Morphology evolution of gold nanoparticles as function of time, temperature, and Au(III)/sodium ascorbate molar ratio
| Autor: | Alberto Fabrizi, Stefano Cattini, Ornella Priolisi, Franco Bonollo, Giovanna Deon |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Sodium ascorbate
Materials science Morphology (linguistics) Absorption spectroscopy Reducing agent Nanoparticle Nanotechnology Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Dynamic light scattering NPs nucleation Atomic and Molecular Physics Gold nanoparticles General Materials Science NPs morphology evolution Crystal growth Multi-twinned particles Star-like morphology Chemistry (all) Atomic and Molecular Physics and Optics Modeling and Simulation Materials Science (all) Condensed Matter Physics General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Colloidal gold Transmission electron microscopy and Optics 0210 nano-technology |
| Popis: | In this work the morphology evolution of Au nanoparticles (AuNPs), obtained by direct reduction, was studied as a function of time, temperature, and Au(III)/sodium ascorbate molar ratio. The NPs morphology was examined by transmission electron microscope with image analysis, while time evolution was investigated by visible and near-infrared absorption spectroscopy and dynamic light scattering. It is found that initially formed star-like NPs transform in more spheroidal particles and the evolution appears more rapid by increasing the temperature while a large amount of reducing agent prevents the remodeling of AuNPs. An explication of morphology evolution is proposed. |
| Databáze: | OpenAIRE |
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