INVESTIGATION OF THE SYNERGISTIC EFFECT OF LAYER-BY-LAYER FILMS OF CARBON NANOTUBES AND POLYPYRROLE ON A FLEXIBLE DEVICE FOR ELECTROCHEMICAL ANALYSIS

Stefanny Franco Amaro; Cristiane C. Maciel; Jéssica Rodrigues; Amanda Sousa; Lucas V. B. Vasconcelos Fré; ANERISE DE BARROS; Marystela Ferreira

Título do Trabalho

Autores

Stefanny Franco Amaro
Cristiane C. Maciel
Jéssica Rodrigues
Amanda Sousa
Lucas V. B. Vasconcelos Fré
ANERISE DE BARROS
Marystela Ferreira

Modalidade

Pôster - resumo

Área temática

Sensores e biossensores

Data de Publicação

27/05/2026

País da Publicação

Brasil

Idioma da Publicação

pt-BR

Página do Trabalho

https://www.even3.com.br/anais/workshop-do-ineo-2026/1453011-investigation-of-the-synergistic-effect-of-layer-by-layer-films-of-carbon-nanotubes-and-polypyrrole-on-a-flexibl

ISBN

978-65-272-2467-9

Palavras-Chave

PBAT; graphite; sensor; layer-by-layer ?lm.

Resumo

This research aims to study flexible sensors based on a poly(butylene adipate-co-terephthalate) (PBAT) biodegradable polymer and graphite. Sensors were modified through the layer-by-layer (LbL) technique to improve their electrochemical behavior for paraquat (PQ) detection. Nanostructured films were obtained by alternating layers of anionic and cationic materials, carbon nanotubes (CNTs), and polypyrrole (PPY), respectively. The devices, with and without modification, were characterized by contact angle, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). Electrochemical characterization was labeled via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). PQ molecules were detected using the differential pulse voltammetry (DPV) technique in a concentration range of 0.1 to 2.1 µM. The sensor detection limit (LOD) was obtained using the analytical curve, with it being equal to 0.073 µM. The LbL film gPBAT(PPY/CNT)n sensor showed good stability, reproducibility, and repeatability, with recovery values ranging from 99.4% to 109.3% for PQ when the analyzed samples were contaminated with tap water. The produced electrodes have the advantage of being flexible, disposable, reproducible, and of low manufacturing cost, which makes them attractive for portable environmental analysis. References Maciel, C.C.; de Lima, L.F.; Ferreira, A.L.; de Araujo, W.R.; Ferreira, M. Development of a flexible and disposable electrochemical sensor based on poly (butylene adipate-co-terephthalate) and graphite for hydroquinone sensing. Sens. Actuators Rep. 2022, 4, 100091. Maciel, C.C.; Freitas, A.; Medrades, J.; Ferreira, M. Simultaneous Determination of Catechol and Paraquat Using a Flexible Electrode of PBAT and Graphite Modified with Gold Nanoparticles and Copper Phthalocyanine (g-PBAT/AuNP/CuTsPc) LbL Film. J. Electrochem. Soc. 2022, 169, 27505. Silva, J.S.; De Barros, A.; Constantino, C.J.L.; Simões, F.R.; Ferreira, M. Layer-by-layer films based on carbon nanotubes and polyaniline for detecting 2-chlorophenol. J. Nanosci. Nanotechnol. 2014, 14, 6586–6592. de Lima, L.F.; Daikuzono, C.M.; Miyazaki, C.M.; Pereira, E.A.; Ferreira, M. Layer-by-Layer nanostructured ?lms of magnetitenanoparticles and polypyrrole towards synergistic effect on methylparaben electrochemical detection. Appl. Surf. Sci.2020,505,144278. Acknowledgments INEO (FAPESP - processo nº 2025/27044-5); Fapesp 2025/18461-1.

Título do Evento: Workshop do INEO 2026
Cidade do Evento: Nazaré Paulista
Título dos Anais do Evento: Anais do Workshop do INEO 2026
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

AMARO, Stefanny Franco et al.. INVESTIGATION OF THE SYNERGISTIC EFFECT OF LAYER-BY-LAYER FILMS OF CARBON NANOTUBES AND POLYPYRROLE ON A FLEXIBLE DEVICE FOR ELECTROCHEMICAL ANALYSIS.. In: Anais do Workshop do INEO 2026. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2026. Disponível em: https//www.even3.com.br/anais/workshop-do-ineo-2026/1453011-INVESTIGATION-OF-THE-SYNERGISTIC-EFFECT-OF-LAYER-BY-LAYER-FILMS-OF-CARBON-NANOTUBES-AND-POLYPYRROLE-ON-A-FLEXIBL. Acesso em: 26/07/2026