A5066660982- 2D Materials and Applications
- Graphene research and applications
- Advanced Photocatalysis Techniques
- MXene and MAX Phase Materials
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Topological Materials and Phenomena
- Copper-based nanomaterials and applications
- Electronic and Structural Properties of Oxides
- Nanowire Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Molecular Junctions and Nanostructures
- Metal-Organic Frameworks: Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Ferroelectric and Negative Capacitance Devices
- Nanocluster Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Surface and Thin Film Phenomena
- Advanced Memory and Neural Computing
- Boron and Carbon Nanomaterials Research
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Machine Learning in Materials Science
- Physics of Superconductivity and Magnetism
- Iron-based superconductors research
Hubei University
2019-2024
McMaster University
2023-2024
Liaocheng University
2021-2023
Yangzhou University
2021-2023
Chinese University of Hong Kong, Shenzhen
2023
Xidian University
2021-2023
Huazhong University of Science and Technology
2005-2020
Tulane University
2019
Suzhou Institute of Nano-tech and Nano-bionics
2019
Chinese Academy of Sciences
2019
We present the results of a thorough study wet chemical methods for transferring vapor deposition grown graphene from metal growth substrate to device-compatible substrate. On basis these results, we have developed "modified RCA clean" transfer method that has much better control both contamination and crack formation does not degrade quality transferred graphene. Using this method, high device yields, up 97%, with narrow performance metrics distribution were achieved. This demonstration...
In this work, we compare the electrical characteristics of MoS2 field-effect transistors (FETs) with Ag source/drain contacts those Ti and demonstrate that metal–MoS2 interface is crucial to device performance. FETs show more than 60 times higher ON-state current contacts. order better understand mechanism performance contacts, 5 nm Au/5 (contact layer) or film was deposited onto monolayers few layers, topography metal films characterized using scanning electron microscopy atomic force...
Topological insulators are unique electronic materials with insulating interiors and robust metallic surfaces. Device applications exploiting their remarkable properties have so far been hampered by the difficulty to electrically tune Fermi levels of both bulk thin film samples. Here we show experimentally that single-crystal nanowires topological insulator Bi2Se3 can be used as conduction channel in high-performance field effect transistor (FET), a basic circuit building block. Its...
MoS2 is considered as a good non-precious-metal co-catalyst for photocatalytic hydrogen generation, but its high activity requires people to modulate electronic structure or design morphology of MoS2-related composite. X-MoS2/g-C3N4 composites were prepared at different content ammonium tetrathiomolybdate and used catalysts generation. The results revealed that the H2 0.3-MoS2/g-C3N4 with 0.3 mmol 40 thiourea much better than others. With an annealing treatment in liquid nitrogen, obtained...
Studies on highly efficient noble-metal-free catalysts are regarded as an important task for H2 production by water-splitting. MoS2/ZnCdS/ZnS dual heterostructures were successfully prepared with respective supernatant MoS2 colloidal solutions (called M/ZC/Z) and precipitates (M(p)/ZC/Z). Scanning electron microscopy (SEM) transmission (TEM) images of the M/ZC/Z sample showed that ZnS nanosheets decorated ZnCdS nanorods few-layered MoS2. Then, photocatalytic hydrogen study was performed...
The discovery of ferromagnetism in two-dimensional (2D) van der Waals crystals has generated widespread interest. seeking robust 2D ferromagnets with high Curie temperature (Tc) is vitally important for next-generation spintronic devices. However, owing to the enhanced spin fluctuation and weak exchange interaction upon reduced dimensionalities, exploring Tc > 300 K highly demanded but remains challenging. In this work, we fabricated air-stable Cr5Te8/CrTe2 vertical heterojunctions above 400...
Owing to the capacity of efficiently harvesting and converting incident energy, localized surface-plasmon resonance noble metals was introduced into a metal-semiconductor design for promoting hydrogen evolution. In this study, plasmonic nanodumbbell structure employed strategically modulate energy transfer in water reduction reaction. A maximum H2 evolution rate 80 μmol g-1 h-1 obtained Au-TiO2 nanodumbbells, further improvement achieved through surface modification with Pt nanoparticles...
