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| January 2, 2004 Headline: Nanotechnology Events for January Source: Nanotechnology Now Description: A complete list of all the world's nanotechnology events.
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January 9, 2004
January 9, 2004
January 12, 2004
January 14, 2004 January 28, 2004 Headline: Self-Assembly Technique Shines Even If Flash Device Was For ShowSource: Small Times Description: The article talks about the self-assembly technique used for making the nanocrystals, which could become a cornerstone – and a building block – in Big Blue’s future miniaturized computing components. The
article takes both a economical and scientific approach to helping everyone
understand what may come next in miniaturization, of course self-assembly
is more than just the miniaturization of applications that exist today.
IBM used self assembly to build a nanocrystal FLASH memory device (a) Step 1: Polymer molecules are made to self assemble into perfect hexagonal arrangements. The sizes of the arrangement are set by the size of the polymer molecules. The dark circular areas are 20 nanometers in diameter and are spaced 40 nanometers apart. (b) Step 2: IBM used the polymer material as a stencil to reproduce the nanoscale pattern in silicon dioxide, which is more rugged than the polymer and able to withstand higher temperatures. At this stage the polymer material is completely removed. (c) Step 3: A combination of depositing silicon material and etching leaves silicon nanocrystals embedded within the 20 nanometer regions defined originally by the self assembled polymer. (d) Dimensions of the hexagonal pattern of the initial polymer (dotted curve) are maintained throughout, as shown by the histogram of the final silicon nanocrystal dimensions (solid curve). The grey curve represents the dimensions of the hexagonal pattern at an intermediate process step. |