A5033088986- Graphene research and applications
- 2D Materials and Applications
- Surface and Thin Film Phenomena
- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Quantum and electron transport phenomena
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
- Topological Materials and Phenomena
- Advancements in Battery Materials
- Carbon Nanotubes in Composites
- Force Microscopy Techniques and Applications
- Machine Learning in Materials Science
- Stress Responses and Cortisol
- Cosmology and Gravitation Theories
- Tryptophan and brain disorders
- Particle physics theoretical and experimental studies
- Advanced Chemical Physics Studies
- Advanced Sensor and Energy Harvesting Materials
- Pharmacological Effects of Natural Compounds
- Black Holes and Theoretical Physics
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Metal and Thin Film Mechanics
- Fullerene Chemistry and Applications
National Center for Nanoscience and Technology
2015-2024
University of Chinese Academy of Sciences
2020-2024
Fudan University
2013-2024
Beijing University of Technology
2022-2024
The Affiliated Yongchuan Hospital of Chongqing Medical University
2024
Chongqing Medical University
2024
Suzhou Municipal Hospital
2023
Chinese Academy of Medical Sciences & Peking Union Medical College
2023
Nanjing Medical University
2023
Suzhou Guangji Hospital
2023
Atomically thin tungsten disulfide (WS2), a structural analogue to MoS2, has attracted great interest due its indirect-to-direct band-gap tunability, giant spin splitting, and valley-related physics. However, the batch production of layered WS2 is underdeveloped (as compared with that MoS2) for exploring these fundamental issues developing applications. Here, using low-pressure chemical vapor deposition method, we demonstrate high-crystalline mono- few-layer flakes even complete layers can...
Molybdenum disulfide (MoS2) is back in the spotlight because of indirect-to-direct bandgap tunability and valley related physics emerging monolayer regime. However, rigorous control thickness still a huge challenge for commonly utilized physical exfoliation chemical synthesis methods. Herein, we have successfully grown predominantly MoS2 on an inert nearly lattice-matching mica substrate by using low-pressure vapor deposition method. The growth proposed to be mediated epitaxial mechanism,...
The atomic layer of hybridized hexagonal boron nitride (h-BN) and graphene has attracted a great deal attention after the pioneering work P. M. Ajayan et al. on Cu foils because their unusual electronic properties (Ci, L. J.; Nat. Mater. 2010, 9, 430-435). However, many fundamental issues are still not clear, including in-plane continuity as well edge type at boundary h-BN domains. To clarify these issues, we have successfully grown perfect single-layer h-BN-graphene (BNC) patchwork selected...
Wrinkles are ubiquitous for graphene films grown on various substrates by chemical vapor deposition at high temperature due to the strain induced thermal mismatch between and substrates, which greatly degrades extraordinary properties of graphene. Here we show that wrinkle formation Cu is strongly dependent crystallographic orientations. Wrinkle-free single-crystal was a wafer-scale twin-boundary-free Cu(111) thin film fabricated sapphire substrate through engineering. The wrinkle-free...
Abstract Embedding non-hexagonal rings into sp 2 -hybridized carbon networks is considered a promising strategy to enrich the family of low-dimensional graphenic structures. However, are energetically unstable compared hexagonal counterparts, making it challenging embed carbon-based nanostructures in controllable manner. Here, we report an on-surface synthesis graphene-like nanoribbons with periodically embedded four- and eight-membered rings. The scanning tunnelling microscopy atomic force...
Research on in‐plane and vertically‐stacked heterostructures of graphene hexagonal boron nitride (h‐BN) have attracted intense attentions for energy band engineering device performance optimization graphene. In this review article, recent advances in the controlled syntheses, interfacial structures, electronic properties, as well novel constructions h‐BN are highlighted. Firstly, diverse synthesis approaches (h‐BN‐G) reviewed, their applications nanoelectronics briefly introduced. Moreover,...
A facile all-chemical vapor deposition approach is designed, which allows both sequentially grown Gr and monolayer MoS2 in the same growth process, thus allowing direct construction of MoS2/Gr vertical heterostructures on Au foils. weak n-doping effect an intrinsic bandgap are obtained from MoS2/Gr/Au via scanning tunneling microscopy spectroscopy characterization. The exciton binding energy accurately deduced by combining photoluminescence measurements. As a service to our authors readers,...
Mass production of high-quality graphene flakes is important for commercial applications. Graphene microsheets have been produced on an industrial scale by chemical and liquid-phase exfoliation graphite. However, strong-interaction-induced interlayer aggregation usually leads to the degradation their intrinsic properties. Moreover, crystallinity or layer-thickness controllability not so perfect fulfill requirement advanced technologies. Herein, we report a quartz-powder-derived vapor...
Grain boundaries (GBs) of hexagonal boron nitride (h-BN) grown on Cu(111) were investigated by scanning tunneling microscopy/spectroscopy (STM/STS). The first experimental evidence the GBs composed square-octagon pairs (4|8 GBs) was given, together with those containing pentagon-heptagon (5|7 GBs). Two types found to exhibit significantly different electronic properties, where band gap 5|7 GB dramatically decreased as compared that 4|8 GB, consistent our obtained result from density...
