Submicron- and nanoplastic detection at low micro- to nanogram concentrations using gold nanostar-based surface-enhanced Raman scattering (SERS) substrates

Caldwell, Jessica; Taladriz-Blanco, Patricia; Rodriguez-Lorenzo, Laura; Rothen-Rutishauser, Barbara; Petri-Fink, Alke

doi:10.1039/d3en00401e

Environ. Sci.: Nano

2024

DOI: 10.1039/d3en00401e

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Submicron- and nanoplastic detection at low micro- to nanogram concentrations using gold nanostar-based surface-enhanced Raman scattering (SERS) substrates

Jessica Caldwell,

Patricia Taladriz-Blanco,

Laura Rodriguez-Lorenzo

et al.

Abstract: This study focuses on using gold nanostar-based SERS substrates to detect 4 different types of plastic (6 particle sizes within the submicron- and nano-regimes). Substrates could be used to detect concentrations of plastics as low as 625 ng mL−1.

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Cited by 3 publications

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Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe₂O₄@Ag

Zhao,

Sun,

Gao

et al. 2024

Adv Funct Materials

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Rapid and accurate detection of nitrite in the aqueous environment is extremely important for ecological safety and human health. In this paper, the Raman detection of nitrite by a NiFe2O4@Ag sensor in water is enhanced by an extra magnetic field collaborated with surface plasma. Most importantly, it is demonstrated that the magnetic field enhances the Raman peak intensity through not only the effect of magnetic aggregation but also the magnetic field‐induced dielectric polarization effect. In this way, the NO2− can be detected in a wide linear range from 10−8 to 10−3 mol L−1, and the limit of detection (LOD) can reach as low as 1.25 × 10−9 mol L−1, which is 5.69 times lower than that in the absence of an external magnetic field. Similarly, the sensitivity under the magnetic field is 2.65 times that without the magnetic field. In addition, the sensor also shows superior detection ability to NO2− in real samples. Given the excellent capability of the magnetic field‐enhanced Raman spectra, the reported strategy offers new thoughts on how to enhance the detection ability by an external magnetic field and show the great application potential in real water bodies.

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Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe₂O₄@Ag

Zhao,

Sun,

Gao

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

Cumulative Distribution Function and Spatially Resolved Surface-Enhanced Raman Spectroscopy for the Quantitative Analysis of Emtricitabine

Hrncirova,

Butler,

Dutta

et al. 2024

Applied Spectroscopy Practica

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Surface-enhanced Raman spectroscopy (SERS) has exceptional analytical sensitivity and selectivity. However, SERS irreproducibility presents an obstacle when using it for precise quantitative measurements. In this study, colloidal nanoparticles evaporated to dryness are used as a SERS active surface for the detection of the HIV drug emtricitabine (FTC; trade name Emtriva). Despite the irreproducibility of the SERS resulting from the stochastic process of evaporation, using a SERS scanning instrument, the SERS enhancement factors of spatially resolved spectra have a well-defined distribution of signals for a given analyte concentration. This distribution follows a power law function ranging from weak (very abundant signals) to very strong (sparse signals). By definition, a power law distribution cannot have a true mean. Hence a cumulative distribution function was used to model the concentration of emtricitabine, and calibration curves were constructed. For stochastically generated quantitative data sets, the precision of this approach is superior to methods utilizing signal averaging and improves analytical sensitivity.

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Exploring Plasmonic Standalone Surface-Enhanced Raman Scattering Nanoprobes for Multifaceted Applications in Biomedical, Food, and Environmental Fields

Rojas Martínez,

Lee,

2024

Nanomaterials

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Surface-enhanced Raman scattering (SERS) is an innovative spectroscopic technique that amplifies the Raman signals of molecules adsorbed on rough metal surfaces, making it pivotal for single-molecule detection in complex biological and environmental matrices. This review aims to elucidate the design strategies and recent advancements in the application of standalone SERS nanoprobes, with a special focus on quantifiable SERS tags. We conducted a comprehensive analysis of the recent literature, focusing on the development of SERS nanoprobes that employ novel nanostructuring techniques to enhance signal reliability and quantification. Standalone SERS nanoprobes exhibit significant enhancements in sensitivity and specificity due to optimized hot spot generation and improved reporter molecule interactions. Recent innovations include the development of nanogap and core–satellite structures that enhance electromagnetic fields, which are crucial for SERS applications. Standalone SERS nanoprobes, particularly those utilizing indirect detection mechanisms, represent a significant advancement in the field. They hold potential for wide-ranging applications, from disease diagnostics to environmental monitoring, owing to their enhanced sensitivity and ability to operate under complex sample conditions.

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Submicron- and nanoplastic detection at low micro- to nanogram concentrations using gold nanostar-based surface-enhanced Raman scattering (SERS) substrates

Abstract: This study focuses on using gold nanostar-based SERS substrates to detect 4 different types of plastic (6 particle sizes within the submicron- and nano-regimes). Substrates could be used to detect concentrations of plastics as low as 625 ng mL−1.

Cited by 3 publications

References 49 publications

Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe₂O₄@Ag

Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe₂O₄@Ag

Cumulative Distribution Function and Spatially Resolved Surface-Enhanced Raman Spectroscopy for the Quantitative Analysis of Emtricitabine

Exploring Plasmonic Standalone Surface-Enhanced Raman Scattering Nanoprobes for Multifaceted Applications in Biomedical, Food, and Environmental Fields

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Submicron- and nanoplastic detection at low micro- to nanogram concentrations using gold nanostar-based surface-enhanced Raman scattering (SERS) substrates

Abstract: This study focuses on using gold nanostar-based SERS substrates to detect 4 different types of plastic (6 particle sizes within the submicron- and nano-regimes). Substrates could be used to detect concentrations of plastics as low as 625 ng mL−1.

Cited by 3 publications

References 49 publications

Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe2O4@Ag

Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe2O4@Ag

Cumulative Distribution Function and Spatially Resolved Surface-Enhanced Raman Spectroscopy for the Quantitative Analysis of Emtricitabine

Exploring Plasmonic Standalone Surface-Enhanced Raman Scattering Nanoprobes for Multifaceted Applications in Biomedical, Food, and Environmental Fields

Contact Info

Product

Resources

About

Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe₂O₄@Ag

Magnetic Field Induced Dielectric Polarization to Enhance Raman Detection of Nitrite by NiFe₂O₄@Ag