Surface-enhanced Raman spectroscopy for the detection of microplastics

Mikac, Lara; Rigó, István; Himics, L.; Tolić, A.; Ivanda, Mile; Vereš, M.

doi:10.1016/j.apsusc.2022.155239

Cited by 61 publications

(31 citation statements)

References 46 publications

(52 reference statements)

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“…It can be seen from Figure e that the strongest characteristic peak at 999 cm –1 originates from the C–C ring breathing mode of PS, and the 619, 1031, 1447, and 1600 cm –1 are due to the ring deformation mode, the CH– in-plane deformation band, ν 19b or δ(CH 2 ), and the C–C stretching vibrations, respectively. , Figure g shows the SERS spectrum of PE, in which the intensive peaks are 1061 cm –1 (the anti-symmetric C–C stretching mode), 1127 cm –1 (symmetric C–C stretching mode), and 1295 cm –1 (CH 2 twisting mode). Three distinct peaks around 1440 cm –1 are assigned to the CH 2 bending modes, while the peaks at 2850 and 2882 cm –1 are assigned to the symmetric and asymmetric CH 2 stretching modes, respectively Figure f,h shows the PIERS and SERS spectra of the PS and PE captured on the substrate, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Three distinct peaks around 1440 cm −1 are assigned to the CH 2 bending modes, while the peaks at 2850 and 2882 cm −1 are assigned to the symmetric and asymmetric CH 2 stretching modes, respectively. 38 Figure 5f,h shows the PIERS and SERS spectra of the PS and PE captured on the substrate, respectively. It can be seen that the PIERS technology has achieved an order of magnitude enhancement for PS and PE detection compared with SERS, and a detection limit of 25 μg/mL has been realized, confirming the successful analysis of microplastics by PIERS.…”

Section: Piers Em Andmentioning

confidence: 99%

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Biomimetic Ag/ZnO@PDMS Hybrid Nanorod Array-Mediated Photo-induced Enhanced Raman Spectroscopy Sensor for Quantitative and Visualized Analysis of Microplastics

Zhu

Han

Feng

et al. 2023

ACS Appl. Mater. Interfaces

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Microplastics are persistent pollutants that accumulate in the environment and can cause serious toxicity to mammals. At present, few technologies are able to quantitatively detect chemicals and provide morphological information simultaneously. Herein, we developed a dragonfly-wing-mimicking ZnO nanorod array decorated with AgNPs on polydimethylsiloxane (PDMS) as a surface-enhanced Raman spectroscopy (SERS) and photo-induced enhanced Raman spectroscopy (PIERS) substrate for trace analysis of microplastics. The Ag/ZnO@PDMS hybrid nanorod array endows the sensor with high sensitivity and signal repeatability (RSD ∼ 5.89%), ensuring the reliable quantitative analysis of microplastics. Importantly, when the noble metal−semiconductor substrate was preradiated with ultraviolet light, a surprising PIERS was attained, achieving an additional enhancement of 11.3-fold higher than the normal SERS signal. By combining the PIERS technology with the "coffee ring effect", the sensor successfully discerned microplastics of polyethylene (PE) and polystyrene (PS) at a trace level of 25 μg/mL even with a portable Raman device. It was capable of identifying PS microspheres in contaminated tap water, lake water, river water, and seawater with detection limits of 25, 28, 35, and 60 μg/mL, respectively. The recovery rates of PS microspheres in four water environments ranged from 94.8 to 102.4%, with the RSD ranging from 2.40 to 6.81%. Moreover, quantitative and visualized detection of microplastics was readily realized by our sensor. This portable PIERS sensor represents a significant step toward the generalizability and practicality of quantitative and visual sensing technology.

