Date: 14/04/2017 06:05:41
From: Tau.Neutrino
ID: 1051652
Subject: Scientists tie the world's tightest knot

Scientists tie the world’s tightest knot

Researchers at the University of Manchester hope their chemically produced, three-strand molecular knot will some day form the foundation for very light and strong materials.

more…

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Date: 14/04/2017 06:06:17
From: Tau.Neutrino
ID: 1051654
Subject: re: Scientists tie the world's tightest knot

Related article

What makes a knot strong? Scientists have figured out how your shoelaces untie themselves.

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Date: 14/04/2017 09:09:10
From: mollwollfumble
ID: 1051813
Subject: re: Scientists tie the world's tightest knot

Tau.Neutrino said:


Related article

What makes a knot strong? Scientists have figured out how your shoelaces untie themselves.

“When you talk about knotted structures, if you can start to understand the shoelace. This is the first step toward understanding why certain knots are better than others, which no one has really done.”

I can understand that. Knot theory is a well known branch of mathematics, and I know that it has been used to determine that a good knot always has two unders in a row rather than just under-over-under-over-…, but I don’t remember anyone ever adding friction into the calculation. I hope they include elasticity – elasticity can make a knot undo itself very fast.

How does the joke go?

A ……. is a person who doesn’t know how to tie his shoelaces.

Is it topologist, mathematician, physicist or engineer?

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Date: 14/04/2017 09:21:41
From: mollwollfumble
ID: 1051819
Subject: re: Scientists tie the world's tightest knot

Tau.Neutrino said:

Scientists tie the world’s tightest knot

Researchers at the University of Manchester hope their chemically produced, three-strand molecular knot will some day form the foundation for very light and strong materials.

more…

> Using cutting-edge chemical techniques, the researchers have created the tightest knot ever made, woven on a molecular level. The new knot is a circular triple helix only 20 nanometers long, containing only 192 atoms

How would you go about fabricating a molecular knot like that?

I’m sure they haven’t done it the way that is most obvious to me. The way that is obvious to me is to tie a macroscopic knot in fine wire, and attach the ends of a linear polymer like polyethylene to the ends of the macroscopic knot. Then undo the macroscopic knot, transferring the knot to the polymer.

Reply Quote
Date: 16/04/2017 02:51:03
From: bob(from black rock)
ID: 1052755
Subject: re: Scientists tie the world's tightest knot

Why don’t you all go and get knotted?

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Date: 16/04/2017 03:01:52
From: Tau.Neutrino
ID: 1052756
Subject: re: Scientists tie the world's tightest knot

bob(from black rock) said:


Why don’t you all go and get knotted?

No Bondage Here.

Reply Quote
Date: 16/04/2017 03:05:03
From: mollwollfumble
ID: 1052759
Subject: re: Scientists tie the world's tightest knot

bob(from black rock) said:


Why don’t you all go and get knotted?

I’m knot that flexible.

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