Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 11, Pages 4354-4362Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am201008n
Keywords
boron nitride nanotubes; polyaniline; platinum nanoparticles; glucose biosensor; acid stability; heat resistance
Funding
- National Natural Science Funds for Distinguished Young Scholars [51025211]
- National Nature Science Foundation of China [50872071, 50972079]
- Shandong Natural Science Fund for Distinguished Young Scholars [JQ200915]
- Nature Science Foundation of Shandong Province [Y2007F03, Y2008F26]
- Foundation of Outstanding Young Scientists in Shandong Province [2006BS04030]
- Tai Shan Scholar Foundation of Shandong Province
- Gong Guan Foundation of Shandong Province [2008GG10003019]
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A novel amperometric biosensor based on the BNNTs-Pani-Pt hybrids with Pt nanoparticle homogeneously decorated on polyaniline (Pani)-wrapped boron nitride nanotubes (BNNTs), was developed. It is shown that pi interactions take place between BNNTs and polyaniline (Pani) located at N atoms from BNNTs and C atoms from Pani, resulting in the water solubility for the Pani wrapped BNNTs hybrids. The developed glucose biosensor displayed high sensitivity and stability, good reproducibility, anti-interference ability, especially excellent acid stability and heat resistance. The resulted BNNTs-Pani-Pt hybrid amperometric glucose biosensor exhibited a fast response time (within 3 s) and a linear calibration range from 0.01 to 5.5 mM with a high sensitivity and low detection limit of 19.02 mA M-1 cm(-2) and 0.18 mu M glucose (S/N = 3). Surprisedly, the relative activity of the GC/BNNTs-Pani-Pt-GOD electrode keeps almost no change in a range from pH 3 to 7. Futhermore, the BNNTs-Pani-Pt hybrid biosensor maintains a high GOD enzymatic activity even at a relatively high temperature of 60 degrees C. This might be attributed to the effect of electrostatic field and hydrophobia of BNNTs. The unique acid stability and heat resistance of this sensor indicate great promising application in numerous industrial and biotechnological operations involving harsh conditions.
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