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Plasma Deposited Porphyrin/Phthalocyanine Films as Promising Optical Gas Sensing Materials

Published online by Cambridge University Press:  01 February 2011

Gianluigi Maggioni ,
Michele Tonezzer ,
Sara Carturan ,
Alberto Quaranta ,
Katerina Severova  and
Gianantonio Della Mea
Gianluigi Maggioni
Affiliation:
maggioni@lnl.infn.it, University of Padua, LNL-INFN, Viale dell'Università, 2, Legnaro (PD), I-35020, Italy
Michele Tonezzer
Affiliation:
tonezzer@lnl.infn.it, LNL-INFN, Legnaro (PD), I-35020, Italy
Sara Carturan
Affiliation:
carturan@lnl.infn.it, LNL-INFN, University of Padua c/o, Viale dell'Università, 2, Legnaro (PD), I-35020, Italy
Alberto Quaranta
Affiliation:
quaranta@ing.unitn.it, University of Trento, DIMTI, Trento, I-38050, Italy
Katerina Severova
Affiliation:
severova@fch.vutbr.cz, Brno University of Technology, Institute of Physical and Applied Chemistry, Brno, 61200, Czech Republic
Gianantonio Della Mea
Affiliation:
dellamea@lnl.infn.it, University of Trento, DIMTI, Trento, I-38050, Italy
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Abstract

5,10,15,20 meso-tetraphenyl porphyrin (H2TPP) and copper phthalocyanine (CuPc) films have been deposited by means of a recently developed plasma based technique named glow discharge induced sublimation (GDS). The two macrocycles have been deposited by vacuum evaporation (VE) and H2TPP by spin coating (SPIN) as well for comparison. The physical properties of the films have been characterized by means of scanning electron microscopy (SEM) and nitrogen physisorption measurements. SEM images and physisorption isotherms highlight both the much higher surface roughness and specific surface area of GDS samples with respect to the VE and SPIN ones. Optical sensing measurements, performed in differently concentrated ethyl alcohol atmospheres, highlight that GDS samples yield much higher response intensities than SPIN and VE films, short response times and complete recovery.

Keywords

plasma depositionopticalsensor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1010: Symposium V – Functional Materials for Chemical and Biochemical Sensors , 2007 , 1010-V07-02
Copyright
Copyright © Materials Research Society 2007

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References

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