A football field in one gram of substance. Free Technical Library News

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Football field in one gram of the substance

09.10.2018

Chemists from Dresden have created a material with a record porosity - one gram of such a substance has a surface area larger than the area of an entire football field, and this, for a minute, is more than 7 square meters.

The substance was named DUT-60. It has the largest internal surface area of any solid material known today: 7 square meters per gram of substance. This ultraporous substance belongs to the class of metal-organic framework structures. The structure of such materials consists of metal ions or their small clusters, which are interconnected by long organic molecules. It turns out something like cells of plasticine balls, fastened together with thin knitting needles.

The problem of creating such materials is that when you try to make an increasingly openwork structure, at some point this structure "collapses" - it loses its internal structure, and after that, its internal surface. Such an ultraporous structure can be stabilized by placing it in a liquid. But to dry it, retaining its original shape, as a rule, does not work. Here you can draw an analogy with an algae: if you take it out of the water, it immediately sticks together and turns into a sticky green mass, not at all like the beautiful plant that floated in the water.

To solve this problem, German chemists first calculated the proposed structure of DUT-60 on a computer, proving its theoretical possibility. And only five years later they managed to reproduce it, as they say, live.

The complexity and laboriousness of synthesis make this material extremely expensive, and the quantities in which it was obtained are very, very small - tens of milligrams. However, the first place is the first place, and it's worth it. Moreover, this is not just a record for the sake of a record, but also the prospect of creating useful materials.

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robot citizen 02.11.2017

Saudi Arabia became the first country to grant citizenship to a robot. Citizenship was given to the humanoid robot Sophia, created by Hanson Robotics from Hong Kong.

The venue for this unusual event was the Future Investment Initiative (FII) investor conference hosted by the Public Investment Fund (PIF).

Thanking people for granting citizenship, the robot answered the questions of the audience. Among others, there was a question about robots that threaten a person, which are shown in some science fiction films. According to Sophia, people have nothing to fear.

"You read too much Elon Musk and watch too many Hollywood movies," the source quoted the robot as saying.

Robotics is a big focus in the $500 billion NEOM Industrial and Business Zone to be set up in northwest Saudi Arabia.

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