Development of molecularly imprinted polymers based sensors to detect MIB and GEO at urban supply water

• Grant number: 13/19421-6
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: February 01, 2014
• End date: September 18, 2017
• Field of knowledge: Engineering - Electrical Engineering - Electrical Materials
• Principal Investigator: Fernando Josepetti Fonseca
• Grantee: Guilherme de Souza Braga
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 15/05359-2 - Development of molecularly imprinted polymers based sensors to detect MIB and GSM at water, BE.EP.PD

Abstract

This work aims to develop specific sensors based on molecularly imprinted polymers (MIPs) to detect 2-methylisoborneol (MIB) and geosmin (GEO) at real water samples, i.e., samples collected from Guarapiranga reservoir and from a water treatment plant from SABESP (Companhia de Saneamento Básico do Estado de São Paulo). These compounds are sub-products from algae decomposition and depending on the concentration they can be toxic, otherwise they can cause unpleasant taste and odor (earthy-musty) to the water distributed to the population. The sensor that is going to be used at this work will be composed by an ITO or gold electrode covered with the MIP and will be interrogated under alternating current and impedance measurements. One sensor without the imprinting will be deposited the same manner as the MIP to evaluate sensors sensitivity and the imprinting efficiency. Additionally, sensor's selectivity will be evaluated measuring water samples containing compounds with similar molecular structure to the target compounds, such as isoborneol. In addition, sensor's lifetime will be evaluated, i.e., for how long they can be used with confiability.

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CAVALLARI, MARCO R.; BRAGA, GUILHERME S.; DA SILVA, MAURO F. P.; IZQUIERDO, JOSE E. E.; PATERNO, LEONARDO G.; DIRANI, ELY A. T.; KYMISSIS, IOANNIS; FONSECA, FERNANDO J.. A Hybrid Electronic Nose and Tongue for the Detection of Ketones: Improved Sensor Orthogonality Using Graphene Oxide-Based Detectors. IEEE SENSORS JOURNAL, v. 17, n. 7, p. 1971-1980, APR 1 2017. (15/08566-9, 13/19421-6, 13/19420-0, 11/17184-1, 09/05589-7, 08/57706-4)

SANTOS, G.; BRAGA, G. S.; CAMBAUVA, I; FONSECA, F. J.; IEEE. Electrical characterization of bulk heterojunction organic solar cells using PAni:PSS Layer-by-Layer films. 2019 34TH SYMPOSIUM ON MICROELECTRONICS TECHNOLOGY AND DEVICES (SBMICRO 2019), v. N/A, p. 3-pg., 2019-01-01. (09/05589-7, 08/57706-4, 13/19421-6)

BRAGA, GUILHERME S.; LIEBERZEIT, PETER A.; FONSECA, FERNANDO J.; IEEE. SELECTIVE CHEMICAL SENSOR BASED ON MOLECULARLY IMPRINTED POLYMER TO DETECT ISOBORNEOL IN AQUEOUS SAMPLES. 2017 ICOCS/IEEE INTERNATIONAL SYMPOSIUM ON OLFACTION AND ELECTRONIC NOSE (ISOEN 2017), v. N/A, p. 3-pg., 2017-01-01. (13/19421-6)

BRAGA, GUILHERME S.; FONSECA, FERNANDO J.; IEEE. MOLECULARLY IMPRINTED SENSOR FOR ISOBORNEOL BASED ON MULTILAYERED THIN FILMS OF IMPRINTED TIO2 NANOPARTICLES. 2017 ICOCS/IEEE INTERNATIONAL SYMPOSIUM ON OLFACTION AND ELECTRONIC NOSE (ISOEN 2017), v. N/A, p. 3-pg., 2017-01-01. (13/19421-6)