Carbon Nanotubes are so light that they float in airpic.twitter.com/AlHWeap8cm
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Here's what makes Carbon Nanotubes so impressive:
Carbon Nanotubes have a "tensile strength" σ of about 60 Giga-Pascals
That's 60,000 Newtons per square 𝑚𝑖𝑙𝑙𝑖𝑚𝑒𝑡𝑒𝑟
For reference, an 
weighs about 20,000 Newtonspic.twitter.com/oJJji9CozA
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Engineering Difficulties of CNT:
Most nanotubes are constructed with a cross sectional area of about 1nm²
This yields the max. applied force of ~ 10⁻⁸ N
Therefore, the main engineering difficulty is constructing "large scale" Carbon NanotubesShow this threadThanks. Twitter will use this to make your timeline better. UndoUndo
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Just to avoid misunderstandings: if you hang an elephant by a carbon nanotube, the nanotube will snap immediately. Actually it will snap also if you pull gently with your fingers
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Indeed, but that's because most nanotubes have a cross sectional area of about 1nm^2, which significantly reduces the amount that it can hold. Okay, so just wrap them together? Well that apparently reduces the tensile strength by half with the addition of each thread, I think.
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@BiggyCheesy frère ça c'est un petit peu frais en vraiThanks. Twitter will use this to make your timeline better. UndoUndo
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Here, the magical Carbon Nanoubes.https://mobile.twitter.com/engineers_feed/status/1144318142702870530 …
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