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      Electrocatalytic Detection of Amitrole on the Multi-Walled Carbon Nanotube – Iron (II) tetra-aminophthalocyanine Platform

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          Abstract

          It is shown that iron(II) tetra-aminophthalocyanine complex electropolymerized onto a multi-walled carbon nanotube-modified basal plane pyrolytic graphite electrode greatly enhanced the electrocatalytic detetion of amitrole (a toxic herbicide), resulting in a very low detection limit (0.5 nM) and excellent sensitivity of 8.80±0.44 μA/nM, compared to any known work reported so far. The electrocatalytic detection of amitrole at this electrode occurred at less positive potential (∼0.3 V vs Ag|ACl) and also revealed a typical coupled chemical reaction. The mechanism for this response is proposed. The electrode gave satisfactory selectivity to amitrole in the presence of other potential interfering pesticides in aqueous solutions.

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          Fullerene Pipes

          J. Liu (1998)
          Article 0 comments Cited 375 times – based on 0 reviews     Review now
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            Fullerene pipes

            Kathryn Boul, F Shon, C Rinzler … (1998)
            Single-wall fullerene nanotubes were converted from nearly endless, highly tangled ropes into short, open-ended pipes that behave as individual macromolecules. Raw nanotube material was purified in large batches, and the ropes were cut into 100- to 300-nanometer lengths. The resulting pieces formed a stable colloidal suspension in water with the help of surfactants. These suspensions permit a variety of manipulations, such as sorting by length, derivatization, and tethering to gold surfaces.
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              Carbon Nanotubes for Electronic and Electrochemical Detection of Biomolecules.

              Fotios Papadimitrakopoulos, James F. Rusling, Alice Kim (2007)
              The unique electronic and optical properties of carbon nanotubes, in conjunction with their size and mechanically robust nature, make these nanomaterials crucial to the development of next-generation biosensing platforms. In this Review, we present recent innovations in carbon nanotube-assisted biosensing technologies, such as DNA-hybridization, protein-binding, antibody-antigen and aptamers. Following a brief introduction on the diameter- and chirality-derived electronic characteristics of single-walled carbon nanotubes, the discussion is focused on the two major schemes for electronic biodetection, namely biotransistor- and electrochemistry-based sensors. Key fabrication methodologies are contrasted in light of device operation and performance, along with strategies for amplifying the signal while minimizing nonspecific binding. This Review is concluded with a perspective on future optimization based on array integration as well as exercising a better control in nanotube structure and biomolecular integration.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Sensors (Basel)
                Journal ID (iso-abbrev): Sensors (Basel)
                Title: Sensors (Basel, Switzerland)
                Publisher: Molecular Diversity Preservation International (MDPI)
                ISSN (Electronic): 1424-8220
                Publication date Collection: August 2008
                Publication date (Electronic): 27 August 2008
                Volume: 8
                Issue: 8
                Pages: 5096-5105
                Affiliations
                [1 ] Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa; E-Mail: msiswana@ 123456wsu.ac.za (M.S.); T.Nyokong@ 123456ru.ac.za (T.N)
                [2 ] Molecular and Nanomaterials Electrochemistry Laboratory, Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa
                Author notes
                [* ] Author to whom correspondence should be addressed; E-mail: kenneth.ozoemena@ 123456up.ac.za ; Tel.: +27-12-420-2515; Fax: +27-12-420-4687
                Article
                Publisher ID: sensors-08-05096
                DOI: 10.3390/s8085096
                PMC ID: 3705490
                SO-VID: cd3b58f1-97f9-4eb2-87da-9db5c6e228b3
                Copyright © © 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.
                License:

                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
                Date received : 21 May 2008
                Date revision received : 09 June 2008
                Date accepted : 11 June 2008
                Categories
                Subject: Article

                ScienceOpen disciplines: Biomedical engineering
                Keywords: multi walled carbon nanotubes,electropolymerization,basal plane pyrolytic graphite electrode,tetra-aminophthalocyanine,amitrole
                Data availability:
                ScienceOpen disciplines: Biomedical engineering
                Keywords: multi walled carbon nanotubes, electropolymerization, basal plane pyrolytic graphite electrode, tetra-aminophthalocyanine, amitrole

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