What amount of metallic impurities in carbon nanotubes is small enough not to dominate their redox properties?

被引：125

作者：

Pumera, Martin ^{[1
]}

Miyahara, Yuji

机构：

[1] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan

来源：

NANOSCALE | 2009年 / 1卷 / 02期

关键词：

PLANE PYROLYTIC-GRAPHITE; MODIFIED ELECTRODES; IRON; NANOPARTICLES; VOLTAMMETRY; ELECTROCHEMISTRY; ELECTROCATALYSIS; BIOAVAILABILITY; COMPOSITES; PARTICLES;

D O I：

10.1039/b9nr00071b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

As carbon nanotubes become a part of everyday life, the paramount questions about then toxicity persist While it has been proven that a significant part of the toxicity of carbon nanotubes is due to the redox activity of the residual metallic impurities present within them, there is still no response to the fundamental question of where the borderline is that would render the impurities 'redox invisible' Herein we investigate the electrochemical response of carbon nanotubes containing different amounts of impurities towards the reduction of an important biomarker, hydrogen peroxide, and the oxidation of an important impurity marker, hydrazine We found that the borderline between being redox active/inactive for iron-based impurities lies in the middle-ppm range

引用

页码：260 / 265

页数：6

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