Agradecimentos: The authors are grateful for the financial support of the Ministry of Science, Technology, and Innovation of Colombia (Minciencias) and the Colombian Society of Physical Engineering (SCIF), and the Fundación de Amparo à Pesquisa do Estado de São Paulo (FAPESP, grants # 2012/1027-5,...

Agradecimentos: The authors are grateful for the financial support of the Ministry of Science, Technology, and Innovation of Colombia (Minciencias) and the Colombian Society of Physical Engineering (SCIF), and the Fundación de Amparo à Pesquisa do Estado de São Paulo (FAPESP, grants # 2012/1027-5, 2019/18460-4). The authors thank the IEEE 2020 global humanitarian engineering project "Community technology literacy through 3D printing technology and energy harvesting cells for water monitoring applications". F.A. and A.R. are CNPq fellows. M.J.M.J. is a fellow of Minciencias. The authors are also grateful to Prof. Elidiane Cipriano Rangel from the Laboratory of Technological Plasmas (UNESP, Sorocaba, SP, Brazil) for the first SEM analyses. The authors wish to thank LABNANO, Centro Brasileiro de Pesquisas Físicas-RJ, Brazil, for the SEM measurements

Abstract: Heavy metal pollution is posing a severe health risk on living organisms. Therefore, significant research efforts are focused on their detection. Here, we developed a sensing platform sensor for the selective detection of lead(II) acetate. The sensor is based on self-assembled...

Abstract: Heavy metal pollution is posing a severe health risk on living organisms. Therefore, significant research efforts are focused on their detection. Here, we developed a sensing platform sensor for the selective detection of lead(II) acetate. The sensor is based on self-assembled polyethyleneimine-functionalized carbon nanotubes (PEI-CNTs) and graphene oxide films deposited onto gold interdigitated electrodes. The graphene-based nanostructure showed a resistive behavior, and the fabricated layer-by-layer film was used to detect Pb(II) acetate in an aqueous solution by comparison of three electrochemical methods: impedance spectroscopy, amperometry, and potentiometry stripping analysis. The results obtained from different methods show that the detection limit was down to 36 pmol/L and the sensitivity up to 4.3 µAL/µmol, with excellent repeatability. The detection mechanism was associated with the high affinity of heavy metal ions with the functional groups present in the PEI-CNTs and GO, allowing high performance and sensitivity. The achieved results are important for the research toward integrated monitoring and sensing platforms for Pb(II) contamination in drinking water

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2012/1027-5; 2019/18460-4

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

Aberto