Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing
Synthesis of nickel (Ni) nanoparticles (NPs) suspensions was performed using a 120 fs (femtosecond) pulse laser to ablate a Ni solid target in n-heptane and water. Analysis of structure, configuration, and sizing was carried out using different independent techniques, such as optical extinction spec...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v119_n23_p13184_MunetonArboleda http://hdl.handle.net/20.500.12110/paper_19327447_v119_n23_p13184_MunetonArboleda |
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paper:paper_19327447_v119_n23_p13184_MunetonArboleda2023-06-08T16:31:37Z Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing Ablation Atomic force microscopy Colloids Heptane Laser ablation Light absorption Light extinction Metal analysis Metals Nanoparticles Nickel oxide Shells (structures) Size distribution Spectroscopic analysis Suspensions (fluids) Synthesis (chemical) Transmission electron microscopy Crystallographic phase Dielectric functions Femtosecond laser ablation in liquid Optical extinction Optical extinction spectroscopy Oxidation reduction Possible mechanisms Spectroscopic features Nickel Synthesis of nickel (Ni) nanoparticles (NPs) suspensions was performed using a 120 fs (femtosecond) pulse laser to ablate a Ni solid target in n-heptane and water. Analysis of structure, configuration, and sizing was carried out using different independent techniques, such as optical extinction spectroscopy (OES), atomic force microscopy (AFM), transmission electron microscopy (TEM), and electron diffraction (ED), which yield interrelated information. AFM microscopy allows determining the spherical shape and size distribution of the NPs in the obtained colloids, while TEM provides knowledge about shape, structure, and size distribution. ED allows identification of the different metal and metal oxide compositions as well as their crystallographic phase. On the other hand, OES gives information related to size distribution, structure, configuration, and composition. Interpretation of these spectra is based on Mie theory, which, in turn, depends on Ni dielectric function. For NP radii smaller than 3 nm, size-dependent free and bound electron contributions to the dielectric function must be considered. To account for the full size span, complete Mie expansion was used for optical extinction cross-section calculations. A theoretical analysis of the dependence of plasmon resonance of bare core and core-shell Ni NPs with core size and shell thickness provides insight about their spectroscopic features. For n-heptane, species like bare core Ni and hollow Ni NPs are found in the colloid, the latter being reported for the first time in this work. Instead, for water, the colloid contains hollow nickel NPs and nickel oxide in different core-shell configurations: Ni-NiO and NiO-Ni, the latter also being reported for the first time in this paper. In both cases, the size distribution agrees with that derived from TEM and AFM analysis. The formation of the oxide species is discussed in terms of oxidation-reduction processes during ablation. Possible mechanisms for the formation of hollow species are proposed. © 2015 American Chemical Society. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v119_n23_p13184_MunetonArboleda http://hdl.handle.net/20.500.12110/paper_19327447_v119_n23_p13184_MunetonArboleda |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ablation Atomic force microscopy Colloids Heptane Laser ablation Light absorption Light extinction Metal analysis Metals Nanoparticles Nickel oxide Shells (structures) Size distribution Spectroscopic analysis Suspensions (fluids) Synthesis (chemical) Transmission electron microscopy Crystallographic phase Dielectric functions Femtosecond laser ablation in liquid Optical extinction Optical extinction spectroscopy Oxidation reduction Possible mechanisms Spectroscopic features Nickel |
| spellingShingle |
Ablation Atomic force microscopy Colloids Heptane Laser ablation Light absorption Light extinction Metal analysis Metals Nanoparticles Nickel oxide Shells (structures) Size distribution Spectroscopic analysis Suspensions (fluids) Synthesis (chemical) Transmission electron microscopy Crystallographic phase Dielectric functions Femtosecond laser ablation in liquid Optical extinction Optical extinction spectroscopy Oxidation reduction Possible mechanisms Spectroscopic features Nickel Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing |
| topic_facet |
Ablation Atomic force microscopy Colloids Heptane Laser ablation Light absorption Light extinction Metal analysis Metals Nanoparticles Nickel oxide Shells (structures) Size distribution Spectroscopic analysis Suspensions (fluids) Synthesis (chemical) Transmission electron microscopy Crystallographic phase Dielectric functions Femtosecond laser ablation in liquid Optical extinction Optical extinction spectroscopy Oxidation reduction Possible mechanisms Spectroscopic features Nickel |
| description |
Synthesis of nickel (Ni) nanoparticles (NPs) suspensions was performed using a 120 fs (femtosecond) pulse laser to ablate a Ni solid target in n-heptane and water. Analysis of structure, configuration, and sizing was carried out using different independent techniques, such as optical extinction spectroscopy (OES), atomic force microscopy (AFM), transmission electron microscopy (TEM), and electron diffraction (ED), which yield interrelated information. AFM microscopy allows determining the spherical shape and size distribution of the NPs in the obtained colloids, while TEM provides knowledge about shape, structure, and size distribution. ED allows identification of the different metal and metal oxide compositions as well as their crystallographic phase. On the other hand, OES gives information related to size distribution, structure, configuration, and composition. Interpretation of these spectra is based on Mie theory, which, in turn, depends on Ni dielectric function. For NP radii smaller than 3 nm, size-dependent free and bound electron contributions to the dielectric function must be considered. To account for the full size span, complete Mie expansion was used for optical extinction cross-section calculations. A theoretical analysis of the dependence of plasmon resonance of bare core and core-shell Ni NPs with core size and shell thickness provides insight about their spectroscopic features. For n-heptane, species like bare core Ni and hollow Ni NPs are found in the colloid, the latter being reported for the first time in this work. Instead, for water, the colloid contains hollow nickel NPs and nickel oxide in different core-shell configurations: Ni-NiO and NiO-Ni, the latter also being reported for the first time in this paper. In both cases, the size distribution agrees with that derived from TEM and AFM analysis. The formation of the oxide species is discussed in terms of oxidation-reduction processes during ablation. Possible mechanisms for the formation of hollow species are proposed. © 2015 American Chemical Society. |
| title |
Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing |
| title_short |
Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing |
| title_full |
Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing |
| title_fullStr |
Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing |
| title_full_unstemmed |
Synthesis of Ni Nanoparticles by Femtosecond Laser Ablation in Liquids: Structure and Sizing |
| title_sort |
synthesis of ni nanoparticles by femtosecond laser ablation in liquids: structure and sizing |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v119_n23_p13184_MunetonArboleda http://hdl.handle.net/20.500.12110/paper_19327447_v119_n23_p13184_MunetonArboleda |
| _version_ |
1768544842015571968 |