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Investigators from RICE Target Fullerenes (Utilization of highly purified single wall carbon nanotubes dispersed in polymer thin films for an...

August 5, 2014



Investigators from RICE Target Fullerenes (Utilization of highly purified single wall carbon nanotubes dispersed in polymer thin films for an improved performance of an electrochemical glucose sensor)

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Fullerenes have been published. According to news reporting from Houston, Texas, by NewsRx journalists, research stated, "In this work we report the improved performance an electrochemical glucose sensor based on a glassy carbon electrode (GCE) that has been modified with highly purified single wall carbon nanotubes (SWCNTs) dispersed in polyethyleneimine (PEI), polyethylene glycol (PEG) and polypyrrole (PPy). The single wall carbon nanotubes were purified by both thermal and chemical oxidation to achieve maximum purity of similar to 98% with no damage to the tubes."

The news correspondents obtained a quote from the research from RICE, "The SWCNTs were then dispersed by sonication in three different organic polymers (1.0 mg/ml SWCNT in 1.0 mg/ml of organic polymer). The stable suspension was coated onto the GCE and electrochemical characterization was performed by Cyclic Voltammetry (CV) and Amperometry. The electroactive enzyme glucose oxidase (GOx) was immobilized on the surface of the GCE/(organic polymer-SWCNT) electrode. The amperometric detection of glucose was carried out at 0.7 V versus Ag/AgCl. The GCE/(SWCNT-PEI, PEG, PPY) gave a detection limit of 0.2633 mu M, 0.434 mu M, and 0.9617 mu M, and sensitivities of 02411 +/- 0.0033 mu A mM(-1), r(2) = 0.9984, 0.08164 +/- 0.001129 mu A mM(-1), r(2) = 0.9975, 0.04189 +/- 0.00087 mu A mM(-1), and r(2) = 0.9944 respectively and a response time of less than 5 s. The use of purified SWCNTs has several advantages, including fast electron transfer rate and stability in the immobilized enzyme."

According to the news reporters, the research concluded: "The significant enhancement of the SWCNT modified electrode as a glucose sensor can be attributed to the superior conductivity and large surface area of the well dispersed purified SWCNTs."

For more information on this research see: Utilization of highly purified single wall carbon nanotubes dispersed in polymer thin films for an improved performance of an electrochemical glucose sensor. Materials Science & Engineering C-Materials for Biological Applications, 2014;40():299-307. Materials Science & Engineering C-Materials for Biological Applications can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands (see also Fullerenes).

Our news journalists report that additional information may be obtained by contacting V. Goornavar, RICE Univ, Houston, TX 77251, United States. Additional authors for this research include R. Jeffers, S. Biradar and G.T. Ramesh.

Keywords for this news article include: Texas, Houston, Chemistry, Fullerenes, United States, Nanotechnology, Electrochemical, Carbon Nanotubes, Emerging Technologies, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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