Tracing paper substrate used for development of interdigitated graphite electrode and its application as humidity sensor

Author(s)

Steffens, Clarice ^{[1, 2]} ; Manzoli, Alexandra ^[1] ; Paschoalin, Rafaella Takehara ^[1] ; Tiggemann, Lidia ^[2] ; Steffens, Juliana ^[2] ; Teixeira, Elisangela ^[1] ; de Paula Herrmann, Paulo Sergio ^{[1, 3]}

Affiliation

^[1] Embrapa Instrumentat, Natl Nanotechnol Lab Agribusiness, Sao Carlos, SP - Brazil

^[2] URI Campus Erechim, Dept Food Engn, Erechim, RS - Brazil

^[3] Forschungszentrum Julich, Embrapa Labex Europe Germany, Inst Biogeosci, D-52428 Julich, Nwf - Germany

• Document type: Journal article
• Source: Synthetic Metals; v. 183, p. 36-39, NOV 1 2013.
• Web of Science Citations: 9

Abstract

In this paper tracing paper was used as the support on which interdigitated graphite electrodes (IGE) were deposited by a line patterning technique (LPT). This substrate was characterized before and after the patterning procedure by thermogravimetric analysis, atomic force microscopy (AFM) and field emission scanning electron microscopy (FE-SEM). The performance of the IGEs prepared by LPT as humidity sensors were evaluated in an electronic nose system, under different humidities (in triplicate) at room pressure and temperature in a closed chamber. The relative humidity (RH) in the chamber was varied from 20 to 70% using dry nitrogen as a carrier gas, which was passed through a bubbler containing water to generate humidity. Slight changes in the morphology of the tracing paper were noted after the processes used to produce the LEG, but these changes did not prevent these sensors performing well under varied environmental conditions, as part of an electronic nose system to detect humidity. The results showed that humidity sensors were sensitive (215% +/- 1.02) and provided good repeatability and reversibility (99% +/- 0.01) after several cycles of exposure to RH. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 09/08244-0 - Development of functionalized microcantilever with conductive polymers for detection of chemical vapors
• Grantee: Clarice Steffens
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 07/05089-9 - Development of nanobiosensors using atomic force spectroscopy: application for detecting pesticides
• Grantee: Fabio de Lima Leite
• Support Opportunities: Research Grants - Young Investigators Grants