Sub-10 nm nanoparticle detection using multi-technique-based micro-raman spectroscopy
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2023
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Polymers
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Microplastic pollution is a growing public concern as these particles are ubiquitous in
various environments and can fragment into smaller nanoplastics. Another environmental concern
arises from widely used engineered nanoparticles. Despite the increasing abundance of these nanosized pollutants and the possibility of interactions with organisms at the sub cellular level, with
many risks still being unknown, there are only a few publications on this topic due to the lack of
reliable techniques for nanoparticle characterization. We propose a multi-technique approach for the
characterization of nanoparticles down to the 10 nm level using standard micro-Raman spectroscopy
combined with standard atomic force microscopy. We successfully obtained single-particle spectra
from 25 nm sized polystyrene and 9 nm sized TiO2 nanoparticles with corresponding mass limits of
detection of 8.6 ag (attogram) and 1.6 ag, respectively, thus demonstrating the possibility of achieving
an unambiguous Raman signal from a single, small nanoparticle with a resolution comparable to
more complex and time-consuming technologies such as Tip-Enhanced Raman Spectroscopy and
Photo-Induced Force Microscopy
Como referenciar
BERECZKI, ALLAN; DIPOLD, JESSICA; FREITAS, ANDERSON Z.; WETTER, NIKLAUS U. Sub-10 nm nanoparticle detection using multi-technique-based micro-raman spectroscopy. Polymers, v. 15, n. 24, p. 1-17, 2023. DOI: 10.3390/polym15244644. Disponível em: http://repositorio.ipen.br/handle/123456789/34438. Acesso em: 12 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.