A gold nanoparticle doped flexible substrate for microplastics SERS detection

Xu, Dewen; Su, Wei; Lu, Hanwen; Luo, Yinlong; Yi, Tianan; Wu, Jian; Wu, Hong; Yin, Cheng; Chen, Bingyan

doi:10.1039/d1cp05870c

Cited by 30 publications

(17 citation statements)

References 35 publications

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“…Surface-enhanced Raman spectroscopy (SERS) is a sensitive analytical technique that can enhance the detection signal of analytes and has a high spatial resolution of up to submicron . To date, a few SERS-based methods have been proposed, − such as the use of Klarite, silver colloids, − and silver-coated gold nanostars inserted into anodic aluminum oxide (AAO) as substrates for analyzing submicroplastics. However, given that the environmental residue level of small-sized plastics is very low (in the range of μg/L), − it is necessary to develop a preconcentration method that is suitable for nanoplastics and meets the detection requirements to proceed with the following analysis.…”

Section: Introductionmentioning

confidence: 99%

Identification of Trace Polystyrene Nanoplastics Down to 50 nm by the Hyphenated Method of Filtration and Surface-Enhanced Raman Spectroscopy Based on Silver Nanowire Membranes

Yang

Zhang

et al. 2022

Environ. Sci. Technol.

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Nanoplastics are emerging pollutants that pose potential threats to the environment and organisms. However, in-depth research on nanoplastics has been hindered by the absence of feasible and reliable analytical methods, particularly for trace nanoplastics. Herein, we propose a hyphenated method involving membrane filtration and surface-enhanced Raman spectroscopy (SERS) to analyze trace nanoplastics in water. In this method, a bifunctional Ag nanowire membrane was employed to enrich nanoplastics and enhance their Raman spectra in situ, which omitted sample transfer and avoided losing smaller nanoplastics. Good retention rates (86.7% for 50 nm and approximately 95.0% for 100–1000 nm) and high sensitivity (down to 10–7 g/L for 50–1000 nm and up to 105 SERS enhancement factor) of standard polystyrene (PS) nanoplastics were achieved using the proposed method. PS nanoplastics with concentrations from 10–1 to 10–7 g/L and sizes ranging from 50 to 1000 nm were successfully detected by Raman mapping. Moreover, PS micro- and nanoplastics in environmental water samples collected from the seafood market were also detected at the μg/L level. Consequently, the proposed method provides more possibilities for analyzing low-concentration nanoplastics in aquatic environments with high enrichment efficiency, minimal sample loss, and high sensitivity.

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Section: Introductionmentioning

confidence: 99%

Identification of Trace Polystyrene Nanoplastics Down to 50 nm by the Hyphenated Method of Filtration and Surface-Enhanced Raman Spectroscopy Based on Silver Nanowire Membranes

Yang

Zhang

et al. 2022

Environ. Sci. Technol.

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“…The characteristic peak at 998 cm −1 belonging to PS can be clearly observed in the twocomponent spectrum, while the peaks at 1610 and 1726 cm −1 were attributed to PET. 42 Similarly, PS and PE were successfully differentiated (Figure 5D). The peaks at 1059, 1125, and 1292 cm −1 were assigned to PE.…”

Section: ■ Results and Discussionmentioning

confidence: 81%

“…To verify the potential of LICA in complex media, we tested the detection of nanoplastics in aquatic environments (Figure A). Tap water contains minerals and traces of bacteria, while lake water is more complex, containing some inorganic salts and dissolved organic substances Figure B,C shows the SERS spectra of nanoplastics at different concentrations in tap water and lake water.…”

Section: Resultsmentioning

confidence: 99%

Liquid Interfacial Coassembly of Plasmonic Arrays and Trace Hydrophobic Nanoplastics in Edible Oils for Robust Identification and Classification by Surface-Enhanced Raman Spectroscopy

