A5033871264- Surface Modification and Superhydrophobicity
- Advanced Sensor and Energy Harvesting Materials
- Fluid Dynamics and Heat Transfer
- Adhesion, Friction, and Surface Interactions
- Icing and De-icing Technologies
- Electrowetting and Microfluidic Technologies
- Electrohydrodynamics and Fluid Dynamics
- Conducting polymers and applications
- Modular Robots and Swarm Intelligence
- Solar-Powered Water Purification Methods
- Thermal Radiation and Cooling Technologies
- Aerosol Filtration and Electrostatic Precipitation
- nanoparticles nucleation surface interactions
- Innovative Microfluidic and Catalytic Techniques Innovation
- Nanomaterials and Printing Technologies
- Aerogels and thermal insulation
- Fluid Dynamics and Thin Films
- Analytical Chemistry and Sensors
- Microfluidic and Bio-sensing Technologies
- Atmospheric chemistry and aerosols
- Advanced Thermoelectric Materials and Devices
- MXene and MAX Phase Materials
- Aeroelasticity and Vibration Control
- Robotic Path Planning Algorithms
- Acoustic Wave Phenomena Research
City University of Hong Kong
2000-2024
Hong Kong Polytechnic University
2024
City University of Hong Kong, Shenzhen Research Institute
2021
Chinese Academy of Sciences
2017-2020
Institute of Chemistry
2017-2020
University of Chinese Academy of Sciences
2017-2018
Significance The manipulation of liquid droplets plays a crucial role in multidisciplinary applications. However, existing methods still face many challenges, such as short distance, low velocity, restricted operating conditions, the need for extra responsive additives droplet, and so on. To circumvent these constraints, here we develop droplet electrostatic tweezer to trap or faithfully guide motion remote manner. Our method allows high flexibility precision manipulating different types,...
Manipulating liquid is of great significance in fields from life sciences to industrial applications. Owing its advantages manipulating liquids with high precision and flexibility, electrowetting on dielectric (EWOD) has been widely used various Despite this, efficient operation generally needs electrode arrays sophisticated circuit control. Here, we develop a largely unexplored triboelectric wetting (TEW) phenomenon that can directly exploit the charges achieve programmed precise water...
Abstract Harvesting energy from water, in the form of raindrops, river, and ocean waves, is considerable importance has potential applications self‐powered electronic devices large‐scale needs. Recently, droplet‐based electricity generator shown an increase by several orders magnitude electrical output, overcoming drawback traditional device limited interfacial effects. Despite this exciting result, output performance novel relatively low frequency impinging droplets owing to formation a...
Water collection by dew condensation emerges as a sustainable solution to water scarcity. However, the transient process that involves droplet nucleation, growth, and transport imposes conflicting requirements on surface properties. It is challenging satisfy all benefits for different stages simultaneously. By mimicking structures functions of moss Rhacocarpus, here, we report attainment dropwise efficient even hydrophilic gated liquid suction mechanism. The Rhacocarpus-inspired porous...
Abstract As the most common but indispensable matter to humankind, water usually stays in a macroscopically electric neutral state. Due its inherent molecular polarity, however, can be easily electrified, which builds connection between and electricity. Such coupling of electricity abounds deep scientific basics technological applications. The past several decades have witnessed extensive progress studying mutual effects water, comprehensive review fundamentals applications is still largely...
Abstract Developing robust technologies to harvest energy from ambient environments is critical applications in self‐powered electronics. As a promising candidate, droplet‐based electricity generators with transistor‐inspired architecture, which consist of electrodes and dielectric material, have manifested superior capacity gain sustainable water. Despite extensive achievement, these devices are significantly limited by insufficient flexibility unstable performance owing the presence...
Taxis is an instinctive behavior of living organisms to external dangers or benefits. Here, we report a taxis-like associated with liquid droplets on charged substrates in response the stimuli, referred as droplet electrotaxis. Such electrotaxis enables us use either solid (such water) matter, even human finger, stimuli spatiotemporal precisely manipulate various physicochemical properties, including water, ethanol low surface tension, viscous oil, and so on. Droplet also features flexible...
