472 citations · 2.5k across the 22 of their papers we have counts for
22 papers
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…
Synthesis and properties of free-standing monolayer amorphous carbon
Chee-Tat Toh, Hongji Zhang, Junhao Lin +12
Bulk amorphous materials have been studied extensively and are widely used, yet their atomic arrangement remains an open issue. Although they are generally believed to be Zacharias…
Deciphering the Intense Post-Gap Absorptions of Monolayer Transition Metal Dichalcogenides
Jinhua Hong, Masanori Koshino, Ryosuke Senga +3
Rich valleytronics and diverse defect-induced or interlayer pre-bandgap excitonics have been extensively studied in transition metal dichalcogenides (TMDCs), a system with fascinat…
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…
Electron spectroscopy of single quantum objects to directly correlate the local structure to their electronic transport and optical properties
Ryosuke Senga, Thomas Pichler, Kazu Suenaga
Physical property of a single quantum object is governed by its precise atomic arrangement. The direct correlation of localized physical properties with the atomic structures has b…
Proton and Li-Ion Permeation through Graphene with Eight-Atom-Ring Defects
Eoin Griffin, Lucas Mogg, Guang-Ping Hao +21
Defect-free graphene is impermeable to gases and liquids but highly permeable to thermal protons. Atomic-scale defects such as vacancies, grain boundaries and Stone-Wales defects a…
Probing exciton dispersions of freestanding monolayer WSe2 by momentum resolved electron energy loss spectroscopy
Jinhua Hong, Ryosuke Senga, Thomas Pichler +1
Momentum resolved electron energy-loss spectroscopy was used to measure the dispersions of excitons in a free-standing monolayer of WSe2. Besides the parabolically dispersed valley…
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…
Position and momentum mapping of vibrations in graphene nanostructures in the electron microscope
Ryosuke Senga, Kazu Suenaga, Paolo Barone +3
Propagating atomic vibrational waves, phonons, rule important thermal, mechanical, optoelectronic and transport characteristics of materials. Thus the knowledge of phonon dispersio…
One-dimensional van der Waals heterostructures
Rong Xiang, Taiki Inoue, Yongjia Zheng +23
Property by design is one appealing idea in material synthesis but hard to achieve in practice. A recent successful example is the demonstration of van der Waals (vdW) heterostruct…
Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals
M. O. Nestoklon, S. V. Goupalov, R. I. Dzhioev +12
We demonstrate the optical orientation and alignment of excitons in a two-dimensional layer of CsPbI perovskite nanocrystals prepared by colloidal synthesis and measure the ani…
Experimental determination of the local optical conductivity of a semiconducting carbon nanotube and its modification at individual defects
Ryosuke Senga, Thomas Pichler, Yohei Yomogida +3
Measurements of optical properties at nanometre-level are of central importance for characterization of optoelectronic device. It was, however, hardly possible for the conventional…
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…
Confined linear carbon chains: A route to bulk carbyne
Lei Shi, Philip Rohringer, Kazu Suenaga +6
The extreme instability and strong chemical activity of carbyne, the infinite sp1 hybridized carbon chain, are responsible for its low possibility to survive in ambient conditions.…
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…
Detection of Photons Emitted from Single Er Atoms in Energy Dispersive X-ray Spectroscopy
Kazu Suenaga, Toshiya Okazaki, Eiji Okunishi +1
Detecting the photons emitted from single quantum objects is highly desired to diagnose nano-scale devices. It has been, however, believed very difficult to sense single atoms in o…
Graphene nanoribbons from unzipped carbon nanotubes: atomic structures, Raman spectroscopy and electrical properties
Liming Xie, Hailiang Wang, Chuanhong Jin +4
We investigated the atomic structures, Raman spectroscopic and electrical transport properties of individual graphene nanoribbons (GNRs, widths ~10-30 nm) derived from sonochemical…