RT Journal Article
T1 Sub-femtogram simultaneous elemental detection in multicomponent nanomatrices using laser-induced plasma emission spectroscopy within atmospheric pressure optical traps.
A1 Purohit, Pablo
A1 Fortes-Román, Francisco Javier
A1 Laserna-Vázquez, José Javier
K1 Espectroscopía de plasma inducido por láser
K1 Nanopartículas
AB Simultaneous detection of multiple constituents in the characterization of state-of-the-art nanomaterials is an elusive topic to a majority of the analytical techniques covering the field of nanotechnology. Optical catapulting (OC) and optical trapping (OT) have recently been combined with laser-induced breakdown spectroscopy (LIBS) to provide single nanoparticle resolution and attogram detection power. In the present work, the multielemental capabilities of this approach are demonstrated by subjecting two different types of nanometric ferrite particles to LIBS analysis. Up to three metallic elements in attogram quantities are consistently detected within single laser events. Individual excitation efficiency for each species is quantified from particle spectra showing an exponential correlation between photon production and the energy of the upper level of the monitored atomic line. Moreover, a new sampling strategy based in skimmer-like 3D printed cones which allows for thin dry nanoparticle aerosols to be formed via optical catapulting is introduced. Enhanced sampling resulted in an increase of the sampling throughput by facilitating stable atmospheric-pressure optical trapping of individual particles and spectroscopic chemical characterization within a short time frame
PB American Chemical Society
YR 2019
FD 2019-05-10
LK https://hdl.handle.net/10630/28853
UL https://hdl.handle.net/10630/28853
LA eng
NO Anal. Chem. 2019, 91, 11, 7444–7449
NO Research funded by the Spanish Ministerio de Economia y Competitividad under Project CTQ2014-56058P. P.P. gratefully acknowledges the concession of a FPI research grant linked to the same project.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026