RT Journal Article
T1 Size-dependent synergetic seeding effects in the inspection of airborne dry nanoaerosols by LIBS.
A1 Purohit, Pablo
A1 Fortes-Román, Francisco Javier
A1 Malegiannaki, I.
A1 Jaime-Fernández, Lourdes
A1 Laserna-Vázquez, José Javier
K1 Espectroscopía de plasma inducido por láser
K1 Nanoestructuras
K1 Aerosoles
AB In the present paper, confined dry Cu nanoaerosols of controlled particle size are inspected under a time-resolved LIBS scheme to explore the effect of laser-particulate matter interaction upon the detection capability of airborne nanoparticulate material. Optically catapulted streams probed showed linear intensity vs mass correlation and similar signal stability which is linked to the seeding effect caused by smaller particles yielding hotter, albeit shorter plasmas. Seeding effect is demonstrated by hyperspectral time-resolved aerosol inspection, which exposes both, the interaction between multiple plasma nuclei and the discrete nature of the laser-particle interaction. Observed population/exhaustion cycles at the focal volume of the inspection laser explained the uncertainty values characteristic of LIBS inspection of aerosols. A thorough inspection of the emission in time evidenced a significantly different evolution of the intensity profile for commonly monitored Cu lines owed not only to the nature of the monitored transit and pulse energy, but also to particle size. These results suggest that the experimental settings for quantitative ultrafine aerosol inspection need to be tuned according to the target particle size and the particle density of the aerosol as seeding effects facilitates signal saturation, therefore this effect simultaneously contributes to and detracts from the analytical performance of LIBS on nanometric aerosols.
PB Elsevier
YR 2021
FD 2021-11-18
LK https://hdl.handle.net/10630/29778
UL https://hdl.handle.net/10630/29778
LA eng
NO Purohit, P., Fortes, F. J., Malegiannaki, I., Jaime-Fernández, L. & Laserna, J. J. Size-dependent synergetic seeding effects in the inspection of airborne dry nanoaerosols by LIBS. Talanta 239, 123067 (2022).
NO Research funded by the Spanish Ministerio de Economia y Competitividad under Projects CTQ2017–82137P and CTQ2014–56058P. Pablo Purohit would also like to acknowledge the Junta de Andalucia for his contract under the program “Garantía Juvenil”.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 13 abr 2026