Modulation of population density and size of silver nanoparticles embedded in bacterial cellulose
The localized surface plasmon resonance exhibited by noble metal nanoparticles can be sensitively tuned by varying their size and interparticle distances. We report that corrosive vapour (ammonia) exposure dramatically reduces the population density of silver nanoparticles (AgNPs) embedded within ba...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:240998 |
| Acceso en línea: | https://ddd.uab.cat/record/240998 https://dx.doi.org/urn:doi:10.1039/c6nr00537c |
| Access Level: | acceso abierto |
| Palabra clave: | Bacterial cellulose Innovative approaches Interparticle distances Localized surface plasmon resonance Plasmonic properties Population densities Silver nanoparticles Silver nanoparticles (AgNps) Ammonia Animals Cellulose Food Analysis Metal Nanoparticles Microscopy, Electron, Transmission Nanostructures Nanotechnology Particle Size Silver Spectrum Analysis, Raman Surface Plasmon Resonance Volatile Organic Compounds |
| Sumario: | The localized surface plasmon resonance exhibited by noble metal nanoparticles can be sensitively tuned by varying their size and interparticle distances. We report that corrosive vapour (ammonia) exposure dramatically reduces the population density of silver nanoparticles (AgNPs) embedded within bacterial cellulose, leading to a larger distance between the remaining nanoparticles and a decrease in the UV-Vis absorbance associated with the AgNP plasmonic properties. We also found that the size distribution of AgNPs embedded in bacterial cellulose undergoes a reduction in the presence of volatile compounds released during food spoilage, modulating the studied nanoplasmonic properties. In fact, such a plasmonic nanopaper exhibits a change in colour from amber to light amber upon the explored corrosive vapour exposure and from amber to a grey or taupe colour upon fish or meat spoilage exposure. These phenomena are proposed as a simple visual detection of volatile compounds in a flexible, transparent, permeable and stable single-use nanoplasmonic membrane, which opens the way to innovative approaches and capabilities in gas sensing and smart packaging. |
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