Resumen: Homogeneous polycrystalline FexOy nanoparticles were generated by ablation of iron targets in water by nanosecond laser pulses at 532 nm. In ethanol, crystalline core-shell Fe/FexOy structures with size medians around 20 nm were produced. The ablation of FeWxOy targets in water resulted in crystalline hollow shells and homogeneous FeWxOy nanoparticles. In contrast, amorphous core-shell FeWxOy nanoparticles with a median size of 17 nm were produced in ethanol. The size distribution of both the FexOy and the FeWxOy particles showed a slight dependence on fluence and pulse number. This may be related to primary and secondary ablation and modification mechanisms. Idioma: Inglés DOI: 10.1002/cphc.201701214 Año: 2018 Publicado en: CHEMPHYSCHEM 19, 11 (2018), 1414-1419 ISSN: 1439-4235 Factor impacto JCR: 3.077 (2018) Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 10 / 36 = 0.278 (2018) - Q2 - T1 Categ. JCR: CHEMISTRY, PHYSICAL rank: 63 / 148 = 0.426 (2018) - Q2 - T2 Factor impacto SCIMAGO: 1.08 - Physical and Theoretical Chemistry (Q1) - Atomic and Molecular Physics, and Optics (Q1)