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Biodegradation of carbon nanotubes

HEADNOTE

Researchers have discovered a naturally occurring enzyme as a potential candidate that can degrade these unique nanomaterials.

The strong interest in nanotechnology and the development of new nanomaterials has led to some concern about their potential

toxicity. Nanomaterials are typically between 1 and 100 nanometers in size. As a comparison, the diameter of one human hair is 10,000 times larger than 1 nanometer.

As more and more commercial products have been developed with nanomaterials, concern has arisen about their safe use, particularly when placed in contact with human beings. For example, titanium dioxide is used widely as a pigment in cosmetic products such as sunscreens. Conventional titanium dioxide is white in appearance while nano-sized titanium dioxide is transparent. Does conventional titanium dioxide used in the past have a comparable health and safety profile to titanium dioxide nanoparticles?

One notable nanomaterial is carbon nanotubes, which is composed of thick rolls of graphite that are also stronger than steel. In a previous TLT article, the precursor to carbon nanotubes, graphene, was found to be the strongest material ever examined.'

In addition, make sure to read these articles:

  • Nontoxic Clean-Up of Nanomaterials
    • HEADNOTE NANOTECHNOLOGY Researchers at the Univ. of Pittsburgh have devised the first natural, nontoxic method for biodegrading carbon nanotubes - one-atom-thick rolls of graphite that ......
  • Carbon Nanotechnologies, Inc. Announces the Allowance of a U.S. Patent...
    • HOUSTON -- Carbon Nanotechnologies, Inc. --Provides patent coverage for single-wall carbon nanotubes having nanometer-scale coatings. --Carbon Nanotechnologies, Inc. now has patent coverage for both covalent ......
  • A bid to take the lead: Seeking to assure the prosperity of one of...
    • THE KOREAN GOVERNMENT is preparing to support a pillar of its economic strength, electronics. Analysts see demand increasing for ever-faster and smaller devices, which are ......
  • Nanomechanical memory demoed.
    • TECHNOLOGY RESEARCH NEWS By Eric Smalley - A bit -- the basic unit of computer information -- can be made from anything that can be ......
  • NanoInk, Carbon Nanotechnologies Ink JDA
    • NanoInk Inc. and Carbon Nanotechnologies Inc. (CNI) today announced a joint development agreement to employ single-walled carbon nanotubes (SWNT) in next-generation, nano-fabricated devices. SWNTs are ......
  • Safe nanotube breakdown.
    • Nanotubes are certainly small, but they've never been shown to be safe. Now, researchers at the University of Pittsburgh say they've come up with a ......
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