title: Polyvinyl alcohol electrospun nanofibers containing Ag nanoparticles used as sensors for the detection of biogenic amines.
abstract: Polyvinyl alcohol (PVA) electrospun nanofibers containing Ag nanoparticles (NPs) have been deposited on glass substrates. The aim of the work was to test the feasibility of this approach for the detection of biogenic amines by using either the Ag localized surface plasmon resonance quenching caused by the adsorption of amines on Ag NPs or by detecting the amines by surface enhanced Raman spectroscopy (SERS) after adsorption, from the gas phase, on the metal NPs. Two different approaches have been adopted. In the first one an ethanol/water solution containing AgNO3 was used directly in the electrospinning apparatus. In this way, a simple heat treatment of the nanofibers mat was sufficient to obtain the formation of Ag NPs inside the nanofibers and a partial cross-link of PVA. In the second procedure, the Ag NPs were deposited on PVA nanofibers by using the supersonic cluster beam deposition method, so that a beam of pure Ag NPs of controlled size was obtained. Exposure of the PVA mat to the beam produced a uniform distribution of the NPs on the nanofibers surface. Ethylendiamine vapors and volatile amines released from fresh shrimp meat were chemisorbed on the nanofibers mats. A SERS spectrum characterized by a diagnostic Ag-N stretching vibration at 230 cm(-1) was obtained. The results allow to compare the two different approaches in the detection of ammines.
authors: Dipartimento di Scienze Chimiche-Università degli Studi di Padova, Via Marzolo, 1 Padova I-35131, Italy.
authors: Carla
authors: C
authors: Marega
authors: Jenny
authors: J
authors: Maculan
authors: Gian
authors: G
authors: Andrea Rizzi
authors: Roberta
authors: R
authors: Saini
authors: Emanuele
authors: E
authors: Cavaliere
authors: Luca
authors: L
authors: Gavioli
authors: Mattia
authors: M
authors: Cattelan
authors: Giuseppe
authors: G
authors: Giallongo
authors: Antonio
authors: A
authors: Marigo
authors: Gaetano
authors: G
authors: Granozzi
mesh_terms: D000327:Adsorption; D000588:Amines / Q000737:chemistry*; D000818:Animals; D003432:Cross-Linking Reagents / Q000737:chemistry; D000431:Ethanol / Q000737:chemistry; D005029:Ethylenediamines / Q000737:chemistry; D005504:Food Analysis / Q000379:methods; D005740:Gases; D005898:Glass; D006358:Hot Temperature; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D057139:Nanofibers; D036103:Nanotechnology / Q000379:methods*; D033561:Penaeidae; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D017747:Seafood; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry
chemical_list: D000588:Amines; D003432:Cross-Linking Reagents; D005029:Ethylenediamines; D005740:Gases; D014867:Water; D000431:Ethanol; D012834:Silver; C031234:ethylenediamine; D011142:Polyvinyl Alcohol