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Electrogenerated Chemiluminescence Ethanol Biosensor Based on Carbon Nanotube-Titania-Nafion Composite Film

✍ Scribed by Han Nim Choi; Sook Hyun Yoon; Young-Ku Lyu; Won-Yong Lee

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
193 KB
Volume
19
Category
Article
ISSN
1040-0397

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✦ Synopsis

Abstract

Mesoporous titania‐Nafion composite doped with carbon nanotube (CNT) has been used for the immobilization of tris(2,2′‐bipyridyl)ruthenium(II) (Ru(bpy)~3~^2+^) and alcohol dehydrogenase on an electrode surface to yield a highly sensitive and stable electrogenerated chemiluminescence (ECL) ethanol biosensor. The presence of CNT in the composite film increases not only the sensitivity of the ECL biosensor but also the long‐term stability of the biosensor. The present biosensor responds linearly to ethanol in the wide concentration ranges from 1.0×10^−5^ M to 1.0×10^−1^ M with a detection limit of 5.0×10^−6^ M (S/N=3). The present ECL ethanol biosensor exhibited higher ECL response compared to that obtained with the ECL biosensor based on the corresponding composite without CNT. The present CNT‐based ECL biosensor showed good long‐term stability with 75% of its initial activity retained after 2 weeks of storage in 50 mM phosphate buffer at pH 7.0.

📜 SIMILAR VOLUMES

Tris(2,2′-bipyridyl)ruthenium(II) Electr
Tris(2,2′-bipyridyl)ruthenium(II) Electrogenerated Chemiluminescence Sensor Based on Platinized Carbon Nanotube–Zirconia–Nafion Composite Films
✍ Sook Hyun Yoon; Jee Hoon Han; Byung Kun Kim; Han Nim Choi; Won-Yong Lee 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 347 KB

## Abstract Mesoporous films of platinized carbon nanotube–zirconia–Nafion composite have been used for the immobilization of tris(2,2′‐bipyridyl)ruthenium (II) (Ru(bpy)~3~^2+^) on an electrode surface to yield a solid‐state electrogenerated chemiluminescence (ECL) sensor. The composite films of Pt