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.
If and when this becomes mainstream, we’re going to need better software than OpenSCAD, FreeCAD and Blender to actually design the things you want to build.
If and when this becomes mainstream, we’re going to need better software than OpenSCAD, FreeCAD and Blender to actually design the things you want to build.
Heh, there’s probably already a buried blender mode that does it