An electrochemical glucose sensor from an organically modified nanocomposite of viologen and TiO2.
An organically modified TiO2 nanocomposite was explored for glucose detection. Bis-Butyl viologen (BBV) was mixed with TiO2 nanoparticles to generate highly dispersed nanocomposite solution, which provided organically modified nanocomposite film of TiO2 (BBV-TiO2). A transistor type sensor was fabricated using the BBV-TiO2 film and platinum gate electrode. The BBV-TiO2 nanocomposite sensor showed higher sensitivity to glucose sensing in low concentration region compared to that of TiO2 sensor. This result was ascribed to facilitated electron transport by the adsorbed viologen molecules on TiO2 nanoparticles, where viologen molecules act as an electron transfer mediator between enzyme and TiO2.
Department of Chemical and Biomolecular Engineering, Yonsei University 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea.
Yuna
Y
Kim
George G
GG
Malliaras
Christopher K
CK
Ober
Eunkyoung
E
Kim
D055664:Electrochemical Techniques / Q000295:instrumentation* / Q000379:methods; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D018625:Microscopy, Atomic Force; D053761:Nanocomposites / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*; D014755:Viologens / Q000737:chemistry*
D014755:Viologens; C009495:titanium dioxide; D014025:Titanium; D005947:Glucose