Japan tooth patch could be end of decay
Researchers can create film just 0.004 millimetres (0.00016 inches) thick by firing lasers at compressed blocks of hydroxyapatite in a vacuum to make individual particles pop out.
These particles fall onto a block of salt which is heated to crystallise them, before the salt stand is dissolved in water.
The film is scooped up onto filter paper and dried, after which it is robust enough to be picked up by a pair of tweezers.
These particles fall onto a block of salt which is heated to crystallise them, before the salt stand is dissolved in water.
The film is scooped up onto filter paper and dried, after which it is robust enough to be picked up by a pair of tweezers.
Amazing...
I'm not ashamed to admit the concept of firing lasers at something in a vacuum has never occurred to me.
