Film made of nanocrystals
Australian researchers have developed nanocrystals that could replace the so far heavy and energetic night vision equipment. But the invention can serve not only soldiers, policemen, or hunters.
The night vision equipment that is on the market today is cumbersome, bulky and expensive.
The contrast to the development of Dragomir Neshev and his physicist colleagues at the Australian National University (ANU) in Canberra could not be greater.
One of their new nanocrystals is 500 times smaller than a human hair.
Now, a single crystal does not make a night vision device, but “an ultra-thin film that is applied to normal glasses can make seeing in the dark,” says Neshev.
Spooky green pictures
Commercially available devices have to convert the visible, invisible infrared light, which also radiates in subjectival darkness, with high energy expenditure.
The ghostly green pictures, which are known from television kills, are created.
According to the Australian researchers, the new nanocrystals can perform the same process without additional energy requirements.
Until now, only the prototype of a single crystal exists, and the amount of infrared light required is still very high, but the physicists are confident that their development will soon prove to be practica
For counterfeit-proof banknotes
“This tiny application could also be used, for example, to make bank notes particularly counterfeit proof or to develop new imaging methods for medicine.
” The physicist thinks among other things about the ” Examination of living body cells.
The new technology could also be used to generate holograms, three-dimensional images, which should also prevent counterfeiting, for example ID documents.
Neshev’s colleague Mohsen Rahmani considers the development of a “milestone” in nanophotonics.
The particular achievement is to be able to apply a semiconductor in the nanoparticle on transparent material such as glass.
For about 15 years the Australians have already researched the technology.
The second night vision device of the armor maker BAE for soldiers we have presented to you here. It amplifies residual light and makes heat radiation visible.
For several years, nanophotonics has been a source of hope for medicine, especially in cancer therapy.
Thus, targeted laser pulses can be used to heat nanoparticles, which are previously introduced into tumors.
In this way, cancer cells can be destroyed or at least less resistant to conventional methods such as radiation and chemotherapy.