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Nanomaterials 2012, 2(4), 428-444; doi:10.3390/nano2040428
Article

Spontaneous Deposition of Prussian Blue on Multi-Walled Carbon Nanotubes and the Application in an Amperometric Biosensor

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Received: 16 October 2012; in revised form: 16 November 2012 / Accepted: 16 November 2012 / Published: 27 November 2012
(This article belongs to the Special Issue CNT based Nanomaterials)
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Abstract: A simple method has been developed for the spontaneous deposition of Prussian blue (PB) particles from a solution containing only ferricyanide ions onto conducting substrates such as indium tin oxide glass, glassy carbon disk and carbon nanotube (CNT) materials. Formation of PB deposits was confirmed by ultraviolet-visible absorption spectrometry and electrochemical techniques. The surface morphology of the PB particles deposited on the substrates was examined by atomic force microscopy and scanning electron microscopy. CNT/PB composite modified glassy carbon electrodes exhibited an electrocatalytic property for hydrogen peroxide reduction. These modified electrodes exhibited a high sensitivity for electrocatalytic reduction of hydrogen peroxide at −0.05 V (vs. Ag|AgCl), probably due to the synergistic effect of CNT with PB. Then, CNT/PB modified electrodes were further developed as amperometric glucose biosensors. These biosensors offered a linear response to glucose concentration from 0.1 to 0.9 mM with good selectivity, high sensitivity of 0.102 A M1 cm−2 and short response time (within 2 s) at a negative operation potential of −0.05 V (vs. Ag|AgCl). The detection limit was estimated to be 0.01 mM at a signal-to-noise ratio of 3.
Keywords: Prussian blue; spontaneous deposition; carbon nanotubes; glucose determination Prussian blue; spontaneous deposition; carbon nanotubes; glucose determination
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Yao, Y.; Bai, X.; Shiu, K.-K. Spontaneous Deposition of Prussian Blue on Multi-Walled Carbon Nanotubes and the Application in an Amperometric Biosensor. Nanomaterials 2012, 2, 428-444.

AMA Style

Yao Y, Bai X, Shiu K-K. Spontaneous Deposition of Prussian Blue on Multi-Walled Carbon Nanotubes and the Application in an Amperometric Biosensor. Nanomaterials. 2012; 2(4):428-444.

Chicago/Turabian Style

Yao, Yanli; Bai, Xiaoyun; Shiu, Kwok-Keung. 2012. "Spontaneous Deposition of Prussian Blue on Multi-Walled Carbon Nanotubes and the Application in an Amperometric Biosensor." Nanomaterials 2, no. 4: 428-444.


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