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Home > News > Gutenberg's grandchildren in nanotechnology labs

September 4th, 2007

Gutenberg's grandchildren in nanotechnology labs

When Gutenberg built his printing machine with moveable type in the mid 15th century, little idea did he have that he started the information age; even less that scientists would adopt the process to the nanoscale. The printing press went through several revolutionary improvements such as Lanston's monotype machine (1884), Mergenthaler's linotype machine (1886), the photo-typesetting process developed in the 1960s and finally digital printing in the 1980s. Today, printing is the most widespread technology to deposit small particles onto various surfaces. Commercial desktop laser printers use toner particles with a few microns in size while top of the line high-priced industrial printing machines sometimes already use sub-micron size particles. On the other hand, the precise positioning of nanoparticles on surfaces is key to most nanotechnology applications especially nanoelectronics. However, for automated patterning of particles, existing methods are either slow (e.g., dip-pen lithography) or require prefabricated patterns on the target substrate (e.g. for electrostatic positioning). Using a process akin to the printing press, researchers already have managed to bypass the need for epitaxial growth or wafer bonding to integrate wide ranging classes of dissimilar semiconducting nanomaterials onto substrates for the purpose of constructing heterogeneous, three dimensional electronics (see our Spotlight Gutenberg + nanotechnology = printable electronics). Scientist in Switzerland have now developed a parallel method for the assembly and integration of a large number of bulk-synthesized nanoparticles onto an unstructured surface with high resolution and yield.


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