A5100669855- Graphene research and applications
- Advanced Materials and Mechanics
- Carbon Nanotubes in Composites
- Thermal properties of materials
- Advanced Sensor and Energy Harvesting Materials
- Force Microscopy Techniques and Applications
- Cellular and Composite Structures
- 2D Materials and Applications
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- Graphene and Nanomaterials Applications
- Nanopore and Nanochannel Transport Studies
- Boron and Carbon Nanomaterials Research
- Soft Robotics and Applications
- Micro and Nano Robotics
- Calcium Carbonate Crystallization and Inhibition
- Thermal Radiation and Cooling Technologies
- Bone Tissue Engineering Materials
- Nanowire Synthesis and Applications
- Advanced Battery Materials and Technologies
- Structural Analysis and Optimization
- Diamond and Carbon-based Materials Research
- Mechanical and Optical Resonators
- Electrocatalysts for Energy Conversion
- Ferroelectric and Negative Capacitance Devices
Xi'an Jiaotong University
2015-2024
State Key Laboratory of ASIC and System
2021-2023
Fudan University
2021-2023
Shanghai Fudan Microelectronics (China)
2021-2023
Huawei Technologies (China)
2023
Nanjing University of Aeronautics and Astronautics
2021-2022
Zhejiang University
2022
State Key Laboratory of Silicon Materials
2022
Southeast University
2022
China University of Petroleum, Beijing
2021-2022
Through experimental study, we reveal superlubricity as the mechanism of self-retracting motion micrometer sized graphite flakes on platforms by correlating respectively lock-up or self-retraction states with commensurate incommensurate contacts. We show that scale-dependent loss self-retractability is caused generation contact interfacial defects. A HOPG structure also proposed to understand our observations, particularly in term polycrystal structure. The realisation scale experiments will...
Abstract Graphene has an extremely high in-plane strength yet considerable out-of-plane softness. High crystalline order of graphene assemblies is desired to utilize their properties, however, challenged by the easy formation chaotic wrinkles for intrinsic Here, we find intercalation modulated plasticization phenomenon, present a continuous stretching method regulate spontaneous sheets into orders, and fabricate papers with Hermans’ 0.93. The paper exhibits superior mechanical (tensile 1.1...
A sheared microscopic graphite mesa retracts spontaneously to minimize interfacial energy. Using an optical knife-edge technique, we report first measurements of the speeds such self-retracting motion (SRM) from $\mathrm{mm}/\mathrm{s}$ range at room temperature $25\text{ }\text{ }\mathrm{m}/\mathrm{s}$ $235\text{ }\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. This remarkably high speed is comparable with upper theoretical limit found for sliding interfaces exhibiting structural...
The possibility of employing a zeolite nano-membrane for seawater desalination is studied using comprehensive molecular dynamics simulations. Two types with different wetting properties, the hydrophilic FAU and hydrophobic MFI, are used as reverse osmosis (RO) membrane. Both can reach nearly 100% rejection salt ions, when membrane thickness smaller than 3.5 nm, permeability about 2 × 10−9 m Pa−1 s−1, which two orders magnitude higher that commercial state-of-the-art RO relation between...
Developing inexpensive and highly efficient CO2 air capture technologies is an important solution for solving the greenhouse problem. In this work, we used low-cost quaternized chitosan (QCS)/poly(vinyl alcohol) (PVA) hybrid aerogels with quaternary ammonium groups hydroxide ions to reversibly from ambient by humidity swing. The capacity adsorption rate of were investigated over temperature range 10–30 °C. was measured be about 0.18 mmol/g, which 38% higher than state-of-the-art commercial...
Nanoporous graphene holds great promise in the application of filtration such as seawater desalination, gas separation, and ionic channels. In this paper, we study mechanical properties nanoporous with different size, shape, density nanopore. The strength decreases size porosity nanopore increases. However, rough edges has significant influence to where blunt tip perpendicular loading direction higher strength. effective tensile modulus is only determined by ΔE ∼ -p0.64, while nanopore, for...
Stimuli-responsive fusion and fission are widely observed in both bio-organizations artificial molecular assemblies. However, the design of a system with structure property persistence during repeated remains challenging. We show reversible wet-spun graphene oxide (GO) fibers, which number macroscopic fibers can fuse into thicker one also separate original individual under stimulation solvents. The dynamic geometrical deformation GO fiber shells, caused by solvent evaporation infiltration,...
Aggregation of two-dimensional (2D) nanosheet fillers in a polymer matrix is prevalent problem when the filler loading high, leading to degradation physical and mechanical properties composite. To avoid aggregation, low-weight fraction 2D material (<5 wt %) usually used fabricate composite, limiting performance improvement. Here, we develop interlocking strategy where well-dispersed high filling content (up 20 boron nitride nanosheets (BNNSs) can be incorporated into polytetrafluoroethylene...
Carbon nanotube networks feature outstanding mechanical performance, and also hierarchical structures network topologies. In this paper we investigate their structure–property relationship through mesoscale molecular dynamics simulations. We find that microstructures undergo remarkable evolution under loads. The correlation between applied strain, microstructural failure mechanism, especially the bundling process of bridging carbon nanotubes, is discussed based on simulation results. Based...
In this work, we perform molecular dynamics (MD) simulations to study the effect of rippling on Poisson's ratio graphene. Due atomic scale thickness graphene, out-of-plane ripples are generated in free standing graphene with topological defects (e.g. heptagons and pentagons) release in-plane deformation energy. Through MD simulations, have found that rippled decreases upon increasing its aspect η (amplitude over wavelength). For sheet = 0.188, a negative −0.38 is observed for tensile strain...
Abstract Frictional behavior of a nanoscale tip sliding on superlattice aligned graphene/(hexagonal boron nitride) h ‐BN heterostructure is found to be strongly regulated by the moiré superlattices, resulting in long‐range stick‐slip modulation experimental measurements. Through molecular dynamics simulations, it shown that origin moiré‐level comes from strong coupling between in‐plane deformation and out‐of‐plane distortion superlattice. The periodicity decreases as interfacial twist angle...
Abstract The assembly of different levels structure from the nano‐ to macroscale has produced materials with outstanding performance. Here, using graphene as a model building block, fabrication multiscale structures is reported, tailorable features spanning seven orders magnitude in size by 3D printed template‐directed method which combines ability customize meso‐ digital light processing and microscale self‐assembly. It shown that careful design structures, number extraordinary properties...
Natural materials teach that mechanical dissipative interactions relieve the conflict between strength and toughness enable fabrication of strong yet tough artificial materials. Replicating natural nacre structure has yielded rich biomimetic materials; however, stronger interlayer dissipation still waits to be exploited extend performance limits Here, we introduce entanglement as a new mechanism fabricate entangled with superior toughness, across molecular nanoscale structures. The graphene...