Atomically precise mechanosynthesis of carbon structures on hydrogenated Silicon
7 hours ago
- #nanotechnology fabrication
- #scanning tunneling microscopy
- #surface science
- Demonstrates atomically precise mechanosynthesis of carbon structures with simultaneous spatial and chemical control using inverted-mode STM.
- Uses C$_2$ units from surface-deposited molecules to donate to reactive sites on a hydrogen-passivated Si(100) surface.
- Achieves single-site C$_2$ donation, spatially patterned multi-site C$_2$ donation, and stepwise assembly of polyyne structures via successive C-C bond formation.
- Establishes controlled mechanosynthetic donation as a foundational capability for programmable, atomically precise fabrication.