Electrochemical Molecular Intercalation for Synthesis of Monolayer Atomic Crystal Molecular Superlattices

High-yieldingStable materials Highly reproducibleHighly tunable structures, sizes, properties and functions

Synthetic method towards bulky monolayer materialsSynthetic method towards a new class of stable monolayer atomic crystals alternating with molecular layers superlatticesCreating stable monolayer material from unstable 2DACsFlexible integration of radically different chemical composition and electronic structure at the atomic scaleVersatile material platform for fundamental physics studies and novel device applications

The inventors have developed a novel electrochemical intercalation strategy toward stable, high-order 2D atomic layer materials-molecular superlattices with high yield and reproducibility. Using black phosphorus, they have demonstrated a new class of monolayer atomic crystal molecular superlattices (MACMS). The resulting MACMS shows expanded interlayer distance that is tailorable by molecular structure and molecular size as well as unprecedented material performance. The approach overcomes the limitations in current strategies and allows for creation of a vast library of superlattice structures between distinct atomic layers and molecular layers with tailored interlayer distances, variable structure configurations, and tunable electronic/optical properties. This is achieved by systematically varying the 2DACs and tailoring the molecular structures with varying sizes, symmetries, and substituent groups. This approach will help build a versatile material platform for both the fundamental physics studies and novel device applications.

Background

Semiconductor superlattices are composed of alternating layers of semiconductor materials. These materials are important in the design and creation of artificial materials with tailored electronics properties for a wide range of applications in modern electronic and optoelectronics devices. Among these materials, artificial superlattices based on van der Waals heterostructures of two-dimensional atomic crystals offer great potential as they can be readily tuned in structure and properties. Current strategies towards such artificial superlattices include layer-by-layer exfoliation and restack, chemical-vapor deposition, and alkali metal ion intercalation. A new approach towards these materials is needed for high yield, processing compatibility, and reproducibility.

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Tech ID/UC Case

29485/2018-595-0

Related Cases

2018-595-0

USA