Jiwoong Park

TL;DR: There is a thermodynamic driving force for B and N atoms to cluster into BNC structures in graphene, rather than randomly distribute into isolated B andN graphitic dopants, although under the present growth conditions, kinetics limit segregation of large B-N domains.

TL;DR: Using transient absorption (TA) microscopy as a hot electron thermometer, this article showed that disorder-assisted acoustic-phonon supercollisions best describe the rate-limiting relaxation step in graphene over a wide range of lattice temperatures (Tl = 5-300 K), Fermi energies (EF = ± 0.35 eV), and optical probe energies (∼0.3-1.1 eV).

TL;DR: A DUV-vis-NIR hyperspectral microscope is reported that provides imaging and spectroscopy at energies of up to 6.2 eV, allowing comprehensive, all-optical mapping of chemical composition in graphene/h-BN lateral heterojunctions and interlayer rotations in twisted bilayer graphene (tBLG).

TL;DR: High-throughput growth of 6-inch wafer-scale monolayer MoS2 and WS2 is reported, which is directly compatible with scalable batch processing and device integration, and a pulsed metal-organic chemical vapor deposition process is developed, which prevents secondary nucleation despite high precursor concentrations.

TL;DR: The results establish photothermal current microscopy as an important addition to the existing suite of characterization techniques for carbon nanotubes and other linear nanostructures.