Abstract Liquid-solid contact electrification (CE) is essential to diverse applications. Exploiting its full implementation requires an in-depth understanding and fine-grained control of charge carriers (electrons and/or ions) during CE. Here, we decouple the electrons ions liquid-solid CE by designing binary superhydrophobic surfaces that eliminate liquid ion residues on simultaneously enable us regulate surface properties, namely work function, electron transfers. We find existence a...
The evaporation process involves the most significant amount of energy transfer on Earth. Various hydrovoltaic techniques have been proposed to convert into electricity, but they mainly rely streaming potential that suffers from limitations low voltage output. Herein, we report an alternative strategy for harvesting by using water latent heat and triboelectric effect. We use a natural, evaporation-driven engine inspired drinking bird toy slow-frequency motion then mechanical electricity via...
Maintaining both high static liquid repellency and large dynamic pressure resistance is highly preferred for a myriad of applications, such as energy conversion, anti-icing, antifouling. However, these two merits are mutually exclusive in conventional surface design: Sparse structures with reduced solid–liquid contact area yield repellency, which turn inevitably suffer from poor wetting properties exemplified by low easy Cassie-to-Wenzel transition. Here, we circumvent this trade-off...
Abstract Programmable droplet manipulation based on external stimulation is in high demand various modern technologies. Despite notable progress, current strategies still suffer from a common drawback such as single control means of modulating the input, which leads to huge challenges sophisticated and large scale‐up handling. Herein, unique pattern‐reconfiguration‐driven method developed conductive/nonconductive pattern surfaces under charge deposition. Contactless deposition induces “edge...
Condensation freezing inhibition is of great practical importance for anti-icing applications; however, no coatings with this performance have been reported. Here, we report the condensation on patterned polyelectrolyte coatings, including brush (PB), multilayer (PEM), and hydrogel (PH) surfaces, benefiting from their feature in regulating ice nucleation propagation via changing counterions. On reported can be initiated exclusively at domains polyelectrolytes; moreover, spontaneous achieved...
Abstract Ice and frost buildup continuously pose significant challenges to multiple fields. As a promising de-icing/defrosting alternative, designing photothermal coatings that leverage on the abundant sunlight source earth facilitate ice/frost melting has attracted tremendous attention recently. However, previous designs suffered from either localized surface heating owing limited thermal conductivity or unsatisfied meltwater removal rate due strong water/substrate interaction. Herein, we...
Splash, one of the most visually apparent droplet dynamics, can manifest on any surface above a certain impact velocity, regardless wettability. Previous studies demonstrate that elevating substrate temperature suppress splash, which is unfavorable for many practical applications, such as spray cooling and combustion. Here, we report suppression effect splash nullified by utilizing surfaces with nanostructures. By manipulating air evacuation time through nanostructures, have identified...
Abstract Ice propagation is of great importance to the accumulation ice/frost on solid surfaces. However, no investigation has been reported tuning ice through a simple coating process. Herein, we study behavior polyelectrolyte multilayer (PEM) surfaces coated with layer‐by‐layer (LBL) deposition approach. We discover that strongly dependent amount water in outermost layer PEMs, is, rate increases layer. The can be tuned by up three orders magnitude changing pairs, counterions polymer layer,...
Abstract Static repellency and pressure resistance to liquids are essential for high‐performance super‐omniphobic surfaces. However, these two merits appear mutually exclusive in conventional designs because of their conflicting structural demands: liquid necessitates minimal solid–liquid contact, which turn inevitably undercuts the surface's ability resist invasion exerted by elevated pressure. Here, inspired Springtail , can be simultaneously realized structuring surfaces at size scales,...
Various hydration states of PB lead to a difference ice propagation rate up five orders magnitude.
The rapid detachment of liquid droplets from engineered surfaces in the form complete rebound, pancake bouncing, or trampolining has been extensively studied over past decade and is practical importance many industrial processes such as self-cleaning, anti-icing, energy conversion, so on. spontaneous needs an additional low-pressure environment manifestation bouncing on superhydrophobic requires meticulous control macrotextures impacting velocity. In this work, we report that pancake-like...