to SERS materials formed on inorganic substrates, there are also widely used so called paper-based SERS substrates that are formed on cellulose [ 11 , 12 , 13 ]. This type of SERS substrate is also not described in this work.…”

Section: Non-metallic Nanostructured Thin Films Covered By Plasmonmentioning

confidence: 99%

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

2020

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The efficiency of the generation of Raman spectra by molecules adsorbed on some substrates (or placed at a very close distance to some substrates) may be many orders of magnitude larger than the efficiency of the generation of Raman spectra by molecules that are not adsorbed. This effect is called surface-enhanced Raman scattering (SERS). In the first SERS experiments, nanostructured plasmonic metals have been used as SERS-active materials. Later, other types of SERS-active materials have also been developed. In this review article, various SERS substrates formed on nanostructured non-metallic materials, including non-metallic nanostructured thin films or non-metallic nanoparticles covered by plasmonic metals and SERS-active nanomaterials that do not contain plasmonic metals, are described. Significant advances for many important applications of SERS spectroscopy of substrates based on nanostructured non-metallic materials allow us to predict a large increase in the significance of such nanomaterials in the near future. Some future perspectives on the application of SERS substrates utilizing nanostructured non-metallic materials are also presented.

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Surface-modified paper-based SERS substrates for direct-droplet quantitative determination of trace substances

Cited by 17 publications

References 44 publications

Flexible SERS substrates for hazardous materials detection: recent advances

Flexible SERS substrates for hazardous materials detection: recent advances

Inkjet Printing of Ag and Polystyrene Nanoparticle Emulsions for the One-Step Fabrication of Hydrophobic Paper-Based Surface-Enhanced Raman Scattering Substrates

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

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