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Section: Resultsmentioning

confidence: 99%

Section: Piers Em Andmentioning

confidence: 99%

Biomimetic Ag/ZnO@PDMS Hybrid Nanorod Array-Mediated Photo-induced Enhanced Raman Spectroscopy Sensor for Quantitative and Visualized Analysis of Microplastics

Zhu

Han

Feng

et al. 2023

ACS Appl. Mater. Interfaces

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“…Figure 1a shows the UV-VIS absorbance peak of the AuNP colloidal solution, exhibiting a plasmon resonance peak at approximately 520 nm, and thus efficient excitation within the range of 488 nm to 532 nm would result in maximum enhancement during SERS 14 . However, because subsequent formation of gold nanoparticle aggregates leads to a (red) shift of the plasmon resonance peak toward longer wavelengths, an excitation source of 785 nm was used for SERS measurements of the aggregates.…”

Section: Sers Measurementsmentioning

confidence: 99%

“…Those measurements, seen in Figure 1b, show that both peaks were clearly visible for each concentration of PS solutions, ranging from 0.001 -0.1 mg/ml. It is known that the factors that most significantly impact enhancement are the spatial separation of the analyte (in this case PS beads) from the substrate (here AuNP aggregates), and its uniform distribution and aggregation 14 . Furthermore, research indicates that the improvement of SERS enhancement is largely dependent on various factors such as the size and concentration of AuNPs [11].…”

Section: Sers Measurementsmentioning

confidence: 99%

Salt-induced aggregation of gold nanoparticles for sensitive SERS-based detection of nanoplastics in water

Bibi

Pant

Tate

et al. 2023

Quantum Sensing and Nano Electronics and Photonics XIX

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The presence of micro and nano plastics in the environment and their impact on the various life forms within it are of principle concern around the globe. However, whilst a considerable amount of work has been done on the detection of microplastics, many challenges remain in the development of analytical techniques for nanoplastics due to their inherent ultra-small size and ubiquitous shapes. Here, a simple technique is reported based on surface enhanced Raman spectroscopy (SERS) and salt (NaCl) induced aggregation of gold nanoparticles that has been used to detect 100 nm diameter polystyrene (PS) beads. The gold nanoparticles (AuNPs) were synthesized and stabilized by negatively charged sodium citrate. When the PS beads present in a water sample were introduced into the solution of colloidal AuNPs, they interact to each other via hydrophobic interactions and other weak forces (i.e. hydrogen, ionic, and Van der waals forces). Upon an addition of NaCl, the negatively charged ions around the AuNPs are shielded and disturbed, resulting in their aggregation around the PS beads. As a consequence, strong SERS signal enhancement produced by the aggregated AuNPs was observed, and also demonstrated in numerical modelling. Concentrations of 100 nm PS beads as low as 1 part per million (ppm) were measured, and to the best of the author's knowledge, this is the lowest concentration detected for nanoplastics of that size or smaller by such a simple technique that has been reported.

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“…The dramatic increase in plastic production and widespread use in recent decades have led to a global accumulation of plastic debris, causing increasing environmental problems . Under the action of photo-oxidation, high temperature, biodegradation, and mechanical abrasion, plastic debris is broken down into microplastics (1 μm–5 mm) and nanoplastics (<1 μm). , Extensive exposure to micro-/nanoplastics in freshwater, seawater, soil, food, and the atmosphere poses serious harm to ecology, aquatic organisms, and human beings. The harmful effects of plastic pollution are of increasing concern due to their persistent toxicity.…”

Section: Introductionmentioning

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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Surface-enhanced Raman spectroscopy for the detection of microplastics

Cited by 61 publications

References 46 publications

Biomimetic Ag/ZnO@PDMS Hybrid Nanorod Array-Mediated Photo-induced Enhanced Raman Spectroscopy Sensor for Quantitative and Visualized Analysis of Microplastics

Biomimetic Ag/ZnO@PDMS Hybrid Nanorod Array-Mediated Photo-induced Enhanced Raman Spectroscopy Sensor for Quantitative and Visualized Analysis of Microplastics

Salt-induced aggregation of gold nanoparticles for sensitive SERS-based detection of nanoplastics in water

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

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