title: Electrochemical detection of celecoxib at a polyaniline grafted multiwall carbon nanotubes modified electrode.
abstract: A modified electrode is fabricated by grafting polyaniline (PANI) chains onto multiwall carbon nanotubes (MWNTs) and utilized for the adsorptive reduction of celecoxib (CEL). PANI-g-MWNTs modified electrode appreciably enhances the sensitive detection of CEL in extremely lower concentrations (1x10(-11)M). Square wave stripping voltammogram (SWSV) shows a reduction peak at -1.08V with a high peak current for SW frequency of 100Hz, amplitude of 25mV and step height of 6mV. The high surface area of PANI-g-MWNTs is effectively utilized for the adsorption of CEL to preconcentrate at the electrode. The PANI chains covalently linked to MWNTs mediate the electron transfer processes. The present finding open-up the scope for extending on the use of other conducting polymers grafted MWNTs modified electrodes for the detection of compounds that do not have surface-active properties at conventional electrodes.
authors.affiliation: Department of Chemistry Graduate School, Kyungpook National University, Daegu 702-701, South Korea.
authors.forename: Kalayil Manian
authors.initials: KM
authors.lastname: Manesh
authors.forename: Padmanabhan
authors.initials: P
authors.lastname: Santhosh
authors.forename: Shanmugasundaram
authors.initials: S
authors.lastname: Komathi
authors.forename: Nam Hee
authors.initials: NH
authors.lastname: Kim
authors.forename: Jong Wook
authors.initials: JW
authors.lastname: Park
authors.forename: Anantha Iyengar
authors.initials: AI
authors.lastname: Gopalan
authors.forename: Kwang-Pill
authors.initials: KP
authors.lastname: Lee