Atomically precise mechanosynthesis of carbon structures on hydrogenated Si(100) by inverted-mode STM
arxiv.org
The ability to build atomically precise structures on surfaces with complete control over both atomic placement and chemical bonding remains a central challenge in nanoscale fabrication. Here, we demonstrate simultaneous spatial and chemical control over the mechanosynthetic fabrication of carbon structures. Using inverted-mode STM, C$_2$ units are donated from surface-deposited molecules to pre-patterned reactive sites on a hydrogen-passivated Si(100) surface. We demonstrate single-site C$_2$ donation, spatially patterned multi-site C$_2$ donation, and the stepwise assembly of polyyne structures through successive C-C bond formation. Together, these results establish controlled mechanosynthetic donation as a foundational capability for programmable atomically precise fabrication.
  • Warl0k3@lemmy.world
    6·
    7 hours ago

    This mechanosynthesis strategy is not limited to placement of isolated C2 units on the Si(100) surface. Once transferred, surface-bound IR-C2 structures can undergo successive reactions

    Oh shit this is actually huge. Like, actually building real things huge.

      • Warl0k3@lemmy.world
        3·
        6 hours ago

        Absolutely insane to just have pop up, I didn’t even realize this was on the horizon. Goddamn I’m excited for this tech.

        • ☆ Yσɠƚԋσʂ ☆@lemmy.mlOP
          3·
          5 hours ago

          Wasn’t on my radar either, definitely one of the most exciting tech breakthroughs in a while. I wonder if you could apply this to assembling carbon based chips as well.

  • artifex@piefed.zipEnglish
    4·
    6 hours ago

    Oh wow. I just re-read Drexler’s Radical Abundance recently after coming across an ancient job application I sent in to his lab like 25 years ago (I didn’t get it). I sort of assumed by this point I wouldn’t see real progress in my lifetime.