Electron 'invisible ink' promises purer nanocrystals

 作者:路崭     |      日期:2019-03-14 07:02:10
By Duncan Graham-Rowe BY ITS very nature, nanotechnology is too small to see with the naked eye. Even so, chemists have found a way to make it even less perceptible by creating a nanoscopic form of “invisible ink”. But it’s not about slipping secret messages across the lab, says Hubertus Marbach at the University of Erlangen-Nuremberg in Germany. Instead, the technique offers a way of growing nanocrystals of a much higher purity than achieved to date. Marbach and his colleagues used an electron beam to remove oxygen ions from a silicon oxide wafer,