A5100419644- Methane Hydrates and Related Phenomena
- CO2 Sequestration and Geologic Interactions
- Spacecraft and Cryogenic Technologies
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- Advanced Fiber Laser Technologies
- Research studies in Vietnam
- Advanced MEMS and NEMS Technologies
- Inorganic Fluorides and Related Compounds
- Environmental and Agricultural Sciences
- Water Resources and Sustainability
- Evaluation Methods in Various Fields
- Photonic Crystal and Fiber Optics
- Force Microscopy Techniques and Applications
- Coal Properties and Utilization
- Carbon Dioxide Capture Technologies
- Zeolite Catalysis and Synthesis
- Regional Economic and Spatial Analysis
- Flood Risk Assessment and Management
- Carbon Nanotubes in Composites
- Physical Activity and Education Research
- Landslides and related hazards
Shenzhen University
2014-2023
National Taiwan University
2012-2023
Nanjing Tech University
2023
Hefei University
2023
Shenzhen Technology University
2019-2023
Beilstein-Institut
2023
Beijing National Laboratory for Molecular Sciences
2019
Peking University
2019
China Railway Group (China)
2017
Hohai University
2009-2012
Abstract Micromanipulation and biological, material science, medical applications often require to control or measure the forces asserted on small objects. Here, we demonstrate for first time microprinting of a novel fiber-tip-polymer clamped-beam probe micro-force sensor examination biological samples. The proposed consists two bases, clamped beam, force-sensing probe, which were developed using femtosecond-laser-induced two-photon polymerization (TPP) technique. Based finite element method...
The sensors measuring torsion, refractive index, and temperature are demonstrated, based on an improved helical long-period fiber gratings (HLPFG), in which the refractive-index torsion sensitivity were significantly enhanced by reducing grating diameter. This was achieved using velocity difference between two translational stages as optical heated a hydrogen-oxygen flame. As diameter decreases from 109 to 85 μm, sensor's at RI of 1.444 increases -1210.20 -3133.80 nm/RIU, -245.80 -942.77...
Abstract Ultrasensitive nanomechanical instruments, e.g. atomic force microscopy (AFM), can be used to perform delicate biomechanical measurements and reveal the complex mechanical environment of biological processes. However, these instruments are limited because their size feedback system. In this study, we demonstrate a miniature fiber optical probe (FONP) that detect properties single cells in vivo tissue measurements. A FONP operate air liquids was developed by programming...
One intriguing idea for the simultaneous recovery of energy and sequestration global warming gas is proposed by transformation methane hydrates to carbon dioxide with injection liquid CO(2). Here we use molecular dynamics simulations show that replacement can take place without melting network hydrogen-bonded water molecules. Depending on distance interface between CO(2) solid clathrate hydrate, find occurs either via direct swapping or a transient co-occupation both in one cavity. Our...
The growth of carbon dioxide hydrates and the mechanism are studied using molecular dynamics simulations. melting temperatures at different pressures determined a three-phase model consisting liquid phase, water solid hydrate phase. simulations then performed temperature (260 K) below point. It is found that rate CO2 slightly decrease with pressure, from 0.132 m/s 3 MPa to 0.096 100 under supercooling 25 K. be largely similar methane hydrates. One remarkable difference occurrence...
The structure, thermodynamic, and kinetic properties of methane hydrates formed from the aqueous solution sodium chloride are investigated based on molecular dynamics simulations. A three-phase model consisting a slab hydrate phase, liquid water containing chloride, gas phase molecules is used. decrease in coexisting temperatures (by 2-3 K) at different pressures (10-100 MPa) for NaCl solutions (about 2 mol %) confirms thermodynamic inhibition NaCl. growth rate found to be half one-third...
A novel probe-type FPI-based fiber optic hydrogen sensor with a graphene–Au–Pd sandwich structure film and FBG is proposed experimentally demonstrated in this study.
The formation of the first nondisappearing cluster in CH<sub>4</sub> + THF mixed guest clathrate hydrate nucleation.
Perovskite quantum dots (QDs) have gained significant attention for both fundamental research and commercial applications because of their outstanding optoelectronic properties tremendous application potentials. Reducing defect density in all-inorganic perovskite QDs is great importance performance enhancement. In this work, it found that the UV-NIR femtosecond laser pulse treatments could increase photoluminescence yield (PLQY) CsPbBr3 from 71 to 95%. Such an enhancement be attributed...
