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Response of a Pt-polyyne membrane in surface acoustic wave sensors: experimental and theoretical approach (Articolo in rivista)

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Response of a Pt-polyyne membrane in surface acoustic wave sensors: experimental and theoretical approach (Articolo in rivista) (literal)

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Caliendo C. 1, Fratoddi I. 2, Russo M.V. 2, Lo Sterzo C. 3 (2003)
Response of a Pt-polyyne membrane in surface acoustic wave sensors: experimental and theoretical approach
in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
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Web of Science Categories: Physics, Applied Research Areas: Physics IDS Number: 563UP ISSN: 0003-6951 (literal)

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1 Institute of Acoustics, CNR, Via del Fosso del Cavaliere 100, 00133 Rome, Italy 2 Department of Chemistry, University of Rome La Sapienza, P. le A. Moro 5, 00185 Rome, Italy 3 Department of Chemistry, Inst. of Chem. of Orgmet. Compounds, University of Rome La Sapienza, P. le A. Moro 5, 00185 Rome, Ital (literal)

Titolo

Response of a Pt-polyyne membrane in surface acoustic wave sensors: experimental and theoretical approach (literal)

Abstract

A surface acoustic wave (SAW) sensor, based on a polymeric sensitive membrane, has been realized for sensor applications and materials characterization. A platinum-containing rigid-rod organometallic polymer [-Pt(PPh3)2(-CºC-pC6H2(2,5-OC16H33)2-CºC-)]n (Pt-P-HDOB), obtained by the reaction of cis-[Pt(PPh3)2Cl2] with 1,4-diethynyl-2,5-dihexadeciloxybenzene (HDOB) by means of the recently assessed Extended One Pot polymerization route, was here studied. The chemical structure and chain length of Pt-P-HDOB polymer were defined by spectroscopic techniques and Gel Permeation Chromatography (GPC) measurements. The acoustic characterization of the Pt-P-HDOB film was developed with the aid of the perturbation theory applied to different polymer-coated-piezoelectric substrates and the shear modulus of Pt-P-HDOB film have been estimated. A SAW delay line has been implemented on ZnO/Si substrate and a thin polymeric film has been spin-deposited on the device surface to realize a chemical sensor. The sensor has been exposed to different chemicals and its response has been measured for different chemicals concentrations. High sensitivity and reproducibility of the sensor response to relative humidity (R.H.) and methanol vapors were found. (literal)

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