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.
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.
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.
Oh shit this is actually huge. Like, actually building real things huge.
Yeah, you can basically grow shit bottom up from the atomic scale!
Absolutely insane to just have pop up, I didn’t even realize this was on the horizon. Goddamn I’m excited for this tech.
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.