| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000404271 |
| ISSN: | 0035-001X |
| Authors: | Lárez, J1 Castell, R2 Rojas, C1 |
| Institutions: | 1Universidad Central de Venezuela, Facultad de Física, Caracas, Distrito Federal. Venezuela 2Universidad Simón Bolívar, Departamento de Física, Caracas, Distrito Federal. Venezuela |
| Year: | 2016 |
| Season: | May-Jun |
| Volumen: | 62 |
| Number: | 3 |
| Pages: | 188-192 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | Pulsed laser ablation of Silver and Gold targets, immersed in a polymeric solution of Polyvinylpyrrolidone (PVP), is used to generate colloids and composite metal-polymer. Solutions of PVP in deionized water at different concentrations are employed. Two PVP number average molecular weights were considered, 10000 g/mol and 55000 g/mol. The high purity targets are irradiated between 20 min and 40 min with the third harmonic (THG) (λ = 335 nm) of a Nd:YAG laser operating at a rate of 10 Hz with pulses of 8 ns. Optical spectroscopy in UV and vis regions, Scanning Electron Microscopy (SEM), High Resolution Scanning Electron Microscopy (HR-SEM) and X-Ray are used to identify and determine the shape and size of the produced particles. Very stable sub-micrometric spherical particles for Au/PVP y Ag/PVP samples are obtained with diameters of 0.72 µm y 0.40 µm, respectively. The preparation of colloids is performed in one step and no surfactant or dispersing agent is used in this process |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Ablación láser, Partículas submicronizadas, Polímeros |
| Keyword: | Physics and astronomy, Condensed matter physics, Laser ablation, Sub micronized particles, Polymers |
| Full text: | Texto completo (Ver PDF) |
