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

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      , , *
      Nanomaterials
      MDPI
      Prussian blue, spontaneous deposition, carbon nanotubes, glucose determination

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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 M −1 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.

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          Most cited references65

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          Carbon-Nanotube Based Electrochemical Biosensors: A Review

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            Solution properties of single-walled carbon nanotubes

            Chen, Hamon, Hu (1998)
            Naked metallic and semiconducting single-walled carbon nanotubes (SWNTs) were dissolved in organic solutions by derivatization with thionychloride and octadecylamine. Both ionic (charge transfer) and covalent solution-phase chemistry with concomitant modulation of the SWNT band structure were demonstrated. Solution-phase near-infrared spectroscopy was used to study the effects of chemical modifications on the band gaps of the SWNTs. Reaction of soluble SWNTs with dichlorocarbene led to functionalization of the nanotube walls.
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              Prussian Blue and Its Analogues: Electrochemistry and Analytical Applications

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                Author and article information

                Journal
                Nanomaterials (Basel)
                Nanomaterials (Basel)
                nanomaterials
                Nanomaterials
                MDPI
                2079-4991
                27 November 2012
                December 2012
                : 2
                : 4
                : 428-444
                Affiliations
                Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong; Email: xli0207@ 123456sina.com (Y.Y.); 11466731@ 123456life.hkbu.edu.hk (X.B.)
                Author notes
                [* ]Author to whom correspondence should be addressed; Email: kkshiu@ 123456hkbu.edu.hk ; Tel.: +852-3411-7346; Fax: +852-3411-7348.
                Article
                nanomaterials-02-00428
                10.3390/nano2040428
                5304602
                49f7a53b-2740-4bcd-be0c-d5e28e6fba55
                © 2012 by the authors; licensee MDPI, Basel, Switzerland.

                This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

                History
                : 16 October 2012
                : 16 November 2012
                : 16 November 2012
                Categories
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                prussian blue,spontaneous deposition,carbon nanotubes,glucose determination

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