A5006304366- Surface Modification and Superhydrophobicity
- Adhesion, Friction, and Surface Interactions
- Force Microscopy Techniques and Applications
- Polymer Surface Interaction Studies
- Fluid Dynamics and Heat Transfer
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- biodegradable polymer synthesis and properties
- Advanced Battery Materials and Technologies
- Covalent Organic Framework Applications
- COVID-19 and healthcare impacts
- Additive Manufacturing and 3D Printing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Infection Control and Ventilation
- Electrohydrodynamics and Fluid Dynamics
- Advanced battery technologies research
- 3D IC and TSV technologies
- Advanced Photocatalysis Techniques
- Thermal Regulation in Medicine
- Advanced Thermoelectric Materials and Devices
- Electronic Packaging and Soldering Technologies
- Silkworms and Sericulture Research
- Gas Sensing Nanomaterials and Sensors
- Fiber-reinforced polymer composites
- Material Properties and Processing
Agency for Science, Technology and Research
2015-2025
Institute of Materials Research and Engineering
2015-2025
King Abdullah University of Science and Technology
2023
Abstract Surface wetting is a multiscale phenomenon where properties at the macroscale are determined by features much smaller length scales, such as nanoscale surface topographies. Traditionally, of surfaces quantified macroscopic contact angle that liquid droplet makes, but this approach suffers from various limitations. In recent years, several techniques have been developed to address these shortcomings, ranging direct measurements pinning forces using cantilever-based force probes...
Abstract Modern human societies are highly dependent on plastic materials, however, the bulk of them non‐renewable commodity plastics that cause pollution problems and consume large amounts energy for their thermal processing activities. In this article, a sustainable cellulose hydroplastic material its composites, can be shaped repeatedly into various 2D/3D geometries using just water introduced. wet state, high flexibility ductility make it conducive shaping to take place. ambient...
Abstract Aqueous zinc (Zn)‐based structural batteries capable of both electrochemical energy storage and mechanical load‐bearing capabilities are attractive for next‐generation future electric vehicles due to their eco‐friendliness, non‐toxic, safe nature. However, parasitic free water activities plague aqueous Zn‐based batteries, detrimental the performance longevity cell. Developing polymer gel electrolytes is a notable potential solution, but they usually have poor electrode interfacial...
Abstract Recently, there has been much progress in the design and application of oil-repellent superoleophobic surfaces. Polyzwitterionic brush surfaces are particular interest, because their ability to repel oil under water, even absence micro-/nanostructures. The origin this underwater superoleophobicity is attributed presence a stable water film beneath droplet, but had not demonstrated experimentally. Here, using optical interferometric techniques, we show that an droplet effectively...
Embedded 3D printing of PVA hydrogels (PVA-Hy) was demonstrated via alkali-induced physical crosslinking (NaOH, 4% w/w), which enabled by simultaneous salt-induced stabilization aqueous two-phase system (ATPS).
Abstract The presence of toxic organic pollutants in aquatic environments poses significant threats to human health and global ecosystems. Photocatalysis that enables situ production activation H 2 O presents a promising approach for pollutant removal; however, the processes potentially compete active sites charge carriers on photocatalyst surface, leading limited catalytic performance. Herein, hierarchical 2D/2D heterojunction nanosphere composed ultrathin BiOBr BiOI nanosheets (BiOBr/BiOI)...
Abstract Aqueous zinc (Zn)‐based structural batteries, combining electrochemical energy storage with mechanical load‐bearing capabilities, are promising for next‐generation electric vehicle due to their eco‐friendly and safe nature. However, challenges such as dendrite formation, anode corrosion, parasitic reactions limits practical application. Polymer electrolytes, particularly hydrogels, can mitigate these limitations, but typically possess poor properties that jeopardizes robustness....
Abstract Hypoxia, inflammatory response and pathogen (bacterial or viral) infection are the three main factors that lead to death in patients with acute lung injury (ALI). Among them, hypoxia activates expression of HIF‐1α, further exacerbating production ROS response. Currently, anti‐inflammatory elimination treatment strategies have effectively alleviated infectious pneumonia, but improving still faces challenges. Here, a vancomycin‐loaded nanoventilator (SCVN) containing superoxide...
