RT Journal Article
T1 Atomization efficiency and photon yield in laser-induced breakdown spectroscopy analysis of single nanoparticles in an optical trap.
A1 Purohit, Pablo
A1 Fortes-Román, Francisco Javier
A1 Laserna-Vázquez, José Javier
K1 Nanopartículas
K1 Espectroscopía de plasma inducido por láser
AB Laser-induced breakdown spectroscopy (LIBS) was employed for investigating the influence of particle size on the dissociation efficiency and the absolute production of photons per mass unit of airborne solid graphite spheres under single-particle regime. Particles of average diameter of 400 nm were probed and compared with 2 μm particles. Samples were first catapulted into aerosol form and then secluded in an optical trap set by a 532 nmlaser. Trap stability was quantified before subjecting particles to LIBS analysis. Fine alignment of the different lines comprising the optical catapulting-optical trapping-laser induced breakdown spectroscopy instrument and tuning of excitation parameters conditioning the LIBS signal such as fluence and acquisition delay are described in detail with the ultimate goal of acquiring clear spectroscopic data on masses as low as 75 fg. The atomization efficiency and the photon yield increase as the particle size becomes smaller. Time-resolved plasma imaging studies were conducted to elucidate the mechanisms leading to particle disintegration and excitation.
PB Elsevier
YR 2017
FD 2017-02-16
LK https://hdl.handle.net/10630/28918
UL https://hdl.handle.net/10630/28918
LA eng
NO Purohit, P.; Fortes, F. J.; Laserna, J. J. Spectrochim. Acta, Part B 2017, 130, 75−81
NO Ministerio de Economía y Competitividad, Gobierno de España (Proyecto CTQ2014-56058P).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026