A5090605046- Surface Modification and Superhydrophobicity
- Infection Control and Ventilation
- COVID-19 and healthcare impacts
- Adhesion, Friction, and Surface Interactions
- Climate Change and Health Impacts
- Pickering emulsions and particle stabilization
- Catalytic Processes in Materials Science
- Enhanced Oil Recovery Techniques
- Force Microscopy Techniques and Applications
- Advancements in Solid Oxide Fuel Cells
- Semiconductor materials and devices
- Transition Metal Oxide Nanomaterials
- Thermal Radiation and Cooling Technologies
- Polymer composites and self-healing
- Recycling and utilization of industrial and municipal waste in materials production
- Fluid Dynamics and Thin Films
- Advanced battery technologies research
- Thermal Regulation in Medicine
- Coal and Its By-products
- Advanced materials and composites
- Supercapacitor Materials and Fabrication
- Photochromic and Fluorescence Chemistry
- Advanced Battery Materials and Technologies
- Electrohydrodynamics and Fluid Dynamics
- Glass properties and applications
Institute of Materials Research and Engineering
2019-2025
Agency for Science, Technology and Research
2019-2025
Abstract Phase change materials (PCMs) are promising thermal energy storage due to their high specific latent heat. Conventional PCMs typically exploit the solid–liquid (s–l) transition. However, leakage and leaching common issues for PCMs, which have be addressed before usage in practical applications. In contrast, solid–solid (s–s) would naturally overcome these inherent form stability homogeneity. this study, we report a new type of s–s PCM based on chemically linked polyethylene glycol...
Thermochromic materials are substances that change color in response to temperature variations. Today, sustainability concerns the main drivers of thermochromic research, with smart, energy-efficient windows being one primary applications. While vanadium oxides and leuco dyes traditionally materials, hydrogels operating based on solvation have risen as some most promising due their high optical transparency good solar modulating abilities. In this work, a distinct mechanism for...
Abstract Controlling how a material interacts with light is key to optimizing its optical properties fit desired function or application. The most straightforward approach chemically physically modify the surface exposed incident light. An effective method of modification based on addition core‐shell structures at surface. Of particular importance many technological applications are dimensions comparable wavelengths extending from UV up near‐IR region electromagnetic spectrum, which...
There is a huge interest in developing superrepellent surfaces for antifouling and heat-transfer applications. To characterize the wetting properties of such surfaces, most common approach to place millimetric-sized droplet measure its contact angles. The adhesion friction forces can then be inferred indirectly using Furmidge’s relation. While easy implement, angle measurements are semiquantitative cannot resolve variations on surface. Here, we attach micrometric-sized an atomic force...
High-entropy ceramics hold promise for application as thermal barrier coating materials. However, a key challenge in practical applications lies the low fracture toughness compared to that of yttria-stabilized zirconia (YSZ). Herein, we designed (Hf,Zr,Ce,M)O2−δ–Al2O3 (M = Y, Ca, and Gd) ceramic composites by following set fundamental guidelines. First-principles calculations predicted inclusion Al2O3 compositions containing other four binary oxides decreased propensity single high-entropy...
<title>Abstract</title> Engineering sapphire substrates with specific surface characteristics is crucial for the epitaxial growth of high-quality wafer-scale transition metal dichalcogenides (TMDs), essential integration semiconductor industry processes. Here, we address gap in understanding air-induced structure transformation such engineered surfaces and their impact on WS<sub>2</sub>. We identified a deactivation pathway fresh atomic-step-engineered (α-Al<sub>2</sub>O<sub>3</sub>) when...
Abstract Activating the lattice oxygen can significantly improve kinetics of evolution reaction (OER), however, it often results in reduced stability due to bulk structure degradation. Here, we develop a spinel Fe 0.3 Co 0.9 Cr 1.8 O 4 with active by high‐throughput methods, achieving high OER activity and stability, superior benchmark IrO 2 . The oxide exhibits an ultralow overpotential (190 mV at 10 mA cm −2 ) outstanding for over 170 h 100 Soft X‐ray absorption‐ Raman‐spectroscopies,...
An aqueous suspension of silica nanoparticles or nanofluid can alter the wettability surfaces, specifically by making them hydrophilic and oil-repellent under water. Wettability alteration nanofluids has important technological applications, including for enhanced oil recovery heat transfer processes. A common way to characterize is measuring contact angles an droplet with without nanoparticles. While easy perform, angle measurements do not fully capture changes surface. Here, we employed...
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...
Facing shortages of personal protective equipment, some clinicians have advocated the use barrier enclosures (typically mounted over head, with and without suction) to contain aerosol emissions from coronavirus disease 2019 (COVID-19) patients. There is, however, little evidence for its usefulness. To test effectiveness such a device, we built manikin that can expire micron-sized aerosols at flow rates close physiological conditions. We then placed inside enclosure used laser sheet visualize...
We evaluate the outward and inward protections of different mask types (N95, surgical two cloth designs) taking into account imperfect fit on wearer. To this end, we built a manikin to simulate exhaling, coughing inhaling aerosol droplets 0.3–5.0 µ m in diameters. The depend many factors, including droplet size, presence filter layer. Here, show that masks with non-woven layer can achieve combined between 50% 90%. Removing greatly reduces protection efficiency below 20% for smallest size....
Abstract Activating the lattice oxygen can significantly improve kinetics of evolution reaction (OER), however, it often results in reduced stability due to bulk structure degradation. Here, we develop a spinel Fe 0.3 Co 0.9 Cr 1.8 O 4 with active by high‐throughput methods, achieving high OER activity and stability, superior benchmark IrO 2 . The oxide exhibits an ultralow overpotential (190 mV at 10 mA cm −2 ) outstanding for over 170 h 100 Soft X‐ray absorption‐ Raman‐spectroscopies,...
Abstract Facing shortages of personal protective equipment, some clinicians have advocated the use barrier enclosures (typically mounted over head, with and without suction) to contain aerosol emissions from coronavirus disease 2019 (COVID-19) patients. There is however little evidence for its usefulness. To test effectiveness such a device, we built manikin that can expire micron-sized aerosols at flow rates close physiological conditions. We then placed inside enclosure used laser sheet...
Surface wettability has a huge influence on its functional properties. For example, to minimize smudging, surfaces should be able repel oil droplets. To quantify surface wettability, the most common approach is measure contact angles of liquid droplet surface. While well-established and relatively easy perform, angle measurements are crude imprecise; moreover, they cannot spatially resolve heterogeneities that can contribute fouling. address these shortcomings, we report using an Atomic...
An aqueous suspension of silica nanoparticles or nanofluid can alter the wettability surfaces, specifically by making them hydrophilic and oil-repellent under water. Wettability alteration nanofluids have important technological applications, including for enhanced oil recovery heat transfer processes. A common way to characterize is measuring contact angles an droplet with without nanoparticles. While easy perform, angle measurements do not fully capture changes surface. Here, we employed...