A5100752726- Liquid Crystal Research Advancements
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Electrowetting and Microfluidic Technologies
- Advanced Optical Imaging Technologies
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Nonlinear Optical Materials Studies
- Biosensors and Analytical Detection
- Advanced Materials and Mechanics
- Transition Metal Oxide Nanomaterials
- Power System Reliability and Maintenance
- Covalent Organic Framework Applications
- Semiconductor Lasers and Optical Devices
- Lightning and Electromagnetic Phenomena
- Gold and Silver Nanoparticles Synthesis and Applications
- 2D Materials and Applications
- Ocular Surface and Contact Lens
- Photoacoustic and Ultrasonic Imaging
- Plant Reproductive Biology
- Electrical Fault Detection and Protection
- Thermal Radiation and Cooling Technologies
- Block Copolymer Self-Assembly
Southern University of Science and Technology
2022-2025
Central South University
2024
Nanyang Technological University
2023-2024
Shenzhen Polytechnic
2023-2024
Wuhan University of Technology
2024
Wuhan University of Science and Technology
2023
Shenzhen Institutes of Advanced Technology
2023
State Grid Corporation of China (China)
2023
Bay Medical Center
2023
Chengdu University of Information Technology
2019
Abstract Uniform magnetite, hematite, and goethite nanocrystals were prepared through an attractive method based on oleic acid/alcohol/water system. By adjusting the synthetic parameters (base concentration, alcohol content, categories of alcohols, etc.), controlled synthesis uniform can be easily achieved. Detailed investigations effect experimental morphology final products phase transitions among phases carried out. Finally, a doping other metal ions into magnetite was developed magnetic...
Dual-ion batteries (DIBs) have been attracting great attention for the storage of stationary energy due to their low cost, environmental friendliness, and high working voltage. However, most reports on DIBs involve low-mass-loading electrodes (<2.5 mg), while use mass-loading (>10 mg cm-2 ), which are critical practical application, is overlooked. Herein, an integrated free-standing functional carbon positive electrode (named MSCG) with a "point-line-plane" hierarchical architecture at level...
Abstract In this Full Paper, a water/alcohol/oleic acid system was developed to prepare NaYF 4 nanocrystals with predictable size, shape and phase. The structural kinetic factors that govern the phase evolution of have been carefully studied, influence NaF Y 3+ ratio, reaction time temperature on as‐prepared samples systematically investigated discussed. It found ratio responsible for while key control nanocrystals. This study would be suggestive precisely controlled growth inorganic...
We develop a fluorinated phenyl-tolane based nematic mixture NJU-LDn-4 and evaluate its frequency-dependent birefringence utilizing terahertz time domain spectroscopy (THz-TDS). A large mean of 0.306 is obtained in broad range from 0.4 to 1.6 THz, with maximum 0.314 at THz. Furthermore, relation between molecular structures property discussed. This work reveals new insights for tailing liquid crystal molecules desirable THz range, which extremely meaningful the design fabrication fast,...
Abstract Smart photovoltaic windows (SPWs) are functional devices possessing the capabilities of electrical power output, energy saving, and privacy protection by managing sunlight under external stimuli potentially applicable in fields energy‐saving buildings, automobiles, switchable optoelectronics. However, long response time, low conversion efficiency (PCE), poor stability cycling performance, monostimuli responsive behavior restrict their practical applications. To address these issues,...
In this work, formamidine acetate (FAAc) was introduced in the two-step method to regulate perovskite crystallization and passivate defects, which resulted achieving PCE of device exceeding 24% with notable improvements stability.
In a high soil resistivity area, counterpoise wires are applied to decrease the grounding resistance of tower devices. If conductor wire is very long, although power frequency device decreased, lightning protection performance transmission line still not good. The influences length electrodes on transient characteristic were analyzed. dynamic and nonlinear effect ionization around electrode was considered in analysis model characteristics for under impulse. has an effective when passes...
Abstract Understanding brain functions requires visualization of cerebral hemodynamics with a high spatiotemporal resolution. Recent advances utilize various scanning schemes to promote the imaging speed photoacoustic microscopy for label‐free hemodynamic imaging. However, due insufficient utilization laser pulses, recording satisfactory resolution still remains challenge. Here, 3‐axis optical scanner is employed develop high‐efficiency (HePAM) investigation in cortex. The scan engine...
A dual-frequency liquid crystal polarization grating is fabricated by photoalignment and demonstrated as an optical switch. high diffraction efficiency up to 95% obtained for a single first order with circular incident polarization. Via merely alternating the frequency of applied electric field, switch On Off time reach 350 μs 550 μs, respectively. This work supplies new design fast-response high-efficiency merits easy fabrication low power consumption.
