IMPEDANCE SPECTROSCOPY ANALYSIS OF DODAB/NITSPC LAYER-BY-LAYER (LBL) FILMS FOR DETECTION OF CARBENDAZIM (MBC) USING INFORMATION VISUALIZATION METHODS

Leonardo Negri Furini; Jose Diego Fernandes; Douglas Henrique Vieira; Luis F.C. Morato (DR), FCT-UNESP; Neri Alves; Carlos José leopoldo Constantino

Paper Title

Authors

Leonardo Negri Furini
Jose Diego Fernandes
Douglas Henrique Vieira
Luis F.C. Morato (DR), FCT-UNESP
Neri Alves
Carlos José leopoldo Constantino

Modality

Pôster

Subject area

Biossensores / Biomoléculas

Publishing Date

12/12/2023

Country of Publishing

Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/workshop-do-ineo-2023/613279-impedance-spectroscopy-analysis-of-dodabnitspc-layer-by-layer-(lbl)-films-for-detection-of-carbendazim-(mbc)-usi

ISBN

978-65-272-0088-8

Keywords

e-tongue, impedance spectroscopy, carbendazim, information visualization, LbL films

Summary

Usually, electronic tongues (e-tongue) do not require specific interactions to discriminate aqueous solutions. Among the several factors which determine the electrical properties of sensorial units, the interactions between liquids and interfaces have a crucial role. Here, we explore the interaction between dioctadecyldimethylammonium bromide (DODAB) lipid and carbendazim (MBC) pesticide in an e-tongue to discriminate different MBC concentrations in aqueous solutions. The sensorial units were fabricated of gold interdigitated electrodes (IDEs) coated with Layer-by-Layer (LbL) films of DODAB and nickel tetrasulfonatedphthalocyanine (NiTsPc), perylene and 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (DPPG), namely DODAB/NiTsPc and Perylene/DPPG, respectively. Besides a bare electrode also constituted the e-tongue to distinguish MBC concentrations from 1.0 x 10-7 up to 1.0 x 10-10 mol L-1, by impedance spectroscopy. The LbL films were manually fabricated obtaining linear growth monitored via UV-Vis absorption spectroscopy. Optical images associated with chemical mapping reveals the presence of small aggregates in the DODAB/NiTsPc LbL film surface. Although the e-tongue was able to discriminate all MBC concentrations by means interactive document map (IDMAP), only the sensorial unit covered with DODAB/NiTsPc LbL film presents satisfactory response. According to the equivalent circuit the main contribution arises from the bulk and film surface due to the interaction between DODAB and MBC indicating selectivity of the sensorial unit. Finally, the adsorption of MBC molecules onto the film surface induced an irreversible process, although there are some frequencies which the sensorial unit response seems to be reversible, as shown by parallel coordinates. Acknowledgment The authors acknowledge Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, grants 2020/12282-4), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) –Finance Code 001, and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for the financial support (Process 405087/2021-7 and 311601/2020-0). The authors also acknowledge Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), Instituto Nacional de Eletrônica Orgânica (INEO), for technical support.

Title of the Event: Workshop do INEO 2023
City of the Event: Nazaré Paulista
Title of the Proceedings of the event: Anais do Workshop INEO 2023
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

FURINI, Leonardo Negri et al.. IMPEDANCE SPECTROSCOPY ANALYSIS OF DODAB/NITSPC LAYER-BY-LAYER (LBL) FILMS FOR DETECTION OF CARBENDAZIM (MBC) USING INFORMATION VISUALIZATION METHODS.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/613279-IMPEDANCE-SPECTROSCOPY-ANALYSIS-OF-DODABNITSPC-LAYER-BY-LAYER-(LBL)-FILMS-FOR-DETECTION-OF-CARBENDAZIM-(MBC)-USI. Access in: 22/12/2024