Professor Moriarty - using nano lithography - shows off a Christmas Tree created by precisely removing 42 hydrogen atoms atoms from a silicon surface. More from Prof Moriarty and this technology:    • Professor Moriarty - Sixty Symbols   More Christmas videos: http://bit.ly/XmasBrady Tiny Periodic Table: https://www.youtube.com/watch?v=cQU2IAsQak8 Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Sixty Symbols videos by Brady Haran A run-down of Brady's channels: http://bit.ly/bradychannels