A5072864302- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Laser-Matter Interactions and Applications
- Carbon and Quantum Dots Applications
- Advanced Fiber Optic Sensors
- Advanced biosensing and bioanalysis techniques
- Magnetic properties of thin films
- Nanocluster Synthesis and Applications
- Advanced Photocatalysis Techniques
- Solid State Laser Technologies
- Nonlinear Photonic Systems
- Quantum Dots Synthesis And Properties
- Multiferroics and related materials
- 2D Materials and Applications
- Immune Cell Function and Interaction
- Nonlinear Waves and Solitons
- Soil Carbon and Nitrogen Dynamics
- Oceanographic and Atmospheric Processes
- Ferroelectric and Piezoelectric Materials
- Mycorrhizal Fungi and Plant Interactions
- Magnetic and transport properties of perovskites and related materials
- T-cell and B-cell Immunology
- Electrocatalysts for Energy Conversion
- Plant biochemistry and biosynthesis
- Conducting polymers and applications
Shandong Management University
2025
Shandong University
2025
Henan University
2025
National Medical Products Administration
2024
Collaborative Innovation Center of Chemistry for Energy Materials
2021-2024
Fudan University
2020-2024
Tongji University
2024
Hainan University
2024
Xiamen University
2024
Lanzhou Institute of Chemical Physics
2021-2024
Carbon quantum dots (CQDs) are attracting tremendous interest owing to their low toxicity, water dispersibility, biocompatibility, optical properties and wide applicability. Herein, CQDs with an average diameter of (4.0 ± 0.2) nm high crystallinity were produced simply from the electrochemical oxidation a graphite electrode in alkaline alcohols. The as-formed dispersion was colourless but gradually changed bright yellow when stored ambient conditions. Based on UV-Vis absorption, fluorescence...
In this paper, we demonstrate 67 fs pulse emitting with tungsten disulfide (WS2) in mode-locked erbium-doped fiber (EDF) lasers. Using the pulsed laser deposition method, WS2 is deposited on surface of tapered to form evanescent field. The fiber-taper saturable absorber (SA) large modulation depth fabricated support ultrashort generation. influences SA are analyzed through contrastive experiments lasers or without SA. duration measured be fs, which shortest obtained two dimensional (2D)...
Abstract The explosive success of graphene opens a new era ultrathin 2D materials. It has been realized that the van der Waals layered materials with atomic and less thickness can not only exist stably, but also exhibit unique technically useful properties including small size effect, surface macro quantum tunnel effect. With extensive research revealing basic optical photophysical materials, series potential applications in devices have continuously demonstrated realized, which immediately...
Constructing hierarchical three-dimensional (3D) mesostructures with unique pore structure, controllable morphology, highly accessible surface area, and appealing functionality remains a great challenge in materials science. Here, we report monomicelle interface confined assembly approach to fabricate an unprecedented type of 3D mesoporous N-doped carbon superstructure for the first time. In this large hollow locates center (∼300 nm diameter), ultrathin monolayer spherical mesopores (∼22 nm)...
Abstract Efficient oxygen evolution reaction electrocatalysts are essential for sustainable clean energy conversion. However, catalytic materials followed the conventional adsorbate mechanism (AEM) with inherent scaling relationship between key intermediates *OOH and *OH, or lattice-oxygen-mediated (LOM) possible lattice migration structural reconstruction, which not favorable to balance high activity stability. Herein, we propose an unconventional Co-Fe dual-site segmentally synergistic...
Abstract In pursuing cheap and effective oxygen reduction catalysts, the Fe/N/C system emerges as a promising candidate. Nevertheless, structural transformations of starting materials into Fe- N-doped carbon catalysts remains poorly characterized under pyrolytic conditions. Here, we explore evolution Fe species track formation Fe–N 4 site development by employing diverse in-situ diagnostic techniques. In-situ heating microscopy reveals initial FeO x nanoparticles subsequent internal...
Two-dimensional (2D) materials with potential applications in photonic and optoelectronic devices have attracted increasing attention due to their unique structures captivating properties. However, generation of stable high-energy ultrashort pulses requires further boosting these materials’ optical properties, such as higher damage threshold larger modulation depth. Here we investigate a new type heterostructure material uniformity by employing the magnetron sputtering technique....
Abstract Herein, a conceptually new and straightforward aqueous route is described for the synthesis of hydroxyl‐ amino‐functionalized boron nitride quantum dots (BNQDs) with yields (QY) as high 18.3 % by using facile bottom‐up approach, in which mixture boric acid ammonia solution was hydrothermally treated one pot at 200 °C 12 h. The functionalized BNQDs, excellent photoluminescence properties, could be easily dispersed an medium applied fluorescent probes detection ferrous (Fe 2+ ) ferric...
