RT Journal Article
T1 Spectral identification in the attogram regime through laser-induced emission of single optically-trapped nanoparticles in air.
A1 Purohit, Pablo
A1 Fortes-Román, Francisco Javier
A1 Laserna-Vázquez, José Javier
K1 Nanopartículas
K1 Espectroscopía de láser
AB Current trends in nanoengineering are bringing along new structures of diverse chemical compositions that need to be meticulously defined in order to ensure their correct operation. Few methods can provide the sensitivity required to carry out measurements on individual nano objects without tedious sample pre-treatment or data analysis. In the present study, we introduce a pathway for the elemental identification of single nanoparticles (NPs) that avoids suspension in liquid media by means of optical trapping and laser-induced plasma spectroscopy. We demonstrate spectroscopic detection and identification of individual 25 (± 3.7) to 70 (± 10.5) nm in diameter Cu NPs stably trapped in air featuring masses down to 73 ± 35 attograms. We found an increase in the absolute number of photons produced as size of the particles decreased; pointing towards a more efficient excitation of ensembles of only ca. 7 x 10^5 Cu atoms in the onset plasma.
PB Wiley-VCH
YR 2017
FD 2017-09-06
LK https://hdl.handle.net/10630/28914
UL https://hdl.handle.net/10630/28914
LA eng
NO Purohit, P.; Fortes, F. J.; Laserna, J. J. Angew. Chem., Int. Ed. 2017, 56 (45), 14178−14182.
NO Ministerio de Economia y Competitividad, Gobierno de España (Proyecto de investigación CTQ2014-56058P).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026