A5054462478- Graphene research and applications
- 2D Materials and Applications
- Quantum Information and Cryptography
- Perovskite Materials and Applications
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Quantum Mechanics and Applications
- MXene and MAX Phase Materials
- Quantum and electron transport phenomena
- Spectroscopy and Quantum Chemical Studies
- Carbon Nanotubes in Composites
- Quantum Computing Algorithms and Architecture
- ZnO doping and properties
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Electronic and Structural Properties of Oxides
- Ferroelectric and Piezoelectric Materials
- Quantum optics and atomic interactions
- Diamond and Carbon-based Materials Research
- Copper-based nanomaterials and applications
- Graphene and Nanomaterials Applications
- Quantum Dots Synthesis And Properties
- Advanced Thermodynamics and Statistical Mechanics
- Conducting polymers and applications
Stevens Institute of Technology
2015-2025
Wuhan University
2008-2025
Hubei University of Automotive Technology
2024-2025
Second Affiliated Hospital of Jilin University
2024
Wuhan Institute of Technology
2022-2024
Shanxi University
2024
Dalian Institute of Chemical Physics
2023-2024
Chinese Academy of Sciences
2013-2024
University of Chinese Academy of Sciences
2023-2024
Chongqing University of Technology
2024
Helpful elements: A facile bottom-up method using citric acid and L-cysteine as a precursor has been developed to prepare graphene quantum dots (GQDs) co-doped with nitrogen sulfur. new type high density of surface state GQDs arises, leading yields (more than 70 %) excitation-independent emission. FLQY=fluorescence yield.
We show that under the influence of pure vacuum noise two entangled qubits become completely disentangled in a finite-time, and specific example we find time to be given by ln((2+sqrt[2] / 2) times usual spontaneous lifetime.
Graphene was deposited on a transparent and flexible substrate, tensile strain up to ∼0.8% loaded by stretching the substrate in one direction. Raman spectra of strained graphene show significant red shifts 2D G band (−27.8 −14.2 cm−1 per 1% strain, respectively) because elongation carbon−carbon bonds. This indicates that uniaxial has been successfully applied graphene. We also proposed that, applying graphene, tunable gap at K point can be realized. First-principle calculations predicted...
Graphene has many unique properties that make it an ideal material for fundamental studies as well potential applications. Here we review recent results on the Raman spectroscopy and imaging of graphene. We show can be used a quick unambiguous method to determine number graphene layers. The strong signal single layer compared graphite is explained by interference enhancement model. have also studied effect substrates, top deposition, annealing process, folding (stacking order) physical...
We have clearly discriminated the single-, bilayer-, and multiple-layer graphene (<10 layers) on Si substrate with a 285 nm SiO2 capping layer by using contrast spectra, which were generated from reflection light of white source. Calculations based Fresnel's law are in excellent agreement experimental results (deviation 2%). The image shows reliability efficiency this new technique. spectrum is fast, nondestructive, easy to be carried out, unambiguous way identify numbers layers sheet....
Abstract Nanoflakes of α‐Fe 2 O 3 were prepared on Cu foil by using a thermal treatment method. The nanoflakes characterized X‐ray diffraction, scanning electron microscopy, high‐resolution transmission and Raman spectroscopy. reversible Li‐cycling properties the have been evaluated cyclic voltammery, galvanostatic discharge–charge cycling, impedance spectral measurements cells with Li metal as counter reference electrodes, at ambient temperature. Results show that Fe exhibit stable capacity...
A new development in the dynamical behavior of elementary quantum systems is surprising discovery that correlation between two units information called qubits can be degraded by environmental noise a way not seen previously studies dissipation. This route for dissipation attacks entanglement, essential resource as well central feature Einstein-Podolsky-Rosen so-called paradox and discussions fate Schröinger's cat. The effect has been labeled ESD, which stands early-stage disentanglement or,...
Different C–N bonding configurations in nitrogen (N) doped carbon materials have different electronic structures. Carbon with only one kind of configuration are an excellent platform for studying doping effects on the structure and physical/chemical properties. Here we report synthesis single layer graphene pure pyridinic N by thermal chemical vapour deposition hydrogen ethylene Cu foils presence ammonia. By adjusting flow rate ammonia, atomic ratio C can be modulated from 0 to 16%. The...
Graphene has attracted a lot of interest for fundamental studies as well potential applications. Till now, micromechanical cleavage (MC) graphite been used to produce high-quality graphene sheets on different substrates. Clear understanding the substrate effect is important device fabrication graphene. Here we report results Raman micromechanically cleaved monolayer standard SiO2 (300 nm)/Si, single crystal quartz, Si, glass, polydimethylsiloxane (PDMS), and NiFe. Our data suggests that...
