title: Fast ultrasound assisted synthesis of chitosan-based magnetite nanocomposites as a modified electrode sensor.
abstract: Chitosan-based magnetite nanocomposites were synthesized using a versatile ultrasound assisted in situ method involving one quick step. This synthetic route approach results in the formation of spheroidal nanoparticles (Fe3O4) with average diameter between 10 and 24nm, which were found to be superparamagnetic with saturation magnetization (Ms) ranges from 32-57emug(-1), depending on the concentration. The incorporation of Fe3O4 into chitosan matrix was also confirmed by FTIR and TG techniques. This hybrid nanocomposite has the potential application as electrochemical sensors, since the electrochemical signal was excepitionally stable. In addition, the in situ strategy proposed in this work allowed us to synthesize the nanocomposite system in a short time, around 2min of time-consuming, showing great potential to replace convencional methods. Herein, the procedure will permit a further diversity of applications into nanocomposite materials engineering.
authors.affiliation: Group of Chemistry of Advanced Materials (GQMAT)-Department of Analytical Chemistry and Physical-Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: tiagomfreire.ufc@gmail.com.
authors.forename: T M
authors.initials: TM
authors.lastname: Freire
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. Electronic address: lmudutra@hotmail.com.
authors.forename: L M U
authors.initials: LMU
authors.lastname: Dutra
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: daniloqueiroz46@gmail.com.
authors.forename: D C
authors.initials: DC
authors.lastname: Queiroz
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: nagilaricardo@gmail.com.
authors.forename: N M P S
authors.initials: NMPS
authors.lastname: Ricardo
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: kambarreto@yahoo.com.br.
authors.forename: K
authors.initials: K
authors.lastname: Barreto
authors.affiliation: Department of Physical, University of Santiago de Chile, USACH, Av. Ecuador 3493, Santiago, Chile. Electronic address: juliano.denardin@usach.cl.
authors.forename: J C
authors.initials: JC
authors.lastname: Denardin
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. Electronic address: wurm@mpip-mainz.mpg.de.
authors.forename: Frederik R
authors.initials: FR
authors.lastname: Wurm
authors.affiliation: Group of Electrochemistry and Corrosion (GELCORR)-Department of Analytical Chemistry and Physical-Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: pinheiro.cs@gmail.com.
authors.forename: C P
authors.initials: CP
authors.lastname: Sousa
authors.affiliation: Group of Electrochemistry and Corrosion (GELCORR)-Department of Analytical Chemistry and Physical-Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: adriana@ufc.br.
authors.forename: A N
authors.initials: AN
authors.lastname: Correia
authors.affiliation: Group of Electrochemistry and Corrosion (GELCORR)-Department of Analytical Chemistry and Physical-Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: pln@ufc.br.
authors.forename: P
authors.initials: P
authors.lastname: de Lima-Neto
authors.affiliation: Group of Chemistry of Advanced Materials (GQMAT)-Department of Analytical Chemistry and Physical-Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, CEP 60451-970 Fortaleza, CE, Brazil. Electronic address: fechine@ufc.br.
authors.forename: P B A
authors.initials: PBA
authors.lastname: Fechine
mesh_terms: D060326:Chemistry Techniques, Synthetic; D048271:Chitosan / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D007700:Kinetics; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D000069453:Ultrasonic Waves
chemical_list: D058185:Magnetite Nanoparticles; D048271:Chitosan
keywords: Chitosan; Magnetite; Nanocomposites; Superparamagnetic; Ultrasound