Gold nanoparticles to boost the gas sensing performance of porous sol–gel thin films
| Autor: | Alessandro Martucci, Dario Buso, Enrico Della Gaspera |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Nanoparticle Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Chemical reaction 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials Colloidal gold Specific surface area Materials Chemistry Ceramics and Composites Surface plasmon resonance Thin film 0210 nano-technology Porosity Sol-gel |
| Zdroj: | Journal of Sol-Gel Science and Technology. 60:366-377 |
| ISSN: | 1573-4846 0928-0707 |
| Popis: | In this paper we review our research work of the last few years on the synthesis and the gas sensing properties of nanocomposite thin films of sensitive materials with a large specific surface area, which consist of porous matrices containing functional nanocrystals of metal oxides and gold. The film porosity provides a path for the gas molecules to reach the active reaction sites on the nanoparticles surface undergoing chemical reactions which nature depends on the nature of the active material. The introduction of Au nanoparticles affects the reactions mechanism improving the sensing process, moreover the Au Surface Plasmon Resonance peak can be used for the realization of selective optical gas sensor. Two different synthetic approaches will be described, each of them characterized by a peculiar control of the final materials morphology, structure and micro-structure. |
| Databáze: | OpenAIRE |
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