Artículos de revistas
Detection of volatile organic compounds using a polythiophene derivative
Fecha
2010-05Registro en:
Physica Status Solidi A,Weinheim : Wiley-VCH Verlag,v. 207, n. 7, p. 1756-1759, July 2010
1862-6300
10.1002/pssa.200983723
Autor
Gonçalves, V. C.
Nunes, B. M.
Olivati, C. A.
Balogh, Debora Terezia
Institución
Resumen
Conjugated polymers have been subject of great interest in
the recent literature from both fundamental point of view
and applied science perspective. Among the several types
of conjugated polymers used in recent investigations, polythiophene
and its derivatives have attracted considerable
attention over the past 20 years due to their high mobility
and other remarkable solid-state properties. They have
potential applications in many fields, such as microelectronic
devices, catalysts, organic field-effect transistors, chemical
sensors, and biosensors. They have been studied as gas and
volatile organic compounds (VOCs) sensors using different
principles or transduction techniques, such as optical
absorption, conductivity, and capacitance measurements.
In this work, we report on the fabrication of gas sensors
based on a conducting polymer on an interdigitated gold
electrode. We use as active layer of the sensor a polythiophene
derivative: poly (3-hexylthiophene) (P3HT) and analyzed its
conductivity as response for exposure to dynamic flow of
saturated vapors of six VOCs [n-hexane, toluene, chloroform,
dichloromethane, methanol, and tetrahydrofuran (THF)].
Different responses were obtained upon exposure to all VOCs,
THF gave the higher response while methanol the lower
response. The influence