Electronic Tongue Based on Nanostructured Hybrid Films of Gold Nanoparticles and Phthalocyanines for Milk Analysis

Author(s)

Mercante, Luiza A. ; Scagion, Vanessa P. ; Pavinatto, Adriana ; Sanfelice, Rafaela C. ; Mattoso, Luiz H. C. ; Correa, Daniel S.

• Document type: Journal article
• Source: Journal of Nanomaterials; v. 2015, p. 7-pg., 2015-01-01.

Abstract

The use of gold nanoparticles combined with other organic and inorganic materials for designing nanostructured films has demonstrated their versatility for various applications, including optoelectronic devices and chemical sensors. In this study, we reported the synthesis and characterization of gold nanoparticles stabilized with poly(allylamine hydrochloride) (Au@PAH NPs), as well as the capability of this material to form multilayer Layer-by-Layer (LbL) nanostructured films with metal tetrasulfonated phthalocyanines (MTsPc). Film growth was monitored by UV-Vis absorption spectroscopy, atomic force microscopy (AFM), and Fourier transform infrared spectroscopy (FTIR). Once LbL films have been applied as active layers in chemical sensors, Au@PAH/MTsPc and PAH/MTsPc LbL films were used in an electronic tongue system for milk analysis regarding fat content. The capacitance data were treated using Principal Component Analysis (PCA), revealing the role played by the gold nanoparticles on the LbL films electrical properties, enabling this kind of system to be used for analyzing complex matrices such as milk without any prior pretreatment. (AU)

• FAPESP's process: 14/16789-5 - Hybrid nanostructured materials based on conjugated polymers and metallic nanoparticles for sensor applications
• Grantee: Daniel Souza Corrêa
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/23880-3 - Development of polymeric nanostructures as a sensor platform for diagnosis of bacteria causing mastitis
• Grantee: Luiza Amim Mercante
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/26712-7 - Development of nanostructured biosensors for the detection of endocrine disruptors in aquaculture
• Grantee: Adriana Pavinatto da Costa
• Support Opportunities: Scholarships in Brazil - Post-Doctoral