Cytotoxicity effects of water dispersible oxidized multiwalled carbon nanotubes on marine alga, Dunaliella tertiolecta

2010 ◽  
Vol 100 (2) ◽  
pp. 194-201 ◽  
Author(s):  
Liping Wei ◽  
Megha Thakkar ◽  
Yuhong Chen ◽  
Susana Addo Ntim ◽  
Somenath Mitra ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Marine Alga ◽  
Dunaliella Tertiolecta ◽  
Multiwalled Carbon ◽  
Water Dispersible ◽  
Cytotoxicity Effects ◽  
Oxidized Multiwalled Carbon Nanotubes

scholarly journals Water-Dispersible Multiwalled Carbon Nanotubes Obtained from Citric-Acid-Assisted Oxygen Plasma Functionalization

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mohammad Jellur Rahman ◽  
Tetsu Mieno
Keyword(s):  
Carbon Nanotubes ◽  
Citric Acid ◽  
Acid Solution ◽  
Multiwalled Carbon Nanotubes ◽  
Oxygen Plasma ◽  
Surface Defects ◽  
Citric Acid Solution ◽  
Multiwalled Carbon ◽  
Pure Ethanol ◽  
Water Dispersible

A new and safe method has been developed to functionalize multiwalled carbon nanotubes (MWCNTs) with fewer surface defects, which significantly increases their dispersibility in water. MWCNTs are pretreated in pure ethanol by a supersonic homogenizer. Then, the mixture is dried and soaked in weak citric acid solution. Finally, the MWCNTs in the citric acid solution are treated with radio frequency (13.56 MHz) oxygen plasma. As a result, many carboxyl functional groups are attached onto the MWCNT surfaces and stable dispersion of the MWCNTs in water is obtained. The treatment conditions are optimized in this study.

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