title: A selective iodide ion sensor electrode based on functionalized ZnO nanotubes.
abstract: In this research work, ZnO nanotubes were fabricated on a gold coated glass substrate through chemical etching by the aqueous chemical growth method. For the first time a nanostructure-based iodide ion selective electrode was developed. The ZnO nanotubes were functionalized with miconazole ion exchanger and the electromotive force (EMF) was measured by the potentiometric method. The iodide ion sensor exhibited a linear response over a wide range of concentrations (1 × 10-6 to 1 × 10-1 M) and excellent sensitivity  of -62 ± 1 mV/decade. The detection limit of the proposed sensor was found to be 5 × 10-7 M. The effects of pH, temperature, additive, plasticizer and stabilizer on the potential response of iodide ion selective electrode were also studied. The proposed iodide ion sensor demonstrated a fast response time of less than 5 s and high selectivity against common organic and the inorganic anions. All the obtained results revealed that the iodide ion sensor based on functionalized ZnO nanotubes may be used for the detection of iodide ion in environmental water samples, pharmaceutical products and other real samples.
authors: Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden. zafar.hussain.ibupoto@liu.se
authors: Zafar Hussain
authors: ZH
authors: Ibupoto
authors: Kimleang
authors: K
authors: Khun
authors: Magnus
authors: M
authors: Willander
references: Langmuir. 2006 May 23;22(11):4890-5
references: 16700567
references: IEEE Trans Biomed Eng. 2006 Jul;53(7):1401-8
references: 16830944
references: Science. 2006 Apr 14;312(5771):242-6
references: 16614215
references: Talanta. 2005 Feb 15;65(3):756-61
references: 18969864
references: Talanta. 2005 Mar 31;66(1):130-5
references: 18969972
references: Anal Chem. 1988 Jan 15;60(2):185-8
references: 3348481
references: Anal Chem. 1989 Mar 15;61(6):566-70
references: 2729591
references: J Nanosci Nanotechnol. 2005 Nov;5(11):1904-9
references: 16433429
references: Talanta. 2004 May 28;63(2):339-43
references: 18969437
references: Nano Lett. 2006 Aug;6(8):1719-22
references: 16895362
references: Anal Bioanal Chem. 2004 Feb;378(3):816-21
references: 14689154
references: Anal Sci. 2005 Dec;21(12):1533-5
references: 16379401
references: Anal Chem. 1991 Dec 15;63(24):2970-3
references: 1789457
references: Anal Sci. 2005 May;21(5):525-9
references: 15913141