MOLECULARLY IMPRINTED SENSOR FOR ISOBORNEOL BASED ON MULTILAYERED THIN FILMS OF IMPRINTED TIO2 NANOPARTICLES

Author(s)

Braga, Guilherme S. ; Fonseca, Fernando J. ; IEEE

• Document type: Journal article
• Source: 2017 ICOCS/IEEE INTERNATIONAL SYMPOSIUM ON OLFACTION AND ELECTRONIC NOSE (ISOEN 2017); v. N/A, p. 3-pg., 2017-01-01.

Abstract

In this paper we describe the development of a novel molecularly imprinted sensor (MIS) for detection of isoborneol (ISO) in aqueous solutions. The MIS device consisted of an interdigitated microelectrode coated with a multilayered thin film of TiO2 nanoparticles and sodium sulfonated polystyrene (np-Ti02/PSS) assembled via electrostatic layer-by-layer. Isoborneol was previously imprinted within np-Ti02 that was used in the MIS assembly. Kinetics of imprinted and non-imprinted matrix were evaluated by UV-vis spectroscopy. Time dependence on adsorption was only noted after the deposition of the second bilayer, whereas for the first one almost the same amount of material was adsorbed, regardless the immersion time. Also, it was observed that the amount of np-Ti02 deposited onto the microelectrodes increases linearly with the number of npTi02/PSS bilayers. Moreover, pre-coating the microelectrodes enhances np-Ti02 adhesion. (AU)

• FAPESP's process: 13/19421-6 - Development of molecularly imprinted polymers based sensors to detect MIB and GEO at urban supply water
• Grantee: Guilherme de Souza Braga
• Support Opportunities: Scholarships in Brazil - Post-Doctoral