Modulation of population density and size of silver nanoparticles embedded in bacterial cellulose : via ammonia exposure: visual detection of volatile compounds in a piece of plasmonic nanopaper
Heli, B. (Institut Català de Nanociència i Nanotecnologia)
Morales-Narváez, Eden (Institut Català de Nanociència i Nanotecnologia)
Golmohammadi, Hamed (ACECR-Production Technology Institute)
Ajji, A. (Polytechnique Montréal. Département de Génie Chimique)
Merkoçi, Arben (Institució Catalana de Recerca i Estudis Avançats)

Fecha:	2016
Resumen:	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.
Ayudas:	Ministerio de Economía y Competitividad MAT2014-52485-P Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-260
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	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
Publicado en:	Nanoscale, Vol. 8, issue 15 (April 2016) , p. 7984-7991, ISSN 2040-3372

DOI: 10.1039/c6nr00537c

Postprint 26 p, 2.3 MB

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