Disposable and flexible electrochemical sensor made by recyclable material and low cost conductive ink

Author(s)

de Araujo Andreotti, Isabela Aparecida ^{[1, 2]} ; Orzari, Luiz Otavio ^[1] ; Camargo, Jessica Rocha ^[1] ; Faria, Ronaldo Censi ^[2] ; Marcolino-Junior, Luiz Humberto ^[3] ; Bergarnini, Marcio Fernando ^[3] ; Gatti, Alexandre ^[4] ; Janegitz, Bruno C. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil

^[2] Univ Fed Sao Carlos, Ctr Exact Sci & Technol, BR-13560000 Sao Carlos, SP - Brazil

^[3] Univ Fed Parana, Dept Chem, BR-81531980 Curitiba, Parana - Brazil

^[4] FlackTek Inc, BR-13574290 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 840, p. 109-116, MAY 1 2019.
• Web of Science Citations: 4

Abstract

Disposable electrochemical sensors by using recyclable materials are an interesting alternative to produce electrochemical sensors with an extreme low cost. In addition, the screen-printing technique has been widely used to propose electrochemical devices with new conductive inks for different applications. In this context, we develop a disposable eco-friend sensor with relative cost low and easy production. A conductive ink was produced with nail polish and graphite powder. As a sensor substrate, we reuse polyethylene terephthalate (PET) from drink bottles. The characterizations of the proposed electrode were performed by using scanning electron microscopy, infrared microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The determination of hydroquinone (HQ), epinephrine (EP) and serotonin (5-HT) were chosen as proof of concept. Using square wave voltammetry, for HQ, the PET sensor showed a linear response in the concentration range of 5.0 to 100 mu mol L-1 with a detection limit (LOD) of 0.01 mu mol L-1. Differential pulse voltammetry was applied for EP and 5-HT detection, and the proposed electrode presented linear response in the range of 5.0 to 100 mu mol L-1 and 1.0 to 50 mu mol L-1 and LODs of 0.3 and 0.1 mu mol L-1 for EP and 5-HT, respectively. Then, the disposable PET sensor was applied in the determination of HQ in environmental and pharmaceutical samples and, EP and 5-HT in biological samples. The proposed electrode is simple to prepare and can be easily used for electrochemical sensing and biosensing. (AU)

• FAPESP's process: 17/21898-6 - New conductive devices for application in electrochemical sensing and biosensing
• Grantee: Bruno Campos Janegitz
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/12697-4 - Nanostructured sensors modified with graphene and tapioca for determination of phenolics compounds and nitrogenous bases
• Grantee: Luiz Otávio Orzari
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 18/02162-1 - Disposable sensors using waterproof paper and graphite conductive ink for the detection of pharmaceutical interest analyses
• Grantee: Jéssica Rocha Camargo
• Support Opportunities: Scholarships in Brazil - Scientific Initiation