Yu,

Qu,

Ding

et al. 2023

J. Agric. Food Chem.

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The ubiquity of micro-/nanoplastics poses a visible threat to the environment, aquatic organisms, and human beings and has become a global concern. Here, we proposed a liquid interface-based strategy using surface-enhanced Raman spectroscopy to coassemble nanoplastics and gold nanoparticles into a dense and homogeneous plasmonic array, thereby enabling the rapid and sensitive detection of trace nanoplastics. In addition, due to the uniqueness of the oil−water immiscible two-phase interface, we achieved ideal results for the detection of nanoplastics in a complex matrix (e.g., aqueous environment and edible oil) with a detection limit of μg/mL. With the aid of the principal component analysis algorithm, the differentiation and identification of multiple nanoplastic components (e.g., polystyrene, polyethylene, and polyethylene terephthalate) in aqueous environments and common hazards (e.g., Bap and Phe) in edible oil were achieved. Therefore, our self-assembled plasmonic arrays are expected to be used for monitoring environmental pollution and food safety.

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“…Semiquantification of nanoplastics achieved by reducing the statistical error between spectra through multiple acquisitions. 112,113 3.3.3. Comparison of Two Types of SERS Substrates.…”

Section: Metal Nanostructure Arrays Sers Substratesmentioning

confidence: 99%

“…Another approach is to switch the objective to 20× and widen the contact area between the laser and the substrate to obtain a more uniform SERS signal even if the nanoparticles are randomly distributed on the substrate. Semiquantification of nanoplastics is achieved by reducing the statistical error between spectra through multiple acquisitions. , …”

Section: Strategies and Advances In Sers Detection Of Nanoplasticsmentioning

confidence: 99%

Strategies and Challenges of Identifying Nanoplastics in Environment by Surface-Enhanced Raman Spectroscopy

Xie

Gong

Liu

et al. 2022

Environ. Sci. Technol.

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Nanoplastics (<1000 nm) have been evidenced to be universal in a variety of environmental media. They pose a potential cytotoxicity and health risk due to their tiny size, which allows them to easily penetrate biological barriers and enter cells. Here, we briefly review the various prevalent analytical techniques or tools for identifying nanoplastics, and further move to focus on their advantages and disadvantages. Surface-enhanced Raman spectroscopy (SERS) has been implemented for the identification of individual nanoparticles because of its high sensitivity to molecules and ease of rapid characterization. Therefore, we introduce the SERS technique in the following aspects, (1) principles of SERS; (2) strategies and advances in SERS detection of nanoplastics; and (3) applying SERS to real environmental samples. We put our effort into the summarization of efficient SERS substrates that essentially enable the better detection of nanoplastics, and extend to discuss how the reported nanoplastics pretreatment methodologies can bring SERS analysis to practical applications. A further step moving forward is to investigate the problems and challenges of currently applied SERS detection methods and to look at future research needs in nanoplastics detection employing SERS analysis.

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A gold nanoparticle doped flexible substrate for microplastics SERS detection

Abstract: Due to abuse of plastic products, the decomposed microplastics (MPs) are widely spread in aquatic ecosystems, and will cause irreparable harm to the human body through the food chain. Traditional...

Cited by 30 publications

References 35 publications

Identification of Trace Polystyrene Nanoplastics Down to 50 nm by the Hyphenated Method of Filtration and Surface-Enhanced Raman Spectroscopy Based on Silver Nanowire Membranes

Identification of Trace Polystyrene Nanoplastics Down to 50 nm by the Hyphenated Method of Filtration and Surface-Enhanced Raman Spectroscopy Based on Silver Nanowire Membranes

Liquid Interfacial Coassembly of Plasmonic Arrays and Trace Hydrophobic Nanoplastics in Edible Oils for Robust Identification and Classification by Surface-Enhanced Raman Spectroscopy

Strategies and Challenges of Identifying Nanoplastics in Environment by Surface-Enhanced Raman Spectroscopy

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