An electro-catalytic biosensor fabricated with Pt-Au nanoparticle-decorated titania nanotube array.
A Gold-Platinum nanoparticle-decorated titania nanotubular electrode is fabricated by electrochemically depositing Au and Pt nanoparticles onto a highly-oriented titania nanotube array. The prepared electrode, characterized by SEM and EDX, shows remarkably improved catalytic activities in the oxidation of hydrogen peroxide. By modifying the electrode with glucose oxidase (GOx) the resultant glucose biosensor exhibits a high sensitivity to glucose in the range of 0 to 1.8 mM with a response time of 3 s and detection limit of 0.1 mM.
Kang
Qing
Q
State Key Laboratory of Chemo/Biosensing and Chemometrics, Department of Chemistry, Hunan University, Changsha 410082, PR China.
Yang
Lixia
L
Cai
Qingyun
Q
D015374:Biosensing Techniques / Q000295:instrumentation*; D002384:Catalysis; D004566:Electrodes; D004800:Enzymes, Immobilized; D005947:Glucose / Q000032:analysis; D005949:Glucose Oxidase / Q000378:metabolism; D006046:Gold; D006861:Hydrogen Peroxide / Q000737:chemistry; D053768:Metal Nanoparticles; D043942:Nanotubes / Q000737:chemistry*; D010084:Oxidation-Reduction; D010984:Platinum; D014025:Titanium
D004800:Enzymes, Immobilized; C009495:titanium dioxide; D010984:Platinum; D006046:Gold; D006861:Hydrogen Peroxide; D014025:Titanium; D005949:Glucose Oxidase; D005947:Glucose