Title :
Application of tris(2-2´-bipyridyl)ruthenium(II)-Nafion-ormosil-modified electrode in selective sensing of dopamine
Author :
Chauhan, Dheeraj S. ; Pandey, Prem C.
Author_Institution :
Dept. of Appl. Chem., Banaras Hindu Univ., Varanasi, India
Abstract :
We report herein a novel Ruthenium bipyridyl-Nafion-ormosil composite material cast onto an ITO electrode and used for electrochemiluminescent (ECL) detection of dopamine. The modified electrodes are made using the homogeneous solution of [Ru(bpy)3]2+, Nafion® 117 and 3-glycidoxypropyltrimethoxysilane. The encapsulated [Ru(bpy)3]2+ showed catalyzed ECL response as compared to that of plain [Ru(bpy)3]2+-Nafion matrix. The new composite material (Rusystem) was further modulated by the introduction of gold nanoparticles within composite matrix. Quantitative relation between catalytic efficiency of [Ru(bpy)3]2+ and ECL yield has been recorded. The lowest detection limit of dopamine analysis was found to be < 0.1 ¿M.
Keywords :
biochemistry; biomedical electrodes; biosensors; chemiluminescence; electrochemical sensors; electroluminescence; organic compounds; 3-glycidoxypropyltrimethoxysilane; ITO electrode; [Ru(bpy)3]2+; catalytic efficiency; electrochemiluminescent detection; gold nanoparticles; ruthenium bipyridyl-Nafion-ormosil composite material; selective dopamine sensing; solutions; Biosensors; Chemistry; Composite materials; Electrodes; Electrokinetics; Indium tin oxide; Nanocomposites; Neurotransmitters; Organic inorganic hybrid materials; Sensor arrays;
Conference_Titel :
Sensors, 2009 IEEE
Conference_Location :
Christchurch
Print_ISBN :
978-1-4244-4548-6
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2009.5398577