Coordination polymers (CPs) have recently emerged as promising candidates for heterogeneous photocatalysis due to their structural designability and tunable properties. Herein, we developed two novel Ag(I)-calix[4]arene coordination with the formula {[Ag2(μ-NO3)L1]}n (CP 1) {[AgL1]·PF6}n 2) (L1 = 2-mercapto-5-methyl-1,3,4-thiadiazole resorcinol calix[4]arene). Crystallography revealed that anion self-inclusion behavior induced cavitand silver ions self-assemble into well-defined CPs 1 2...
When layered transition-metal dichalcogenides (TMDs) are scaled down from a three- to 2D geometry, electronic and structural transitions occur, leading the emergence of properties not usually found in bulk. Here, we report systematic Raman study exfoliated semi-metallic WTe2 flakes with thickness ranging few layers single layer. A dramatic change spectra occurs between monolayer few-layer as vibrational mode centered at ~86.9 cm−1 splits into two active modes 82.9 89.6 bilayer. Davydov...
Two-dimensional MoS2 has been widely used as hydrogen evolution reaction (HER) cocatalyst to load onto nanostructured semiconductors for visible light-response photocatalytic production. However, its another important role light harvester because of the band-gap tunable property and beneficial band position rarely exploited. Herein, few layer-thick nanoflakes with extended absorption over range 400 680 nm a HER rate 0.98 mmol/h/g have obtained. Then 7-nm-sized Cd0.5Zn0.5S quantum dots (QDs)...
In this work, multi-bit flash-like memory cell based on Si nanowire field-effect transistor and multiple Ta2O5 charge-trapping stacks have been fabricated fully characterized. The cells exhibited staircase, discrete charged states at small gate voltages. Such one is attractive for high density. These non-volatile devices fast programming/erasing speed, excellent retention, endurance, indicating the advantages of integrating multilayer charge-storage channel. high-performance can be...
Gate assisted contact-end Kelvin test structures and gate four-probe have been designed fabricated to measure the field effects of current crowding at source/drain contacts top-gate MoS2 effect transistors. The transistors exhibited n-type transistor characteristics. contact resistance was measured by using both gate-assisted structures. values these two are significantly different. contact-front obtained from structure is strongly influenced on crowding, while not. metal-MoS2 transfer...
A metal/oxide/molecule/oxide/Si capacitor structure containing redox-active ferrocene molecules has been fabricated for non-volatile memory application. Cyclic voltammetry and X-ray photoelectron spectroscopy were used to measure the in structure, showing that attach on SiO2/Si are functional after device fabrication. These solid-state molecular devices have fast charge-storage speed can endure more than 109 program/erase cycles. This excellent performance is derived from intrinsic...
Although the MoS2/graphene 2D stack achieved a lot of attention in recent research on semiconductor devices, interface interaction between perfect MoS2 and graphene its effects electronic properties are rarely studied. Here, we report our studies Raman spectroscopy photoluminescence heterostructure. A nearly these two materials was with dry transfer forming gas annealing. heterostructure shows that strong leads to blue-shifts modes graphene. Moreover, indicated by photoluminescene...
P-type Ni(OH)2 has been combined with n-type CdS nanorods and nanocrystals for enhanced photocatalytic property due to the p-n junction. Though nanosheets exhibit fast charge transfer large superficial area, decoration of was rarely reported up now. In this work, photo-deposition nanoparticles on ultrathin nanoflakes established efficient H2 generation. By changing irradiation time CdS, reaction between Ni2+ OH− can be controlled different loading density Ni(OH)2. As density-dependent...
In this paper, tantalum pentoxide (Ta <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$_{2}$</tex></formula> O Notation="TeX">$_{5}$</tex></formula> ) has been investigated as the charge-storage dielectric for discrete, multibit memory applications. Two Ta containing stacks, Al xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{3}$</tex></formula> /Ta /SiO and /Al , have fabricated...
As a member of ZrHM (H = Si/Ge/Sn; M O/S/Se/Te) family materials, which were predicted to be the candidates topological Dirac nodal-line semimetals, ZrGeSe exhibited particular properties, such as magnetic breakdown effect in transport measurement, different from its other isostructural compounds, informing an unique topology electronic band structure. However, related experimental research is insufficient until now. Here, we present systematic study structure and Fermi surfaces (FS) by...