Diatom frustules decorated with zinc oxide nanoparticles for enhanced optical properties
| Autor: | Francesca Nanni, F.R. Lamastra, Grigore Leahu, R. Li Voti, Maria Luisa Grilli, Ilaria Cacciotti, Concita Sibilia, Damiano Salvatori, Alessandro Belardini |
|---|---|
| Přispěvatelé: | Grilli, M. L. |
| Rok vydání: | 2017 |
| Předmět: |
optical properties
Materials science Scanning electron microscope Settore ING-IND/22 - Scienza e Tecnologia dei Materiali microstructure hybrid powder zinc oxide nanoparticles Nanoparticle chemistry.chemical_element Bioengineering Nanotechnology 02 engineering and technology Zinc 010402 general chemistry 01 natural sciences law.invention diatomite law medicine General Materials Science Calcination Electrical and Electronic Engineering Sol-gel photoacoustic spectroscopy Mechanical Engineering diatom frustules General Chemistry diatom frustule hybrid powders 021001 nanoscience & nanotechnology Microstructure 0104 chemical sciences zinc oxide nanoparticle optical propertie Field electron emission Chemical engineering chemistry Mechanics of Materials Triethanolamine 0210 nano-technology Chemistry (all) Materials Science (all) medicine.drug |
| Zdroj: | Nanotechnology. 28(37) |
| ISSN: | 1361-6528 |
| Popis: | Zinc oxide (ZnO) nanoparticles were synthesized on diatomite (DE) surface by a low temperature sol gel technique, starting from zinc acetate dihydrate (Zn(CH3COO)2 • 2H2O) solution in water/ethyl alcohol, in presence of triethanolamine (TEA) with functions of Zn2+ chelating agent, catalyst and mediator of nanoparticle growth on DE surface. Microstructural features were investigated by field emission scanning electron microscopy and x-ray diffraction. ZnO crystalline nanoparticles, well distributed both on the surface and into the porous architecture of diatomite, were obtained just after the synthesis carried out at 80 °C without the need of calcination treatments. The optical properties of ZnO/DE hybrid powders were measured for the first time by means of photoacoustic spectroscopy (PAS). A new method to retrieve both the optical absorption and scattering coefficients from PAS is here discussed for powder aggregates. The fingerprint of the zinc oxide nanoparticles has been highlighted in the Mie scattering resonance in the UV-Vis range, and in the enhancement of the optical absorption with respect to diatomite. © 2017 IOP Publishing Ltd. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|