techtrend writes "In an article on Eurekalert, Northwestern chemists report making the world's smallest plotter, a device capable of drawing multiple lines of molecules -- each line only 15 nanometers or 30 molecules wide -- with such precision that only five nanometers. They lay down a grid of lines made of 16-mercaptohexadecanoic acid (MHA). Then dots of octadecanethiol (ODT) are placed at pre-calculated positions using the grid for precision positioning. They plan to use this process to make ultrahigh density arrays of different organic and biological material and nanostructures. "
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