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Hydrophobic Noble Metal Nanoparticles: Synthesis, Characterization and Perspectives as Gas Sensing Materials

2015; Elsevier BV; Volume: 120; Linguagem: Inglês

10.1016/j.proeng.2015.08.822

1877-7058

Andrea Bearzotti, Lucia Fontana, Ilaria Fratoddi, Iole Venditti, Giuseppe Testa, Silvia Rasi, Viviana Gatta, M.V. Russo, Emiliano Zampetti, Paolo Papa, Antonella Macagnano,

Gas Sensing Nanomaterials and Sensors

Noble metal nanoparticles (MNPs) with controlled diameters in the range 5-15 nm, have been prepared by chemical wet reduction reactions starting from Au precursor in the presence of bifunctional thiolate, i.e. biphenyl-4,4′-dithiol. MNPs have been deposited on electrospinned titania nanofibers by dipping. The composite has been investigated at room temperature in resistive type device under UV irradiation. IV curves show properties of photoconduction and upon exposure towards sulphur dioxide (SO2) a sensing behaviour has been observed. The devices shoved an exponential decay for increasing values of SO2 concentration.