Synthesis and Characterization of High Integrity Solid-Contact Polymeric Ion Sensors.
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.
De Marco
Roland
R
Nanochemistry Research Institute, Department of Applied Chemistry, Curtin University of Technology, GPO Box U1987, Perth, Western Australia, 6845, AUSTRALIA.
Jee
Elaine
E
Prince
Kathryn
K
Pretsch
Ernö
E
Bakker
Eric
E
Chem Rev. 2008 Feb;108(2):329-51
18189426
Anal Chem. 2006 Feb 15;78(4):1318-22
16478128
Anal Chem. 1999 Nov 1;71(21):4932-7
21662838
J Am Chem Soc. 2006 Oct 25;128(42):13676-7
17044681
Chem Rev. 1997 Dec 18;97(8):3083-3132
11851486
J Gen Physiol. 1990 Dec;96(6):1247-69
1962815
J Am Chem Soc. 2006 Jun 28;128(25):8154-5
16787077
J Dairy Res. 2003 May;70(2):241-3
12800880
Anal Chem. 1999 Jun 15;71(12):328R-332R
10384789
Anal Chem. 2007 Jul 1;79(13):5107-10
17530777
Anal Bioanal Chem. 2004 Sep;380(1):7-14
15309365
Phys Chem Chem Phys. 2008 Jan 7;10(1):73-6
18075683
Anal Chem. 2004 Nov 1;76(21):6410-8
15516135
Anal Chem. 2008 Sep 1;80(17):6731-40
18671410
Angew Chem Int Ed Engl. 2007;46(30):5660-8
17457791