A facile and effective approach for the preparation of functionalized born nitride quantum dots (BNQDs) with blue fluorescence was explored by hydrothermal treatment mixture boric acid melamine at 200 °C 15 h. The as-prepared BNQDs were characterized transmission electron microscopy (TEM), high-resolution TEM, atomic force microscopy, X-ray photoelectron spectroscopy, UV–vis spectroscopy. single layered average size 3 nm showed a light emission under illumination UV light. could be easily...
Exploration of novel optical features, generation mechanisms, and versatile applicability boron nitride quantum dots (BNQDs) is still in nascent stage. Herein, BNQDs are prepared using liquid exfoliation–solvothermal treatment bulk BN three different solvents. The photoluminescence blue ethanol (or N , ‐dimethylformamide (DMF)) green ‐methyl‐2‐pyrrolidone (NMP) under the same UV‐irradiation, respectively. yields (QYs) average lateral sizes 12.6% 4.1 ± 0.2 nm, 16.4%, 2.8 0.3 as well 21.3% 2.0...
Tungsten oxide (WO3-x ), a new alternative to conventional semiconductor material, has attracted numerous attentions owning its widespread potential applications. Various methods have been reported for the synthesis of WO3-x nanostructures such as nanowires or nanodots. However, templates surfactants are often required synthesis, which significantly complicate process and hinder broad Herein, one-pot template/surfactant-free solvothermal method is proposed synthesize including fluorescent...
In this paper, a WSe2 film prepared by chemical vapor deposition (CVD) is transferred onto tapered fiber, and saturable absorber (SA) fabricated. order to measure the third-order optical nonlinearity of WSe2, Z-scan technique applied. The modulation depth SA measured as being 21.89%. Taking advantage remarkable nonlinear absorption characteristic SA, mode-locked erbium-doped fiber laser demonstrated at 1557.4 nm with bandwidth 25.8 signal noise ratio 96 dB. To best our knowledge, pulse...
The laser induced damage threshold and modulation depth of SAs are prominently improved with WSe<sub>2</sub> films.
Abstract The exploration of promising nonlinear optical materials, which allows for the construction high-performance devices in fundamental and industrial applications, has become one fastest-evolving research interests recent decades plays a key role development innovation optics future. Here, by utilizing nonlinearity recently synthesized, two dimensional material AuTe 2 Se 4/3 prepared self-flux method, passively mode-locked fiber laser operating at 1557.53 nm is achieved with 147.7 fs...
Two-dimensional materials have been widely used as optical modulator in mode-locked fiber lasers. In terms of the performance laser, one with an ultrashort pulse and high stability has great commercial value. Herein, MoSe2 grown by chemical vapor deposition (CVD) method modulation depth, quality lattice structure uniformity is successfully applied a erbium-doped laser. The duration signal-to-noise ratio laser are 207 fs 85 dB, respectively. multifarious comparisons indicate that CVD-based...
In this Letter, high-quality WS2 film and MoS2 were vertically stacked on the tip of a single-mode fiber in turns to form heterostructure (WS2-MoS2-WS2)-based saturable absorbers with all-fiber integrated features. Their nonlinear absorption properties remarkable, such as large modulation depth (∼16.99%) small intensity (6.23 MW·cm-2). Stable pulses at 1.55 μm duration short 296 fs average power high 25 mW obtained an erbium-doped laser system. The results demonstrate that proposed...
Transition metal dichalcogenides have recently been considered the candidates for saturable absorption materials due to their advantages in both electronic and optoelectronic. Compared with MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> WS , MoTe exhibits smaller bandgap. As a result, owns inherent near-infrared applications. In this paper, absorber (SA) were prepared by magnetron sputtering deposition method. Owing enhanced...
Saturable absorption may be induced at critical pumping power by nonlinear optical effects of nanomaterials, thereby making it possible to generate a high-power ultrafast laser. Recently, Bi4Br4 is theoretically predicted member topological insulators and expected promising candidate for saturable absorbers (SAs). We show here that features large modulation depth 42.3%. The Bi4Br4-based SA enables mode-locking operation the near-infrared range, as demonstrated 1.5 μm fiber laser with...
Allogeneic hematopoietic stem cell transplantation is a widely used and effective therapy for malignant diseases numerous other disorders. High-resolution human leukocyte antigen (HLA) haplotype frequency distributions not only facilitate individual donor searches but also determine the probability with which particular patient can find HLA-matched donors in registry. The frequencies of HLA-A, -B, -C, -DRB1, -DQB1 alleles haplotypes were estimated among 169,995 Chinese volunteers using...