Abstract Perovskite nanocrystals (PNCs) are emerging luminescent materials due to their fascinating physic‐optical properties. However, sensitive surface chemistry with organic polar solvents, oxygen, and moisture greatly hinders developments towards practical applications. Herein we promote silica‐passivated PNCs (SP‐PNCs) by in situ hydrolyzing the ligands of (3‐aminopropyl) triethoxysilane. The resultant SP‐PNCs possesses a high quantum yield (QY) 80 % precipitable such as ethanol...
Abstract Smart photovoltaic windows (SPWs) are an emerging green technology presenting energy‐saving by combining solar irradiance regulation and energy harvesting. The SPWs integrating extraordinary performance, stable controllable operational mode, diverse functionality essential for devising high efficiency buildings (ESBs). However, the attainment of such features has yet to be realized in current iterations SPWs. Herein, a conceptual demonstration split‐type broadband modulation,...
A flat microlens array whose focal length can be switched from positive to negative by electric field is demonstrated experimentally and confirmed computer simulations. To generate the required gradient refractive index, an inhomogeneous created a spherical indium-tin-oxide (ITO) electrode which imbedded in top substrate. The bottom substrate has planar ITO on its inner surface. thin polymeric layer overcoated of create disclination lines are eliminated. Because employed dual-frequency...
Two types of gels using dual-frequency liquid crystal are demonstrated. The one a homogeneous cell shows anisotropic scattering behavior while the other prepared without polyimide alignment layers exhibits isotropic properties. Both highly transparent in voltage-off state. Light occurs when high frequency voltage is applied. gel contrast ratio and submillisecond response time. Potential applications these for switchable polarizer, telecom optical switch, reflective displays emphasized.
We demonstrated a submillisecond response time and low-voltage variable optical attenuator (VOA) using dual-frequency liquid crystal. The dynamic range of the VOA reaches 43 dB at 1.55 µm wavelength. A normally on with flat wavelength is obtained phase compensation cell. Fast rise decay times are achieved low-frequency overdrive high-frequency undershoot voltages. Other approaches to further improve VOA's performances discussed.
Colloidal perovskite quantum dots (PQDs) have emerged as highly promising single photon emitters for information applications. Presently, most strategies focused on leveraging confinement to increase the nonradiative Auger recombination (AR) rate enhance single-photon (SP) purity in all-inorganic CsPbBr
Dual-frequency addressed hybrid-aligned nematic (HAN) liquid crystal cell is demonstrated as a variable optical attenuator at 1.55μm wavelength. By controlling the low- and high-frequency electric field, dual-frequency (DFLC) molecules can be reoriented parallel or perpendicular to substrates so that maximum obtainable phase modulation doubled. In comparison homogeneous cell, DFLC HAN shows lower operating voltage faster response time. Furthermore, exhibits three stable states have some...
The strength of electrostatic interactions (EIs) between electrons and holes within semiconductor nanocrystals profoundly affects the performance their optoelectronic systems, different devices demand distinct EI active medium. However, achieving a broad range fine-tuning for specific applications is daunting challenge, especially in quasi two-dimensional core-shell nanoplatelets (NPLs), as epitaxial growth inorganic shell along direction thickness that solely contributes to quantum confined...
The surface pining effects on phase separation dynamics of polymer-dispersed liquid crystals (PDLCs) with thin cell gaps are demonstrated. Comparing various boundary conditions, the inner surfaces substrates or without polyimide layers [but no rubbing] cannot provide enough anchoring force, so in either case crystal (LC) droplets flow and coalesce to form larger less uniform droplets. However, if coated rubbed energy >1x10-4 J/m2, almost all nucleated LC grow at a fixed position during...
Optical axial scanning is essential process to obtain 3D information of biological specimens. To realize optical without moving, the tunable lens a solution. However, conventional lenses usually induce non-uniform magnification and resolution issues. In this paper, we report movable electrowetting optofluidic lens. Unlike lens, our proposed has two liquid-liquid (L-L) interfaces, which can move in cell by an external voltage. The object distance image are adjusted shifting L-L interface...
Abstract Perovskite nanocrystals (PNCs) are emerging luminescent materials due to their fascinating physic‐optical properties. However, sensitive surface chemistry with organic polar solvents, oxygen, and moisture greatly hinders developments towards practical applications. Herein we promote silica‐passivated PNCs (SP‐PNCs) by in situ hydrolyzing the ligands of (3‐aminopropyl) triethoxysilane. The resultant SP‐PNCs possesses a high quantum yield (QY) 80 % precipitable such as ethanol...
Conventional optofluidic lens usually has only one interface, which means that the zoom range is small, and ability to correct aberrations poor. In this paper, we propose a hybrid driving variable-focus lens. It water-oil interface shifted by an applied voltage tunable Polydimethylsiloxane (PDMS) deformed pumping liquid in or out of cavity. The proposed combines advantages electrowetting mechanical Therefore, it can provide large focal length tuning with good image quality. shortest positive...