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Characterization of Free-Standing PEDOT:PSS/Iron Oxide Nanoparticle Composite Thin Films and Application As Conformable Humidity Sensors (Articolo in rivista)

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Characterization of Free-Standing PEDOT:PSS/Iron Oxide Nanoparticle Composite Thin Films and Application As Conformable Humidity Sensors (Articolo in rivista) (literal)

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Taccola, S; Greco, F; Zucca, A; Innocenti, C; Fernandez, CD; Campo, G; Sangregorio, C; Mazzolai, B; Mattoli, V (2013)
Characterization of Free-Standing PEDOT:PSS/Iron Oxide Nanoparticle Composite Thin Films and Application As Conformable Humidity Sensors
in ACS applied materials & interfaces (Print); American Chemical Society, Washington (Stati Uniti d'America)
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Taccola, S; Greco, F; Zucca, A; Innocenti, C; Fernandez, CD; Campo, G; Sangregorio, C; Mazzolai, B; Mattoli, V (literal)

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1 ] Ist Italiano Tecnol, Ctr MicrobioRobot SSSA, I-56025 Pontedera, Italy 2 ] Scuola Super StAnna, Biorobot Inst, I-56025 Pontedera, Italy 3 ] Univ Florence, INSTM, I-50019 Florence, Italy 4 ] Univ Florence, Dipartimento Chim U Schiff, I-50019 Florence, Italy 5 ] CNR IMEM, I-43124 Parma, Italy 6 ] CNR ISTM, I-20133 Milan, Italy (literal)

Titolo

Characterization of Free-Standing PEDOT:PSS/Iron Oxide Nanoparticle Composite Thin Films and Application As Conformable Humidity Sensors (literal)

Abstract

In this study, a new simple, fast, and inexpensive technique for the preparation of free-standing nanocomposite ultrathin films based on the conductive polymer poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and embedding iron oxide nanoparticles (NPs) is presented. These nanofilms were fabricated by a single step of spin-coated assisted deposition in conjunction with a release technique (\"supporting layer technique\") to detach them from the substrate. Free-standing nanofilms can be easily transferred onto several substrates due to their high conformability, preserving their functionalities. The effect of the addition of iron oxide nanoparticles on the structural and functional properties of the PEDOT:PSS nanofilms is investigated through topography, thickness, magnetic, magneto-optical activity, and conductivity characterizations. PEDOT:PSS and PEDOT:PSS/iron oxide NP nanofilms were tested as resistive humidity sensors. Their sensitivity to humidity was found to increase with increasing nanoparticle concentration. On the basis of these results, it is expected that these composites may furnish inexpensive and reliable means for relative humidity detection. (literal)

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