High-efficiency particle trapping in microdroplet array has wide applications fields such as biomedical and chemical engineering. Using a closed chip, consisting of top hydrophobic surface bottom bioinspired hydrophilic micropore with rounded sidewalls, the droplet generation mechanism within bionic chip is numerically experimentally studied. During contact between liquid micropore, sidewalls facilitate rupture interface, enhancing stability generated array. By analyzing quasi-static process...

Recently, humidity sensors have been investigated extensively due to their broad applications in chip fabrication, health care, agriculture, amongst others. We propose a capacitive sensor with shielding electrode under the interdigitated (SIDE) based on polyimide (PI). Thanks electrode, this combines high sensitivity of parallel plate and fast response sensors. use COMSOL Multiphysics design optimize SIDE structure. The experimental data show very good agreement simulation. is 0.0063% ±...

In the field of one-step efficient preparation dewetting droplet arrays, process is hampered by requirement for low chemical wettability solid surfaces, which restricts complete transition wetting state and its broad prospects in biological applications. Inspired physical structure lotus leaf, enabling it to promote change infiltration an aqueous solution on surface, we developed a method fabrication arrays biomimetic structural chip designed present work. This greatly reduces need...

Abstract The division of aqueous samples into microdroplet arrays has many applications in biochemical and medical analysis. Inspired by biological features, we propose a method to produce picoliter droplet for single-cell analysis based on physical structure interface. A 0.9 pL array with an RSD (relative standard deviation) less than 6.3% density 49,000 droplets/cm 2 was successfully generated PDMS chip (polydimethylsiloxane) from micromachined glass mold. generation principle the wetting...

The coffee-ring effect is a process that takes place when tiny drop of liquid-containing particles disappears, resulting in distinct deposit around the edge spill resembling ring. One primary causes this uneven distribution due to dissimilar evaporation rates on droplet surface and contact line pinning effects. In research, microwell with gradual structure has been developed regularize slippery Wenzel wettability control particle distribution. mobility lines during are greatly influenced by...

The real-time continuous-flow PCR inside a 3D spiral microchannel is realized by novel self-activated microdroplet generation/transport mechanism.

The convenient division of aqueous samples into droplets is necessary for many biochemical and medical analysis applications. In this article, we propose the design a cost-effective droplet generator potential bio-chemical application, featuring two symmetric tubes. new revisits relationship between capillary components liquid flow rates. size generated by prototype depends only on dimensions, without precisely needing to control external conditions or driving pressure, even when relative...

An analytical model is proposed in this paper for optimizing the breakdown voltage (BV) and drift region doping concentration of a silicon-on-insulator (SOI) lateral power device with step width technique high- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${k}$ </tex-math></inline-formula> dielectric (SWHK device). By solving 3-D Poisson equation, potential electric field distribution are investigated....

Separating aqueous samples into large numbers of independent micro-droplets enables efficient study single cells and detection molecules. However, as the droplet size becomes smaller, reinforced handling process is possibly required to ensure droplets operability, resulting in increased experimental complexity. Herein, we propose a method imitating bio-structure lotus leave reversal generate picoliter array effectively. This bio-inspired structure made material PDMS (polydimethylsiloxane)...

Moisture content in transformer oil is an important index for equipment condition. Based on technical requirement of on-line monitoring moisture content, this paper presents a water solubility estimation method using least square technique. Water distribution and analyzed, the Karl-Fischer adopted to determine one sample; then, temperature relative saturation are collected by sensors. According empirical relation temperature, formula finally determined method, which ensures measurement...

Defects and functional groups on ligands in metal organic frameworks affect porosity surface area, which successively impacts the proton mobility.

Abstract Aircraft are affected by aerodynamic loads during operation. To analyze the impact of leading edge structure aircraft under different flight angles attack, this paper uses fluid-heat-solid coupling calculation method. It combines CFD with thermal-structure field solver and simulation software, a altitude 15 km, speed 6 Ma, Angle attack 0 ~ 20°. Considering change material parameters temperature, multiple physical fields in is simulated analyzed. The results show that existence angle...

It is conducive to ensuring the safety and reliability of power system that timely accurate evaluation large generator. A composite method fault probability for generator based on multi-characteristic parameters proposed in this paper, it can be employed solve difficult problem how occurrence modes evaluated process evaluation. Firstly, set characteristic established basis induction arrangement a number operation experiences preventive test code Secondly, according features parameters, two...

Dissolved-gas-analysis (DGA) techniques are widely used to diagnose oil-filled transformer insulation, but the conventional procedure acquiring gas-in-oil concentrations is not timely. To make up disadvantage, a new method based on genetic algorithm and grey theory predict proposed in This work. The model (GM(1,1)) has been improved optimized (GM(1,1,/spl beta/)) constructed. applied search optimal parameters of GM(1,1,/spl beta/) model. validity GA-based was verified with two prediction examples.

Compartmentalization of aqueous samples into micro-droplets enables to study single cells or detect molecules by performing large number independent experiments. However, as the droplet size becomes smaller, surface energy larger so that micro-channels treatments are required break droplets below picoliter range, resulting in an increased experimental chemical complexity. Herein, we spontaneous liquid film breakup observed after smearing a mother on lotus leave reversal. As breaks and...

In this research, Dendrobium officinale was studied at different storage temperatures for water loss, soluble solids, titratable acids, membrane permeability, malonaldehyde (MDA) changes. Results showed that weight loss rate positively associated with temperature, the higher of more severe and quality dendrobium stem lower. Dendrobium’s acid content, solids content changed slowly than 10°C, 20°Cwhen it stored in 0°C temperature but their were 20°C samples . Storage is correlated change...