Here we present a predictive method for the change in three-phase (vapor–liquid–hydrate) equilibrium condition of gas hydrates upon introduction organic inhibitors and electrolytes. The Peng–Robinson–Stryjek–Vera (PRSV) equation state, combined with COSMO-SAC activity coefficient liquid model through modified Huron–Vidal (MHV1) mixing rule, is used to describe fluid phase, van der Waals Platteeuw (vdW–P) hydrate crystalline phase. temperature-dependent Langmuir absorption constants vdW–P are...
Tetrahydrofuran (THF) is an effective promoter of methane hydrates, and itself with water can form clathrate hydrates even without the presence gas. In this work, stability limit kinetic properties THF were simulated using molecular dynamics (MD) simulations. The change in dissociation temperature pressure concentration aqueous phase well reproduced MD rate growth found to exhibit a maximum value when liquid-phase about 0.3–0.8 times (depending on temperature) hydrate phase. existence some...
Molecular dynamics (MD) simulations are performed to analyze the dominating factors for growth of CH4 + THF mixed hydrates, and results compared with single guest hydrates. While hydrate has a type I crystalline structure, presence in aqueous phase II structure hydrate. Compared system enhances dissociation temperature. The rate exhibits maximum value at about 290 K 10 MPa. is found be determined by two competing factors: (1) adsorption solid–liquid interface, which enhanced decreasing...
We demonstrate a passively mode-locked erbium-doped fiber laser (EDFL) by using the smallest single-walled carbon nanotubes (SWNTs) with diameter of 0.3 nm as saturable absorber. These ultrasmall SWNTs are fabricated in elliptical nanochannels ZnAPO4-11 (AEL) single crystal. By placing an AEL crystal into EDFL cavity pumped 980 diode, stable passive mode-locking is achieved for threshold pump power 280 mW and 73 ps pulses at 1563.2 repetition rate 26.79 MHz.
Nanomechanical bolometers have proven to be well suited the analysis of light. However, conventional wafer-based devices limited practical applications because they require special vacuum chambers, cryogenic temperatures, bulky space optical components, and/or complex circuitry. The present work developed a nanoscale optomechanical bolometer intended for photothermal sensing using an all-optical actuation and measurement approach. proposed is compact has integrated all-optical-fiber...
Nanomechanical sensors made from suspended graphene are sensitive to pressure changes. However, these devices typically function by obtaining an electrical signal based on the static displacement of a membrane and so, in practice, have limited sensitivity operational range. The present work demonstrates optomechanical Au/graphene membrane-based gas sensor with ultrahigh sensitivity. This comprises appended section hollow-core fiber form sealed Fabry-Pérot cavity. In contrast conventional...
A gas pressure sensor, based on a phase-shifted fiber Bragg grating (PS-FBG) modulated by hollow cavity, is proposed and demonstrated in this Letter. The device was fabricated fusing hollow-core (HCF) between two single-mode fibers (SMFs) exhibiting FBGs that were inscribed using line-by-line femtosecond (fs) laser etching. pair of micro-channels drilled orthogonally into the HCF an fs to allow argon get out freely. Such sensor exposes high spectrum finesse, e.g., <mml:math...
In this work, a predictive method is applied to determine the vapor–liquid-hydrate three-phase equilibrium condition of methane hydrate in presence ionic liquids and other additives. The Peng–Robinson–Stryjek–Vera Equation State (PRSV EOS) incorporated with COSMO-SAC activity coefficient model through first order modified Huron–Vidal (MHV1) mixing rule used evaluate fugacities vapor liquid phases. A van der Waals Platteeuw describe phase. absolute average relative deviation predicted...
Abstract A probe-shaped sensor for simultaneous temperature and pressure measurement was reported in this article. The effective length of the ∼2mm, consisting a fiber Bragg grating (FBG) Fabry-Perot interferometer (FPI) with nano silica diaphragm. response sensitivities were measured as −0.98 nm/MPa 11.10 pm/°C, respectively. This had an extremely low cross-sensitivity between temperature, which provided significant potential dual-parameter sensing.