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Nanomaterials
Volume 11
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10.3390/nano11051149
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Article

Detection of Sub-Micro- and Nanoplastic Particles on Gold Nanoparticle-Based Substrates through Surface-Enhanced Raman Scattering (SERS) Spectroscopy

by
Jessica Caldwell
1,
Patricia Taladriz-Blanco
1,*,
Barbara Rothen-Rutishauser
1 and
Alke Petri-Fink
1,2,*
1
Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
2
Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
*
Authors to whom correspondence should be addressed.
Nanomaterials 2021, 11(5), 1149; https://doi.org/10.3390/nano11051149
Submission received: 30 March 2021 / Revised: 20 April 2021 / Accepted: 23 April 2021 / Published: 28 April 2021
(This article belongs to the Special Issue Metallic Nanostructured Materials for Environmental and Biosensing Application)
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Abstract

Small plastic particles such as micro- (<5 mm), sub-micro- (1 µm–100 nm) and nanoplastics (<100 nm) are known to be ubiquitous within our surrounding environment. However, to date relatively few methods exist for the reliable detection of nanoplastic particles in relevant sample matrices such as foods or environmental samples. This lack of relevant data is likely a result of key limitations (e.g., resolution and/or scattering efficiency) for common analytical techniques such as Fourier transform infrared or Raman spectroscopy. This study aims to address this knowledge gap in the field through the creation of surface-enhanced Raman scattering spectroscopy substrates utilizing spherical gold nanoparticles with 14 nm and 46 nm diameters to improve the scattering signal obtained during Raman spectroscopy measurements. The substrates are then used to analyze polystyrene particles with sizes of 161 nm or 33 nm and poly(ethylene terephthalate) particles with an average size of 62 nm. Through this technique, plastic particles could be detected at concentrations as low as 10 µg/mL, and analytical enhancement factors of up to 446 were achieved.
Keywords: nanoplastic; sub-microplastic; Raman; SERS; nanoparticles nanoplastic; sub-microplastic; Raman; SERS; nanoparticles

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MDPI and ACS Style

Caldwell, J.; Taladriz-Blanco, P.; Rothen-Rutishauser, B.; Petri-Fink, A. Detection of Sub-Micro- and Nanoplastic Particles on Gold Nanoparticle-Based Substrates through Surface-Enhanced Raman Scattering (SERS) Spectroscopy. Nanomaterials 2021, 11, 1149. https://doi.org/10.3390/nano11051149

AMA Style

Caldwell J, Taladriz-Blanco P, Rothen-Rutishauser B, Petri-Fink A. Detection of Sub-Micro- and Nanoplastic Particles on Gold Nanoparticle-Based Substrates through Surface-Enhanced Raman Scattering (SERS) Spectroscopy. Nanomaterials. 2021; 11(5):1149. https://doi.org/10.3390/nano11051149

Chicago/Turabian Style

Caldwell, Jessica, Patricia Taladriz-Blanco, Barbara Rothen-Rutishauser, and Alke Petri-Fink. 2021. "Detection of Sub-Micro- and Nanoplastic Particles on Gold Nanoparticle-Based Substrates through Surface-Enhanced Raman Scattering (SERS) Spectroscopy" Nanomaterials 11, no. 5: 1149. https://doi.org/10.3390/nano11051149

APA Style

Caldwell, J., Taladriz-Blanco, P., Rothen-Rutishauser, B., & Petri-Fink, A. (2021). Detection of Sub-Micro- and Nanoplastic Particles on Gold Nanoparticle-Based Substrates through Surface-Enhanced Raman Scattering (SERS) Spectroscopy. Nanomaterials, 11(5), 1149. https://doi.org/10.3390/nano11051149

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