A5060073865- 2D Materials and Applications
- Graphene research and applications
- Nanowire Synthesis and Applications
- Energy Harvesting in Wireless Networks
- Thermal properties of materials
- Advanced Thermoelectric Materials and Devices
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
University of California, Berkeley
2018-2025
A current challenge in the processing of 2D materials, or "van der Waals (vdW) solids", is transfer layers from source crystals and growth substrates onto target substrates. Transfer—as opposed to direct patterning on target—enables low-temperature as well use diverse materials. These two attributes will allow assembly vdW heterostructures realize devices exploiting unique properties Until now, however, there has been no effective method for transferring regions monolayer material controlled...
Tape-mediated mechanical exfoliation of layered materials is known to require multiple steps and produce small, irregularly shaped monolayer samples. Recently, it has been demonstrated experimentally that deposition a thin layer Au on the be exfoliated prior application tape can yield large samples transition metal dichalcogenides in one step. Here mechanism underlying these improvements explored using atomic scale total energy calculations study thin-film-assisted both ${\mathrm{MoS}}_{2}$...
A theoretical framework for analyzing the mechanical exfoliation of 2D materials at finite temperature is introduced. As an example, this framework, based on transition-state theory and calculation reaction pathway, applied to multilayer ${\mathrm{MoS}}_{2}$. The predicts that altering bonding top layer bulk through straining or twisting slowly exfoliating low temperatures will enhance yield monolayer material.