Nickel Tetrasulfonated Phthalocyanine Decorated with AuNP as a Double Sensorial Platform: SERS and Electrochemical

Author(s)

Martin, Cibely Silva ; Kavazoi, Henry Seitiro ; Miyazaki, Celina Massumi ; Alessio, Priscila ; Constantino, Carlos Jose Leopoldo

• Document type: Journal article
• Source: CHEMOSENSORS; v. 11, n. 7, p. 15-pg., 2023-07-01.

Abstract

The development of materials for multiple applications is a challenge in the fields of technology and materials science. In this work, screen-printed carbon electrodes (SPCEs) were modified with an electropolymerized nickel tetrasulfonated phthalocyanine film (polymeric-NiTsPc = p-NiTsPc) decorated with gold nanoparticles (AuNP). The modified SPCEs were applied as a sensing platform for analysis via electrochemical and surface-enhanced Raman scattering (SERS) spectroscopy. The SPCEs modification was based on the potential cycling firstly in a NiTsPc solution and then in an AuHCl4 solution, with the fast formation of spherical AuNP through the p-NiTsPc film surface. The modified electrode based on SPCE/p-NiTsPc/AuNP showed a synergetic effect in voltammetric measurements in [Fe(CN)(6)](3-)/[Fe(CN)(6)](4-) probe as well as an electrocatalytic effect in the presence of dopamine. The calibration curve towards dopamine detection presented a linear range from 1 to 10 & mu;mol/L with a limit of detection of 0.73 & mu;mol/L. The spectroelectrochemistry measurements combining SERS and the applied potential of -60 mV showed that the SPCE/p-NiTsPc/AuNP and SPCE/AuNP can be powerfully used as a dual sensing platform for dopamine detection. In the case of SPCE/p-NiTsPc/AuNP, p-NiTsPc plays an important role in facilitating electron transfer during the electrochemical reaction, while AuNP is crucial for obtaining SERS signals for dopamine detection. (AU)

• FAPESP's process: 20/11803-0 - Biosensors for dual detection of SARS-CoV-2 combining SERS and electrochemical impedance
• Grantee: Celina Massumi Miyazaki
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/15019-0 - Combination of confocal fluorescence microscopy and surface-enhanced Raman scattering techniques: interaction, detection, and quantification of molecules of interest in biomimetic system.
• Grantee: Cibely da Silva Martin Sonvesso
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/50869-6 - INCT 2014: on Organic Electronics
• Grantee: Roberto Mendonça Faria
• Support Opportunities: Research Projects - Thematic Grants