Influence of conjugated polymers in biossensor for urea detection

• Grant number: 20/04427-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2020
• End date: October 20, 2021
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Laura Oliveira Péres Philadelphi
• Grantee: Cléber Gomes de Jesus
• Host Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil

Abstract

The study and development of urea biosensors are extremely important for applications such as medical or environmental. However, the non-immobilization of the pure enzyme becomes the device unviable. In this sense, the use of a conjugated polymer in the formation of biosensors is essential, since the polymer behaves like a matrix, enabling an enzymatic immobilization. However, little is known about the function of this polymer and its influence on enzyme activity. Thus, understanding the interaction between these polymeric materials and enzymes may be the key to the formation of a more efficient and sensitive biosensor. Thus, the present work proposes to analyze and research biosensors for urea detection, using several conjugated polymers as a matrix. The polymers to be used in this work are of the class poly-p-phenylene (PPP), poly (p-phenylene vinylene) (PPV), polyfluorene and polythiophene. These materials will be synthesized and characterized to prove their structure (infrared, nuclear magnetic resonance (NMR)) and to understand their characteristics (visible ultraviolet (UV-Vis), fluorescence, thermogravimetry). The films will be formed by spin coating and adjust to the conditions and prepare the films such as speed, rotation time and volume, as well as the number of variations that will be applied. The project also calculates the Michaelis-Menten constant (KM) as well as the capacity of the enzymatic analysis for each polymer. The results will be compared with each other and with what already exists in the literature.

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

DE JESUS, CLEBER GOMES; RODRIGUES, REBECA DA ROCHA; CASELI, LUCIANO; PERES, LAURA OLIVEIRA. Conducting polymers modulating the catalytic activity of urease in thin composite films. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v. 654, p. 7-pg., 2022-09-13. (20/04427-2, 19/03239-0, 14/50869-6, 18/22214-6)

DE JESUS, CLEBER GOMES; RODRIGUES, REBECA DA ROCHA; DA SILVA, CARLOS ALEXANDRE MOREIRA; PERES, LAURA OLIVEIRA. Artificial neural networks in the modeling of the catalytic activity of a biosensor composed of conjugated polymers and urease. ANALYTICAL AND BIOANALYTICAL CHEMISTRY, v. 416, n. 5, p. 11-pg., 2024-01-05. (20/04427-2, 14/50869-6)