title: Synthesis and Characterization of High Integrity Solid-Contact Polymeric Ion Sensors.
abstract: High integrity solid-contact (SC) polymeric ion sensors have been produced by using spin casting and electropolymerization techniques in the preparation of the SC employing the conductive polymer, poly(3-octylthiophene) [POT]. The physical and chemical integrity of the POT SCs have been evaluated using scanning electron microscopy (SEM), atomic force microscopy (AFM), secondary ion mass spectrometry (SIMS) and X-ray photoelectron spectroscopy (XPS). Furthermore, the electrochemical stability of SC polymeric ion sensors has been investigated using electrochemical impedance spectroscopy (EIS). The results of this study demonstrate that electropolymerization and spin casting methods also comprising annealing of the synthesized SC film are capable of producing SCs that are relatively free of imperfections such as pores and pinholes. This leads to electrochemically stable and robust polymeric ion sensors where the SC/sensor interface is resistant to the formation of a detrimental water layer that normally gives rise to spurious ion fluxes and a degradation in the sensitivity and selectivity of the SC polymeric ion sensor.
authors.affiliation: Nanochemistry Research Institute, Department of Applied Chemistry, Curtin University of Technology, GPO Box U1987, Perth, Western Australia, 6845, AUSTRALIA.
authors.forename: Roland
authors.initials: R
authors.lastname: De Marco
authors.forename: Elaine
authors.initials: E
authors.lastname: Jee
authors.forename: Kathryn
authors.initials: K
authors.lastname: Prince
authors.forename: Ernö
authors.initials: E
authors.lastname: Pretsch
authors.forename: Eric
authors.initials: E
authors.lastname: Bakker
references.citation: Chem Rev. 2008 Feb;108(2):329-51
references.pmid: 18189426
references.citation: Anal Chem. 2006 Feb 15;78(4):1318-22
references.pmid: 16478128
references.citation: Anal Chem. 1999 Nov 1;71(21):4932-7
references.pmid: 21662838
references.citation: J Am Chem Soc. 2006 Oct 25;128(42):13676-7
references.pmid: 17044681
references.citation: Chem Rev. 1997 Dec 18;97(8):3083-3132
references.pmid: 11851486
references.citation: J Gen Physiol. 1990 Dec;96(6):1247-69
references.pmid: 1962815
references.citation: J Am Chem Soc. 2006 Jun 28;128(25):8154-5
references.pmid: 16787077
references.citation: J Dairy Res. 2003 May;70(2):241-3
references.pmid: 12800880
references.citation: Anal Chem. 1999 Jun 15;71(12):328R-332R
references.pmid: 10384789
references.citation: Anal Chem. 2007 Jul 1;79(13):5107-10
references.pmid: 17530777
references.citation: Anal Bioanal Chem. 2004 Sep;380(1):7-14
references.pmid: 15309365
references.citation: Phys Chem Chem Phys. 2008 Jan 7;10(1):73-6
references.pmid: 18075683
references.citation: Anal Chem. 2004 Nov 1;76(21):6410-8
references.pmid: 15516135
references.citation: Anal Chem. 2008 Sep 1;80(17):6731-40
references.pmid: 18671410
references.citation: Angew Chem Int Ed Engl. 2007;46(30):5660-8
references.pmid: 17457791