Nanowell-enhanced Raman spectroscopy enables the visualization and quantification of nanoplastics in the environment

Zhang, Wei; Chang, Lin; Jiang, Shan; Luo, Jie; Zhang, Jianfa; Liu, Xiaohong; Lee, Chong Yew

doi:10.1039/d1en00945a

Cited by 42 publications

(44 citation statements)

References 44 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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“…Interestingly, a single PS MNP particle was directly visualized on this substrate, and the limited detection of PS concentrations in bottled water, tap water, and river water was estimated at 5 ppm. This novel 3D template provides a method for ultra-sensitive detection of MNPs by means of SERS spectra [ 99 ]. As shown in Fig.…”

Section: Mnp Detection By Raman Spectroscopymentioning

confidence: 99%

“…6 A Schematic diagram of Klarite substrates-induced SERS detection of < 1 μm MNPs in the environmental samples [ 95 ]. B Schematic diagram of the nano-well-enhanced SERS visualization and quantification of MNPs in the environmental samples [ 99 ]. C Schematic diagram of rapid and sensitive detection of trace concentrated MNP particles based on Au-nanoparticle-decorated sponge by means of SERS spectra [ 96 ].…”

Section: Mnp Detection By Raman Spectroscopymentioning

confidence: 99%

“…Furthermore, due to their excellent enhancement of resonance Raman scattering spectroscopy, many researchers have been interested in developing the plasmonic nanomaterials-based SERS sensing method. In particular, also successfully developed for MNP detection are the plasmonic nanostructure-based SERS technique [ 88 – 91 ] with supporting silver nanoparticles (AgNPs) [ 92 ], gold nanoparticle (AuNP) substrates [ 93 ], gold nanostars [ 94 ], commercialized Klarite substrates [ 95 ], AuNP-decorated sponges [ 96 ], silver-coated gold nanostars [ 97 ], a single gold nanopore fabricated at the tip of a glass nanopipette [ 98 ], SiO 2 self-assembly sputtered with Ag films [ 99 ], Ag nanowire arrays on regenerated cellulose (RC) films [ 100 ], and microfluidic chips [ 101 ].…”

Section: Introductionmentioning

confidence: 99%

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Advanced microplastic monitoring using Raman spectroscopy with a combination of nanostructure-based substrates

Kim

Lee

et al. 2022

J Nanostruct Chem

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Micro(nano)plastic (MNP) pollutants have not only impacted human health directly, but are also associated with numerous chemical contaminants that increase toxicity in the natural environment. Most recent research about increasing plastic pollutants in natural environments have focused on the toxic effects of MNPs in water, the atmosphere, and soil. The methodologies of MNP identification have been extensively developed for actual applications, but they still require further study, including on-site detection. This review article provides a comprehensive update on the facile detection of MNPs by Raman spectroscopy, which aims at early diagnosis of potential risks and human health impacts. In particular, Raman imaging and nanostructure-enhanced Raman scattering have emerged as effective analytical technologies for identifying MNPs in an environment. Here, the authors give an update on the latest advances in plasmonic nanostructured materials-assisted SERS substrates utilized for the detection of MNP particles present in environmental samples. Moreover, this work describes different plasmonic materials—including pure noble metal nanostructured materials and hybrid nanomaterials—that have been used to fabricate and develop SERS platforms to obtain the identifying MNP particles at low concentrations. Plasmonic nanostructure-enhanced materials consisting of pure noble metals and hybrid nanomaterials can significantly enhance the surface-enhanced Raman scattering (SERS) spectra signals of pollutant analytes due to their localized hot spots. This concise topical review also provides updates on recent developments and trends in MNP detection by means of SERS using a variety of unique materials, along with three-dimensional (3D) SERS substrates, nanopipettes, and microfluidic chips. A novel material-assisted spectral Raman technique and its effective application are also introduced for selective monitoring and trace detection of MNPs in indoor and outdoor environments. Graphical abstract

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“…As an analytical technique, surface-enhanced Raman spectroscopy (SERS) is a ngerprint scattering spectroscopy that enables rapid and non-destructive detection of molecules. [3][4][5][6] It has been widely used in the eld of environmental monitoring and is particularly suitable for the on-site detection of environmental pollutants as the detection limits can reach as low as the single-molecule level, depending on the performance of the substrate, and less pretreatment of the sample is needed. [7][8][9][10] Although SERS technology has been developed for decades, there are still specic problems and challenges in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Inter-coffee-ring effects boost rapid and highly reliable SERS detection of TPhT on a light-confining structure

et al. 2022

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Nanowell-enhanced Raman spectroscopy enables the visualization and quantification of nanoplastics in the environment

Abstract: Nanoplastics are persistent pollutants that can cause severe toxicity to mammals. To date, no technology could simultaneously capture nanoplastic chemical and morphological information while conducting quantitative detection. Surface-enhanced Raman spectroscopy...

Cited by 42 publications

References 44 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

Advanced microplastic monitoring using Raman spectroscopy with a combination of nanostructure-based substrates

Inter-coffee-ring effects boost rapid and highly reliable SERS detection of TPhT on a light-confining structure

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