TY - JOUR
T1 - ZnO nanotube arrays as biosensors for glucose
AU - Yang, Kun
AU - She, Guang-Wei
AU - Wang, Hui
AU - Ou, Xue-Mei
AU - Zhang, Xiao-Hong
AU - Lee, Chun-Sing
AU - Lee, Shuit-Tong
PY - 2009
Y1 - 2009
N2 - Highly oriented single-crystal ZnO nanotube (ZNT) arrays were prepared by a two-step electrochemical/chemical process on indium-doped tin oxide (ITO) coated glass in an aqueous solution. The prepared ZNT arrays were further used as a working electrode to fabricate an enzyme-based glucose biosensor through immobilizing glucose oxidase in conjunction with a Nafion coating. The present ZNT arrays-based biosensor exhibits high sensitivity of 30.85 μA cm -2 mM-1 at an applied potential of +0.8 V vs. SCE, wide linear calibration ranges from 10 μM to 4.2 mM, and a low limit of detection (LOD) at 10 μM (measured) for sensing of glucose. The apparent Michaelis-Menten constant KMapp was calculated to be 2.59 mM, indicating a higher bioactivity for the biosensor. © 2009 American Chemical Society.
AB - Highly oriented single-crystal ZnO nanotube (ZNT) arrays were prepared by a two-step electrochemical/chemical process on indium-doped tin oxide (ITO) coated glass in an aqueous solution. The prepared ZNT arrays were further used as a working electrode to fabricate an enzyme-based glucose biosensor through immobilizing glucose oxidase in conjunction with a Nafion coating. The present ZNT arrays-based biosensor exhibits high sensitivity of 30.85 μA cm -2 mM-1 at an applied potential of +0.8 V vs. SCE, wide linear calibration ranges from 10 μM to 4.2 mM, and a low limit of detection (LOD) at 10 μM (measured) for sensing of glucose. The apparent Michaelis-Menten constant KMapp was calculated to be 2.59 mM, indicating a higher bioactivity for the biosensor. © 2009 American Chemical Society.
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U2 - 10.1021/jp901894j
DO - 10.1021/jp901894j
M3 - RGC 21 - Publication in refereed journal
SN - 1932-7447
VL - 113
SP - 20169
EP - 20172
JO - The Journal of Physical Chemistry C
JF - The Journal of Physical Chemistry C
IS - 47
ER -