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Binary atomic silicon logic
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DOI：10.1038/s41928-018-0180-3.png)
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It has been proposed that miniature circuitry will ultimately be crafted from single atoms. Despite many advances in the study of atoms and molecules on surfaces using scanning probe microscopes, challenges with patterning and limited thermal structural stability have remained. Here we demonstrate rudimentary circuit elements through the patterning of dangling bonds on a hydrogen-terminated silicon surface. Dangling bonds sequester electrons both spatially and energetically in the bulk bandgap, circumventing short-circuiting by the substrate. We deploy paired dangling bonds occupied by one moveable electron to form a binary electronic building block. Inspired by earlier quantum dot-based approaches, binary information is encoded in the electron position, allowing demonstration of a binary wire and an OR gate.
Keyword:
MOLECULAR LOGIC
QUANTUM
FABRICATION
CHARGE
CHEMISTRY
DYNAMICS
SURFACES
ENERGY
GATE
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