Bioavailability of Metallic Impurities in Carbon Nanotubes Is Greatly Enhanced by Ultrasonication

被引：23

作者：

Toh, Rou Jun ^{[1
]}

Ambrosi, Adriano ^{[1
]}

Pumera, Martin ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2012年 / 18卷 / 37期

关键词：

carbon; cyclic voltammetry; redox chemistry; nanotubes; ultrasonication; CAPILLARY-ELECTROPHORESIS; REINFORCED COMPOSITES; MODIFIED ELECTRODES; REDOX ACTIVITY; NANOPARTICLES; NICKEL; ELECTROCHEMISTRY; PURIFICATION; GLUTATHIONE; PARTICLES;

D O I：

10.1002/chem.201201955

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Metallic impurities within carbon nanotubes (CNTs) are considered as the main cause of their toxicity. Ultrasonication is a common procedure used to purify and obtain homogeneous dispersions of CNTs as well as to mix them with other components for further processing into composites. Herein, the influence of ultrasonication upon the bioavailability of metallic impurities in CNTs was investigated. We showed that even ultrasonication times as short as 5 min significantly enhanced the bioavailability of metallic impurities, which can therefore interact more actively with biologically important molecules. These findings will have profound impact on the processing of CNTs as well as on nanotoxicity studies.

引用

页码：11593 / 11596

页数：4

共 38 条

[1] Redox-Active Nickel in Carbon Nanotubes and Its Direct Determination
Ambrosi, Adriano
Pumera, Martin
[J]. CHEMISTRY-A EUROPEAN JOURNAL, 2012, 18 (11) : 3338 - 3344
[2] Regulatory Peptides Are Susceptible to Oxidation by Metallic Impurities within Carbon Nanotubes
Ambrosi, Adriano
Pumera, Martin
[J]. CHEMISTRY-A EUROPEAN JOURNAL, 2010, 16 (06) : 1786 - 1792
[3] [Anonymous], 2008, NANO MAG, V4, P14
[4] Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes
Ballesteros, Belen
Tobias, Gerard
Shao, Lidong
Pellicer, Eva
Nogues, Josep
Mendoza, Ernest
Green, Malcolm L. H.
[J]. SMALL, 2008, 4 (09) : 1501 - 1506
[5] Banks C.E., 2006, Angew. Chem, V118, P2595
[6] Carbon nanotubes contain metal impurities which are responsible for the "electrocatalysis" seen at some nanotube-modified electrodes
Banks, CE
Crossley, A
Salter, C
Wilkins, SJ
Compton, RG
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (16) : 2533 - 2537
[7] Antioxidant enzyme activities and lipid peroxidation in the freshwater cladoceran Daphnia magna exposed to redox cycling compounds
Barata, C
Varo, I
Navarro, JC
Arun, S
Porte, C
[J]. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, 2005, 140 (02): : 175 - 186
[8] Copper oxide nanoparticle impurities are responsible for the electroanalytical detection of glucose seen using multiwalled carbon nanotubes
Batchelor-McAuley, Christopher
Wildgoose, Gregory G.
Compton, Richard G.
Shao, Lidong
Green, Malcolm L. H.
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2008, 132 (01): : 356 - 360
[9] Metallic Impurities are Responsible for Electrocatalytic Behavior of Carbon Nanotubes Towards Sulfides
Chng, Elaine Lay Khim
Pumera, Martin
[J]. CHEMISTRY-AN ASIAN JOURNAL, 2011, 6 (09) : 2304 - 2307
[10] Carbon nanotubes: Synthesis, integration, and properties
Dai, HJ
[J]. ACCOUNTS OF CHEMICAL RESEARCH, 2002, 35 (12) : 1035 - 1044

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