Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
R_Colin_Johnson
User Rank
Blogger
re: Nanotubes not toxic, researchers say
R_Colin_Johnson   6/22/2011 2:55:36 AM
NO RATINGS
The researchers said they expect multi-walled nanotubes to also contain the contaminants, however the multi-walled variety are also much longer, so conceivably it could be their aspect ratio that cause an asbestos-like reaction (asbestos fibers are also very long, which causes them to get trapped in the lungs). That is why they have to text them next to find out whether its their aspect ratio or the contaminants.

R_Colin_Johnson
User Rank
Blogger
re: Nanotubes not toxic, researchers say
R_Colin_Johnson   6/22/2011 2:50:55 AM
NO RATINGS
I asked the researchers this question myself, but they said that many applications require carboxylation to functionalize the nanotubes, which produces the toxic byproducts. However, there are other ways of manufacturing them, and you are right to advise their makers to explore using those other methods (but in the meantime they should filter carboxylated nanotubes to remove the contaminants).

R_Colin_Johnson
User Rank
Blogger
re: Nanotubes not toxic, researchers say
R_Colin_Johnson   6/22/2011 2:44:20 AM
NO RATINGS
The title merely states the essense of the story, that reseachers say nanotubes are not toxic, which the story qualifies by stating that a certain kind have found to be nontoxic under certain conditions, and that those conditions are now being extended to the other types. This is standard journalist practice underwritten by the courts which do not require headlines to state the whole story, as long as the body of the story does.

resistion
User Rank
CEO
re: Nanotubes not toxic, researchers say
resistion   6/21/2011 7:20:38 PM
NO RATINGS
The question is whether CNT manufacturers will spend more on filtration if the CNTs will be encapsulated anyway. Shouldn't they focus on eliminating the contaminants?

wilber_xbox
User Rank
Manager
re: Nanotubes not toxic, researchers say
wilber_xbox   6/21/2011 5:16:56 PM
NO RATINGS
The title and the first line tells completely different story. The title of this article says that Nanotubes are not toxic while the researchers claim only that Nanotubes may not be toxic. The whole article suggest the same thing that one particular instance of nanotube is found to be non-toxic but there might be other instances where it is otherwise.

bmws88
User Rank
Rookie
re: Nanotubes not toxic, researchers say
bmws88   6/21/2011 5:05:51 PM
NO RATINGS
"there is no reason to think multi-walled nanotubes will also be given a clean bill of health"? will or won't?

unknown multiplier
User Rank
Rookie
re: Nanotubes not toxic, researchers say
unknown multiplier   6/21/2011 4:52:15 AM
NO RATINGS
good catch!

R_Colin_Johnson
User Rank
Blogger
re: Nanotubes not toxic, researchers say
R_Colin_Johnson   6/21/2011 4:21:29 AM
NO RATINGS
We are not out of the woods yet, because the nanotubes that were said to be akin to asbestos were of the multi-walled variety rather than the single-walled ones tested here. However, they are looking at those now and there is no reason to think multi-walled nanotubes will also be given a clean bill of health.

LarryM99
User Rank
CEO
re: Nanotubes not toxic, researchers say
LarryM99   6/20/2011 8:52:35 PM
NO RATINGS
I was surprised to think that there might be health considerations regarding nanotubes, so I looked up the previous article. Maybe we do actually learn from previous mistakes. It would have been very bad to have an equivalent to the asbestos fiasco all over again. Interesting stuff. Larry M.



Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Analog Faceplate Design Decisions: Art or Science?
Max Maxfield
50 comments
My degree is in Control Engineering -- a core of math with "surrounding subjects" of electronics, mechanics, and hydraulics and fluidics. The only official programming I did as part of ...

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
2 comments
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

latest comment kfield Some good recommendations here!
Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
3 comments
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
5 comments
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...