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

Author(s)

de Lima, Lucas F. ^{[1, 2]} ; Maciel, Cristiane C. ^[3] ; Ferreira, Andre L. ^[2] ; Rubira, Rafael J. G. ^[4] ; Constantino, Carlos J. L. ^[4] ; Ferreira, Marystela ^[2]

Affiliation

^[1] State Univ Campinas UNICAMP, Inst Chem, Dept Analyt Chem, Campinas, SP - Brazil

^[2] Fed Univ Sao Carlos UFSCar, Ctr Sci & Technol Sustainabil CCTS, BR-18052780 Sorocaba, SP - Brazil

^[3] Sao Paulo State Univ Julio de Mesquita Filho UNES, Sorocaba, SP - Brazil

^[4] Sao Paulo State Univ Julio de Mesquita Filho UNES, Presidente Prudente, SP - Brazil

• Document type: Journal article
• Source: Journal of Applied Polymer Science; v. 138, n. 5 AUG 2020.
• Web of Science Citations: 0

Abstract

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 (Fe3O4-np), besides conventional poly(allylamine hydrochloride) (PAH) e poly(vinyl sulfonic acid) (PVS) polyelectrolytes, demonstrating the synergistic effect between Ppy and Fe3O4-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 (Fe3O4-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 Fe3O4-np forming (Fe3O4-np/Ppy)(3)LbL film. The results carried out in this study suggest that the (Fe3O4-np/Ppy)(3)LbL film can be applied as a possible electrochemical or optical non-enzymatic sensor for analytical detection. (AU)

• FAPESP's process: 16/09634-0 - Interaction between biomembrane models based on Langmuir films and giant unilamellar vesicles (GUVs) with triazine herbicides and detection via SERS spectroscopy.
• Grantee: Rafael Jesus Gonçalves Rubira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/04061-8 - Layer by layer films of polypyrrol and magnetite nanoparticles in the analytical determination of parabens
• Grantee: Lucas Felipe de Lima
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 16/19387-0 - LbL (LAYER-BY-LAYER) and Langmuir-Blodgett (LB) nanostructured films with emodin for systems carriers.
• Grantee: Marystela Ferreira
• Support Opportunities: Regular Research Grants