Finding the needle

You will have heard of the saying 'like trying to find a needle in a haystack' , well how about this one, 'trying to find a single atom in a crystal'. This phenomena has now been successfully carried out by a research team. Individual atoms of lanthanum have been observed in crystals of calcium titanate. The technique used involves using an electron microscope that has its beam narrowed by a technique called 'abberation-correction'. It is hoped that it will allow scientists an improved ...