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Investigation of the selectivity properties of metalloporphyrines self-assembled-monolayers on QMB and FET transducers
University of Rome Tor Vergata, via del Politecnico 1, 00133 Roma, Italy.
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, Faculty of Science & Engineering.
University of Rome Tor Vergata, via del Politecnico 1, 00133 Roma, Italy.
University of Rome Tor Vergata, via del Politecnico 1, 00133 Roma, Italy.
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2006 (English)In: Proc Eurosensors XX, 2006, T1A-P11Conference paper, Poster (Refereed)
Abstract [en]

Progresses of synthetic chemistry methodologies have allowed the preparation of a great variety of artificial receptors that are particularly appealing for chemical sensor development. In this paper, we investigate and compare the properties of gas sensors based on two types of devices, quartz microbalances (QMBs) and field effect transistors (FETs), which give the means to exploit the molecular recognition events occurring in non-conductive sensing layers formed by a thiol-modified cobalt tetraphenylporphyrin (CoTPPSH). Since QMB is sensitive to mass and FET is sensitive to electric dipoles, the resulting sensors are expected to exhibit different sensitivities and selectivities, although both based on the same sensing layer. In particular we show that the high sensitivity of CoTPPSH-coated FETs towards CO and NO is a consequence of the significant CoTPPSH electric dipole change after the gas coordination to the metal centre.

Place, publisher, year, edition, pages
2006. T1A-P11
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-129209OAI: oai:DiVA.org:liu-129209DiVA: diva2:936211
Conference
Eurosensors XX, Göteborg, Sweden, September 18-20, 2006
Available from: 2016-06-13 Created: 2016-06-13 Last updated: 2016-06-23

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Buchholt, KristinaLundström, IngemarLloyd Spetz, Anita
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Applied PhysicsFaculty of Science & Engineering
Analytical Chemistry

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