Here, we report spatially resolved Raman results of a hBN/WS2/hBN heterostructure over a large area in which microbubbles are present. Spatial variations in the optical phonon characteristics of both WS2 and hBN reveal that the bubbles are formed at the interface between the top hBN layer and ...
Encapsulation by hexagonal boron nitride (hBN) has been widely used to address intrinsic properties of two-dimensional (2D) materials. The hBN encapsulation, however, can alter properties of 2D materials through interlayer orbital hybridization. In this paper, we present measurements of temperature depe...
source, we not only produce the In this work, with ammonia borane pristine and high-quality monolayer (hB-HBN3NfHilm3) and single crystals, but also new forms of hybrid structures using a PECVD method. These newborn structures could unfold different layers of this special 2D material and ...
Using an 80-kV accelerated electron beam, defects were deliberately produced, visualized, excited in situ and characterized in real time in monolayer WS2within hBN|WS2|hBN heterostructures at 100K. These color centers were simultaneously measured by cathodoluminescence microscopy and differentiated by ...
Furthermore, Raman signal was evaluated to highlight the influence of the surroundings on the monolayer system. Here, linewidth and intensity improvement for 2D excitons as a consequence of hBN-encapsulation is demonstrated, and a change of strain and doping levels in our produced structures are ...
Spatially resolved CL spectra at 13 K exhibited a predominant 5.5-eV emission band, which has been ascribed to originate from multilayered aggregates of hBN, markedly at thicker areas formed on the step edges of the substrate. Conversely, a faint peak at 6.04卤0.01 eV was routinely observed ...
The plasma enhanced atomic layer deposition of 10nm thin high quality aluminum oxide (Al2O3) on graphene is demonstrated using a monolayer of hexagonal boron nitride (hBN) as protection layer. Raman spectroscopy is performed to analyze possible structural changes of the graphene lattice caused by ...
Note that In, hexagonal boron nitride (hBN)/Co, Ni and high-vacuum Au contacts to monolayer MoS2 exhibit similar values of RC (~3–6 kΩ μm) and ρC (~10−6–10−5Ω cm2)13,14,18,50. c, Required minimum VDS for Bi-contacted monolayer TMD transistors to work in the ...
(AFM) image of 1L WSe2after removal of a 2 × 2 µm2region of the NPh film using contact-mode AFM. The PL map of the sample is shown fordthe maximum count,ethe peak position, andfthe peak width.g–kPL quenching on 1L WSe2functionalized with a NPh film via hBN-assisted ...
Phonon polaritons enable light confinement at deep subwavelength scales, with potential technological applications, such as subdiffraction imaging, sensing and engineering of spontaneous emission. However, the trade-off between the degree of confinement