User talk:Mathwhiz90601

Welcome!

Hello, Mathwhiz90601, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Again, welcome! --Walter Siegmund (talk) 23:02, 5 November 2006 (UTC)[reply]

Quoits[edit]

Is it true that quoits is popular in Edmonds? --Walter Siegmund (talk) 23:04, 5 November 2006 (UTC)[reply]

Well, it said so in the quoits article. Mathwhiz90601 23:31, 5 November 2006 (UTC)[reply]

Carbon nanotube[edit]

First and foremost, I am really glad that you're reading scientific articles and honestly trying to improve wikipedia. Then, I'll get into my usual grumpy teaching mood :-)

A normal WP procedure is, if you're reverted, ask and wait for reply to reach consensus. If situation is clear then revert. I was obviously inactive when you reverted. The case seems clear to me, but in the opposite direction :-)
Introduction of a WP article does not need refs, it should summarize article's milestones. Thus my revert was about the latter. I admit the article is in a poor lumped state, and I haven't made time yet to fix it.

To science.

Yildirim et al. report calculations. Calculations have a very limited predictive power in this specific area - molecular transformations under pressure. The main reason is they have to oversimply (neglect) chemistry and many details of the experiment, which are very complex in reality.
That pressure result in transformation of carbon bonds is known experimentally for ages. Compressing fullerene or nanotubes produces all kind of carbons, including nanocrystalline diamond, graphite like, amorphous and exotic nanotube structures. It is difficult to stop where nanotubes are just merged - much easier to transform the tubes into a graphite-like ribbon.
High pressure experiments are limited to a few centimeters. Thus a phrase "unlimited-length wires" is simply incorrect - it will take ages to make those.
I believe there were many papers where nanotubes were transformed ("merged") by a simple annealing without pressure, experimentally, back in 1997 (e.g. Chem. Phys. Lett. 266, 422, 1997 doi:10.1016/S0009-2614(97)00053-5).

I have retired from nanotube research a few years ago, but still keep a library, don't hesitate to ask if you need anything. Cheers. Materialscientist (talk) 03:46, 4 November 2009 (UTC)[reply]