404 citations · 1k across the 16 of their papers we have counts for
16 papers
Direct observation of locally modified excitonic effect within a moiré unit cell in twisted bilayer graphene
Ming Liu, Ryosuke Senga, Masanori Koshino +2
Bilayer graphene, forming moiré superlattices, possesses distinct electronic and optical properties derived from the hybridization of energy band and the emergence of van Hove sing…
One-Dimensional Crystallographic Etching of Few-Layer WS
Shisheng Li, Yung-Chang Lin, Yiling Chiew +12
Layer number-dependent band structures and symmetry are vital for the electrical and optical characteristics of two-dimensional (2D) transition metal dichalcogenides (TMDCs). Harve…
Imaging of isotope diffusion using atomic-scale vibrational spectroscopy
Ryosuke Senga, Yung-Chang Lin, Shigeyuki Morishita +4
The spatial resolutions of even the most sensitive isotope analysis techniques based on light or ion probes are limited to a few hundred nanometres. Although vibration spectroscopy…
Coupling and decoupling of bilayer graphene monitored by electron energy loss spectroscopy
Yung-Chang Lin, Amane Motoyama, Pablo Solis-Fernandez +3
We studied the interlayer coupling and decoupling of bilayer graphene (BLG) by using spatially resolved electron energy loss spectroscopy (EELS) with a monochromated electron sourc…
Excitonic effects in energy loss spectra of freestanding graphene
Alberto Guandalini, Ryosuke Senga, Yung-Chang Lin +8
In this work we perform electron energy-loss spectroscopy (EELS) of freestanding graphene with high energy and momentum resolution to disentangle the quasielastic scattering from t…
Mixed-Salt Enhanced Chemical Vapor Deposition of Two-Dimensional Transition Metal Dichalcogenides
Shisheng Li, Yung-Chang Lin, Jinhua Hong +9
The usage of molten salts, e.g., Na2MoO4 and Na2WO4, has shown great success in the growth of two-dimensional (2D) transition metal dichalcogenides (TMDCs) by chemical vapor deposi…
Tunable Doping of Rhenium and Vanadium into Transition Metal Dichalcogenides for Two-Dimensional Electronics
Shisheng Li, Jinhua Hong, Bo Gao +10
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) with unique electrical properties are fascinating materials used for future electronics. However, the strong Fermi lev…
Does the metallic 1T phase WS2 really exist?
Yung-Chang Lin, Hideaki Nakajima, Chung-Wei Tseng +5
The electronic and optical properties of transition metal dichalcogenides (TMDCs) in distinctive phases, such as 1H, 1T, and 1T' phases, are of fundamental importance for variety o…
Wafer-Scale and Deterministic Patterned Growth of Monolayer MoS2 via Vapor-Liquid-Solid Method
Shisheng Li, Yung-Chang Lin, Xu-Ying Liu +12
Vapor transportation is the core process in growing transition-metal dichalcogenides (TMDCs) by chemical vapor deposition (CVD). One inevitable problem is the spatial inhomogeneity…
Exciton mapping at subwavelength scales in two-dimensional materials
Luiz H. G. Tizei, Yung-Chang Lin, Masaki Mukai +5
Spatially resolved EELS has been performed at diffuse interfaces between MoS and MoSe single layers. With a monochromated electron source (20 meV) we have successfully prob…
Momentum Conserved Ultrafast Charge Transfer Dynamics of Interlayer Excitons in vdW Heterostructures
Pranjal Kumar Gogoi, Yung-Chang Lin, Ryosuke Senga +9
Heterostructures comprising van der Waals (vdW) stacked transition metal dichalcogenide (TMDC) monolayers are a fascinating class of two-dimensional (2D) materials with unique prop…
Vapor-Liquid-Solid Growth of Monolayer MoS2 Nanoribbons
Shisheng Li, Yung-Chang Lin, Wen Zhao +19
Chemical vapor deposition (CVD) of two-dimensional (2D) materials such as monolayer MoS2 typically involves the conversion of vapor-phase precursors to a solid product in a process…
Towards atomically precise manipulation of 2D nanostructures in the electron microscope
Toma Susi, Demie Kepaptsoglou, Yung-Chang Lin +4
Despite decades of research, the ultimate goal of nanotechnology--top-down manipulation of individual atoms--has been directly achieved with only one technique: scanning probe micr…
The structure and local chemical properties of boron-terminated tetravacancies in hexagonal boron-nitride
Ovidiu Cretu, Yung-Chang Lin, Masanori Koshino +3
Imaging and spectroscopy performed in a low-voltage scanning transmission electron microscope (LV-STEM) are used to characterize the structure and chemical properties of boron-term…
Properties of Individual Dopant Atoms in Single-Layer MoS2: Atomic Structure, Migration, and Enhanced Reactivity
Yung-Chang Lin, Dumitru O. Dumcenco, Hannu-Pekka Komsa +4
The differences in the behavior of Re (n-type) and Au (p-type) dopant atoms in single-layered MoS2 were investigated by in situ scanning transmission electron microscopy. Re atoms…
Atomic mechanism of phase transition between metallic and semiconducting MoS2 single-layers
Yung-Chang Lin, Dumitru O. Dumcenco, Ying-Sheng Huang +1
Structural transformation between metallic (1T) and semiconducting (2H) phases of single-layered MoS2 was systematically investigated by an in situ STEM with atomic precision. The…