Synthesis of Yb nanoparticles by laser ablation of ytterbium target in sodium bis(2-ethylhexyl)sulfosuccinate reverse micellar solution |
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Authors: | Pietro Calandra Domenico Lombardo Angela Ruggirello Vincenzo Turco Liveri |
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Affiliation: | a IPCF, Istituto per i Processi Chimico-Fisici - Consiglio Nazionale delle Ricerche - Sez. di Messina, Salita Sperone - C.da Papardo 98158 Faro Superiore (ME), Italy b Dipartimento di Fisica della Materia e Ingegneria Elettronica, Università degli Studi di Messina - C.da Papardo - Salita Sperone 98166 S.Agata (ME), Italy c Dipartimento di Chimica-Fisica, Università degli Studi di Palermo, Viale delle Scienze Parco d'Orleans II, 90128 Palermo, Italy |
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Abstract: | Surfactant-coated ytterbium nanoparticles were produced by Nd:YAG laser ablation of a Yb bulk target immersed in sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/n-heptane micellar solution. In our experimental conditions, as highlighted by IR spectroscopy, AOT molecules are not decomposed by the intense laser pulses but play a pivotal role in the stabilisation of Yb nanoparticles. The formation of Yb nanoparticles in the liquid phase was monitored by UV-Vis spectroscopy whereas the Yb/AOT composites obtained by evaporation of the organic solvent were characterised by XPS and TEM. Data analysis consistently shows the presence of surfactant-coated, nearly spherical and non-interacting Yb nanoparticles of mean diameter of 3 nm.Moreover, the presence of bigger polycrystalline nanoparticles (about 30%) in coexistence with smaller mono crystalline ones indicates that, after the rapid formation of the pristine Yb nanoparticles from plume condensation, two processes effectively compete for their size distribution: nanoparticle agglomeration and surfactant adsorption. |
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Keywords: | Nanomaterials Laser ablation Reverse micelles Surfactant Ytterbium |
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