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A nanostructured composite based on polyaniline and gold nanoparticles: synthesis and gas sensing properties (Articolo in rivista)

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A nanostructured composite based on polyaniline and gold nanoparticles: synthesis and gas sensing properties (Articolo in rivista) (literal)

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Alternative label

Iole Venditti, Ilaria Fratoddi, Maria Vittoria Russo and Andrea Bearzotti (2013)
A nanostructured composite based on polyaniline and gold nanoparticles: synthesis and gas sensing properties
in Nanotechnology (Bristol. Print); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
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Iole Venditti, Ilaria Fratoddi, Maria Vittoria Russo and Andrea Bearzotti (literal)

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Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy Center for Nanotechnology for Engineering (CNIS), University of Rome 'Sapienza', Piazzale Aldo Moro 5, I-00185 Rome, Italy Centro per la Protezione dell'Ambiente e dei Beni Culturali (CIABC), University of Rome 'Sapienza', Piazzale Aldo Moro 5, I-00185 Rome, Italy IMM-CNR, Via del Fosso del Cavaliere 100, 00133 Roma, Italy (literal)

Titolo

A nanostructured composite based on polyaniline and gold nanoparticles: synthesis and gas sensing properties (literal)

Abstract

Nanostructured composite materials based on polyaniline (PANI) and gold nanoparticles have been prepared by means of an osmosis based method. Several morphologies have been obtained for the pristine nanoPANI and for nanoPANI-Au composite, ranging from amorphous to sponge-like and spherical shapes. On the basis of this morphological investigation, different materials with high surface area have been selected and tested as chemical interactive materials for room temperature gas and vapor sensing. The resistive sensor devices have been exposed to different vapor organic compounds (VOCs) of interest in the fields of environmental monitoring and biomedical applications, such as toluene, acetic acid, ethanol, methanol, acetonitrile, water, ammonia and nitrogen dioxide. The effect of doping with H2SO4 has been studied for both nanoPANI and nanoPANI-Au samples. In particular, nanoPANI-Au showed sensitivity to ammonia (up to 10 ppm) higher than that to other VOCs or interfering analytes. The facile preparation method and the improved properties achieved for the polyaniline-gold composite materials are significant in the nanomaterials field and have promise for applications in ammonia vapor monitoring. (literal)

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