N and S codoping of graphene is realized by a novel approach: covalent functionalization oxide using 2-aminothiophenol as source both followed thermal treatment. The resulting N- S-codoped has potential applications in high-performance lithium-ion batteries metal-free catalyst for oxygen reduction reaction. As service to our authors readers, this journal provides supporting information supplied the authors. Such materials are peer reviewed may be re-organized online delivery, but not...
We demonstrate in straightforward calculations that even under ideally weak noise the relaxation of bipartite open quantum systems contains elements not previously encountered physics. While additivity decay rates is known to be generic for decoherence a single system, we it breaks down coherence simplest composite systems.
Abstract Single‐ and few‐layer transition‐metal dichalcogenide nanosheets, such as WSe 2 , TaS TaSe are prepared by mechanical exfoliation. A Raman microscope is employed to characterize the single‐layer (1L) quinary‐layer (5L) nanosheets single crystals with a laser excitation power ranging from 20 μW 5.1 mW. Typical first‐order together some second‐order combinational modes observed. new peak at around 308 cm −1 observed in except for 1L which might arise interlayer interactions. Red...
Graphene field effect transistors commonly comprise graphene flakes lying on SiO2 surfaces. The gate-voltage dependent conductance shows hysteresis depending the gate sweeping rate/range. It is shown here that exhibit two different kinds of in their electrical characteristics. Charge transfer causes a positive shift voltage minimum conductance, while capacitive gating can cause negative with respect to voltage. hysteretic phenomena decay an increase number layers flakes. Self-heating helium...
Large-area triangular single crystals of WS2 monolayer are synthesised from a chemical vapor deposition process and their optical properties systematicly studied. This work paves the way to fabricate large-area crystalline 2D semiconductors study fundamentals. It must be very meaningful for exploiting great potential future optoelectronics. As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may re-organized online...
Time-resolved fluorescence measurements of graphene oxide in water show multiexponential decay kinetics ranging from 1 ps to 2 ns. Electron-hole recombination the bottom conduction band and nearby localized states wide-range valance is suggested as origin fluorescence. Excitation wavelength dependence was caused by relative intensity changes few emission species. By introducing molecular orbital concept, dominant found originate electronic transitions among/between non-oxidized carbon...
The fabrication of epitaxial graphene (EG) on SiC substrate by annealing has attracted a lot interest as it may speed up the application for future electronic devices. interaction EG and is critical to its physical properties. In this work, Raman spectroscopy was used study structure with substrate. All bands blueshift from that bulk graphite made micromechanical cleavage, which attributed compressive strain induced A model containing $13\ifmmode\times\else\texttimes\fi{}13$ honeycomb...
Abstract We report the synthesis of a novel branched nano‐heterostructure composed SnO 2 nanowire stem and α‐Fe O 3 nanorod branches by combining vapour transport deposition facile hydrothermal method. The epitaxial relationship between branch is investigated high resolution transmission electron microscopy (HRTEM). determined to grow along [101] direction, enclosed four side surfaces. results indicate that distinct crystallographic planes can induce different preferential growth directions...
Highly ordered TiO2@α-Fe2O3 core/shell arrays on carbon textiles (TFAs) have been fabricated by a stepwise, seed-assisted, hydrothermal approach and further investigated as the anode materials for Li-ion batteries (LIBs). This composite TFA exhibits superior high-rate capability outstanding cycling performance. The specific capacity of TFAs is much higher than that pristine (CTs) TiO2 nanorod (TRAs), indicating positive synergistic effect material structural hybridization enhancement...
The false-color (3D type) image of the intensity Raman spectra monolayer MoS2 versus both peak positions and polar angles is plotted. It shows that strongest E2g1+ E2g1− peaks appear at different angles, reflected as alternation maxima within frequency range E2g1 mode, which consequence crystallographic orientation relevant to strain direction predicted by theoretical analysis.
Bio-inspired multifunctional composite films based on reduced poly(vinyl alcohol)/graphene oxide (R-PVA/GO) layers are prepared by a facile solution casting method followed reduction procedure. The resulting with nacre-like, bricks-and-mortar microstructure have excellent mechanical properties, electrical conductivity, and biocompatibility.
In this paper, a highly ordered three‐dimensional Co 3 O 4 @MnO 2 hierarchical porous nanoneedle array on nickel foam is fabricated by facile, stepwise hydrothermal approach. The morphologies evolution of and nanostructures upon reaction times growth temperature are investigated in detail. Moreover, the as‐prepared structures as anodes for both supercapacitors Li‐ion batteries. When used supercapacitors, excellent electrochemical performances such high specific capacitances 932.8 F g −1 at...
The discovery of monolayer superconductors bears consequences for both fundamental physics and device applications. Currently, the growth superconducting monolayers can only occur under ultrahigh vacuum on specific lattice-matched or dangling bond-free substrates, to minimize environment- substrate-induced disorders/defects. Such severe requirements limit exploration novel two-dimensional superconductivity related nanodevices. Here we demonstrate experimental realization in a chemical vapour...