Layer-by-Layer nanostructured films of magnetite nanoparticles and polypyrrole towards synergistic effect on methylparaben electrochemical detection

Lima, Lucas F. de; Daikuzono, Cristiane Margarete; Pereira, Elisabete Alves

doi:10.1016/j.apsusc.2019.144278

Cited by 31 publications

(21 citation statements)

References 69 publications

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“…The precipitate was filtered, washed bountifully with clean water and dried under vacuum (30 C) for 2 days. 17,22…”

Section: Synthesis Of Fe 3 O 4 -Npmentioning

confidence: 99%

“…Both electrochemical measurements were carried in a three-electrode cell using Ag/AgCl (KCl 3 mol L −1 ) electrode as a reference, a platinum foil as a counter electrode (geometric area of 1.0 cm 2 ) and a working electrode composed by an Au modified glass substrate with the LbL films. 17 3 | RESULTS AND DISCUSSION…”

Section: Lbl Film Characterizationsmentioning

confidence: 99%

“…7 This composite has a complex mechanism of interaction with the 3d orbital of Au atom in the substrate, which could change the surface plasmonic effect because of the adsorption the composite film causing a shift of the SPR angle, reducing the θ values close to 45 . 7,17,29,30 The refraction angles of each bilayer in the LbL film architecture were structured in Table 2.…”

Section: Interaction Study By Sprmentioning

confidence: 99%

“…The particle size distribution (diameter) was determined around 16.28 ± 2.48 nm with 15.23% of the polydispersity index corroborating with the literature. 17 The polymer matrix presence allowed the spherical nanoparticles to be uniformly distributed without bilayers interlayer boundaries. Moreover, the nanoparticles tend to interpenetrate in the LbL film bilayers, decreasing the particle distance and its electrostatic interaction.…”

Section: Interaction Study By Micro-ramanmentioning

confidence: 99%

“…16 However, the synergistic effect between Fe 3 O 4 -np and Ppy functionalized by the LbL technique is scarce, which makes it interesting to study the existing synergy between both materials. Recently, the authors published a paper 17 in which gold electrodes functionalized with Ppy and magnetite nanoparticles (Fe 3 O 4 -np/Ppy) showed synergistic effects in LbL films and, consequently, the sensors of these nanocomposite films presented a good performance when tested on real samples of breast milk, urine, and cosmetic. 17 This performance was superior to the LBL films of Ppy and magnetite nanoparticles individually.…”

mentioning

confidence: 99%

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An investigation of the synergistic effect between magnetite nanoparticles and polypyrrole in nanostructured layer‐by‐layer films

Lima

Maciel

Ferreira

et al. 2020

J of Applied Polymer Sci

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In this paper, we report the controlled fabrication of layer-by-layer (LbL) films deposited on gold substrates with three different supramolecular architectures using polypyrrole (Ppy) and magnetite nanoparticles (Fe 3 O 4-np), besides conventional poly(allylamine hydrochloride) (PAH) e poly(vinyl sulfonic acid) (PVS) polyelectrolytes, demonstrating the synergistic effect between Ppy and Fe 3 O 4-np such as a result of their interaction. Modified gold electrodes were analyzed by contact angle (wettability), surface plasmon resonance (SPR), raman spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. The (Fe 3 O 4-np/Ppy) 3 architecture was also evaluated by scanning electron microscopy. The modified gold electrodes present more homogeneous covering, higher electron transfer and a decrease of resistance with the incorporation of the nanostructured materials such as Ppy and Fe 3 O 4-np forming (Fe 3 O 4-np/Ppy) 3 LbL film. The results carried out in this study suggest that the (Fe 3 O 4-np/Ppy) 3 LbL film can be applied as a possible electrochemical or optical non-enzymatic sensor for analytical detection.

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“…The precipitate was filtered, washed bountifully with clean water and dried under vacuum (30 C) for 2 days. 17,22…”

Section: Synthesis Of Fe 3 O 4 -Npmentioning

confidence: 99%

Section: Lbl Film Characterizationsmentioning

confidence: 99%