Carbon Nanotubes Based Glucose Needle-type Biosensor

Sensors

Jinyan Jia¹  Wenjun Guan¹  Minghao Sim¹  Yongquan Li¹ 

[1] Zhejiang University, College of Life Sciences, HangZhou 310027, P.R. China; E-mails:

关键词: Multiwall carbon nanotubes;    needle-type biosensor;    glucose;   

DOI  :  10.3390/s8031712

来源: mdpi

【 摘 要 】

A novel needle-type biosensor based on carbon nanotubes is reported. The biosensor was prepared by packing a mixture of multi-wall carbon nanotubes (MWCNTs), graphite powder and glucose oxidase (G_ox) freeze-dried powder into a glass capillary of 0.5 mm inner diameter. The resulting amperometric biosensor was characterized electrochemically using amperometry in the presence of hydrogen peroxide and in the presence of glucose. The glucose biosensor sensitivity was influenced by the glucose oxidase concentration within the MWCNTs mixture. The optimized glucose needle-type biosensor displayed better sensitivity and stability, and a detected range of up to 20 mM. Based on its favorable stability, the needle biosensor was first time used in real-time monitoring system as a kind of online glucose detector. The decay of current response is less than 10% after 24-hour continuous observation.

【 授权许可】

Unknown   
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