In-plane heterostructure of hexagonal boron nitride and graphene (h-BN-G) has become a focus research owing to its tunable bandgap intriguing properties. We report herein the synthesis quasi-freestanding h-BN-G monolayer on weakly coupled Ir(111) substrate, where h-BN possess distinctly different heights surface corrugations. An atomically sharp zigzag type boundary been found dominate patching interface between h-BN, as evidenced by high-resolution Scanning tunneling microscopy...
Abstract The existence of defects in 2D semiconductors has been predicted to generate unique physical properties and markedly influence their electronic optoelectronic properties. In this work, it is found that the monolayer MoS 2 prepared by chemical vapor deposition nearly defect‐free after annealing under ultrahigh vacuum conditions at ≈400 K, as evidenced scanning tunneling microscopy observations. However, thermal process ≈900 dominant single sulfur vacancies relatively rare vacancy...
Theoretical research has predicted that ripples of graphene generates effective gauge field on its low energy electronic structure and could lead to zero-energy flat bands, which are the analog Landau levels in real magnetic fields. Here we demonstrate, using a combination scanning tunneling microscopy tight-binding approximation, with vanishing Fermi velocities will form when pseudomagnetic flux per ripple is larger than quantum. Our analysis indicates results bands one direction but not...
The altered metabolism in most tumor cells consists of elevated glucose uptake and increased glycolysis even the presence high oxygen tension. Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is an obligatory enzyme glycolysis. Here, we report that acetylation at lysine 254 (K254) increases GAPDH activity response to glucose. Furthermore, reversibly regulated by acetyltransferase PCAF deacetylase HDAC5. Substitution K254 glutamine compromises ability support cell proliferation growth. Our...
The synthesis of centimeter-scale uniform graphene on Pt foils was accomplished via a traditional ambient pressure chemical vapor deposition (CVD) method. Using scanning electron microscopy (SEM) and Raman spectroscopy, we reveal the macroscopic continuity, thickness, as well defect state as-grown graphene. Of particular importance is that after CVD growth have multifaceted texture, which allows us to explore substrate crystallography effect rate continuity By virtue atomically resolved...
Abstract On‐surface synthesis shows significant potential in constructing novel nanostructures/nanomaterials, which has been intensely studied recent years. The formation of acetylenic scaffolds provides an important route to the fabrication emerging carbon nanostructures, including carbyne, graphyne, and graphdiyne, feature chemically vulnerable sp‐hybridized atoms. Herein, we designed synthesized a tribromomethyl‐substituted compound. By using combination high‐resolution scanning tunneling...
Ladder phenylenes (LPs) composed of alternating fused benzene and cyclobutadiene rings have been synthesized in solution with a maximum length no longer than five units. Longer polymeric LPs not obtained so far because their poor stability insolubility. Here, we report the synthesis linear LP chains on Au(111) surface via dehalogenative [2+2] cycloaddition, which steric hindrance methyl groups 1,2,4,5-tetrabromo-3,6-dimethylbenzene precursor improves chemoselectivity as well orientation...
The chiral charge density wave is a many-body collective phenomenon in condensed matter that may play role unconventional superconductivity and topological physics. Two-dimensional waves provide the building blocks for fabrication of various stacking structures homostructures, which physical properties such as currents anomalous Hall effect emerge. Here, we demonstrate phase manipulation two-dimensional design in-plane homostructures 1T-TaS2. We use Raman spectroscopy to directly monitor...
The active removal of DNA methylation marks is governed by the ten-eleven translocation (TET) family enzymes (TET1–3), which iteratively oxidize 5-methycytosine (5mC) into 5-hydroxymethycytosine (5hmC), and then 5-formylcytosine (5fC) 5-carboxylcytosine (5caC). TET proteins are frequently mutated in myeloid malignancies or inactivated solid tumors. These methylcytosine dioxygenases α-ketoglutarate (αKG)-dependent are, therefore, sensitive to metabolic homeostasis. For example, TET2 activated...
Recent studies show that periodic potentials can generate superlattice Dirac points at energies $\ifmmode\pm\else\textpm\fi{}\ensuremath{\hbar}{\ensuremath{\nu}}_{\mathrm{F}}|\mathbf{G}|/2$ in graphene (where $\ensuremath{\hbar}$ is the reduced Planck constant, ${\ensuremath{\nu}}_{\mathrm{F}}$ Fermi velocity of graphene, and G reciprocal vector). Here, we perform scanning tunneling microscopy spectroscopy a corrugated monolayer on Rh foil. We quasiperiodic ripples nanometer wavelength give...
We report the synthesis of large-scale uniform graphene films on high carbon solubility substrates Rh foils for first time using an ambient-pressure chemical vapor deposition method. find that, by increasing cooling rate in growth process, thickness can be tuned from multilayer to monolayer, resulting different segregation amount atoms bulk surface. The feature was characterized with scanning electron microscopy, Raman spectra, transmission and tunneling microscopy. also that bilayer or...