Organic thermoelectrics have attracted widespread attention due to the possibility of harnessing ambient thermal energy power Internet-of-things and wearables their flexibility, low cost, large-scale production, but research progress still lags behind that inorganic materials. Rigid ladder-type conjugated polymers consisting double-stranded fused-ring structure exhibit excellent electrochemical stabilities thus are promising materials for organic thermoelectrics. However, effective...
The functional properties of a surface, such as its anti-fogging or anti-fouling performance, are influenced by wettability. To quantify surface wettability, the most common approach is to measure contact angles liquid droplet on surface. While well established and relatively easy perform, angle measurements were developed describe macroscopic wetting difficult perform for submillimetric droplets. Moreover, they cannot spatially resolve heterogeneities that can contribute fouling. address...
Abstract Controlling the wetting and spreading of microdroplets is key to technologies such as microfluidics, ink‐jet printing, surface coating. Contact angle goniometry commonly used characterize by droplets, but technique ill‐suited for high contact angles close . Here, we attach a micrometric‐sized droplet an atomic force microscope cantilever directly quantify droplet–solid friction on different surfaces (superhydrophobic underwater superoleophobic) with sub‐nanonewton resolutions. We...
Poly(butylene succinate) (PBS) is a biodegradable aliphatic polyester and semicrystalline in nature. It has wide range of engineering applications owing to its attractive combination good processability mechanical properties. PBS nanocomposites with graphene nanosheets were prepared by melt compounding. We report on their structure thermal, electrical, The thermal stability the nanocomposite increased 35°C compared that neat PBS. crystallization melting behavior matrix presence dispersed...
All-polymer bulk heterojunction (BHJ) thermoelectrics with balanced charge transport were demonstrated for the first time. The BHJ blend can be p- or n-doped, and a full thermoelectric cell was constructed.
A water droplet can bounce off superhydrophobic surfaces multiple times before coming to a stop. The energy loss for such rebounds be quantified by the ratio of rebound speed UR and initial impact UI; i.e., its restitution coefficient e = UR/UI. Despite much work in this area, mechanistic explanation rebounding droplets is still lacking. Here, we measured submillimeter- millimeter-sized impacting two different over wide range UI (4-700 cm s-1). We proposed simple scaling laws explain...
Many zwitterionic polymer brushes exhibit highly stimuli-responsive properties stemming from the strong dipole and electrostatic interaction of their building blocks. Here, we showed how a combination two atomic force microscopy (AFM) modes can reveal layered structure poly(sulfobetaine methacrylate) synthesized by surface-initiated atom-transfer radical polymerization. Due to polydispersity anti-polyelectrolyte effect, diffused layer emerges on top condensed brush as function salt...
We show that for hydrophobic surfaces, the normalized detachment force F d /π R is equivalent to Young–Dupre work of adhesion γ (cos θ r + 1).
Abstract When submerged under water, polyelectrolyte brush surfaces become highly oil‐repellent. This is due to the ability of charged moieties on polymer backbone retain strong hydration shells. Despite their technological relevance, there no rational design principle for optimizing oil‐repellent performance hydrophilic brushes. Using droplet probe atomic force microscopy, interaction forces between an oil and different brushes are measured. It shown that most repellent when repulsive...
Herein, we report a new n-type ladder-type conjugated polymer, dichlorinated poly(benzimidazoanthradiisoquinolinedione) (Cl2–BAL), that possesses slightly twisted polymer backbone and preferred edge-on orientation. Upon n-doping, its maximum electrical conductivity power factor in thermoelectric devices reached 1.1 ± 0.07 S cm–1 3.52 0.37 μW m–1 K–2, respectively, is almost on par with the best performing BBL. As compared to our previously reported tetrachlorinated analogue Cl4–BAL, results...
Here, we compare the impact of solvent content and temperature on dielectric conductivity properties sunflower seed cake. Two different experimental conditions were adopted in this study: permittivity-frequency isothermal spectroscopy cakes at temperatures ranging from 30 to 45C; impedance-frequency with various contents, 10 50 wt%. Experimental results revealed that increasing or cake wt% 45C, samples increase by around eight times (from 3.52 × 10−6 2.73 10−5 S/m) six 1.35 10−4 7.7 S/m),...