Multifunctional superhydrophobic nanocomposite surfaces based on photocatalytic materials, such as fluorosilane modified TiO2, have generated significant research interest. However, there are two challenges to forming multifunctional with stable properties: the oxidation of hydrophobic functional groups, which leads permanent loss superhydrophobicity, well photoinduced reversible hydrolysis catalytic particle surface. Herein, we report a simple and inexpensive template lamination method...

Fabricating robust superhydrophobic surfaces for commercial applications is challenging as the fine-scale surface features, necessary to achieve superhydrophobicity, are susceptible mechanical damage. Herein, we report a simple and inexpensive lamination templating method create polymer with excellent abrasion resistance water pressure stability. To fabricate surfaces, polyethylene films were laminated against woven wire mesh templates. After cooling, was peeled from creating 3D array of...

This Article describes the synthesis and physicomechanical properties of bioplastics prepared from methyl ω-hydroxytetradecanoic acid (Me-ω-OHC14), a new monomer available by fermentation process using an engineered Candida tropicalis strain. Melt-condensation experiments were conducted titanium tetraisopropoxide (Ti[OiPr]4) as catalyst in two-stage polymerization (2 h at 200 °C under N2, 4 220 0.1 mmHg). Poly(ω-hydroxytetradecanoate), P(ω-OHC14), Mw, determined SEC-MALLS, increased 53K to...

Condensation of water vapor is an essential process in power generation, collection, and thermal management. Dropwise condensation, where condensed droplets are removed from the surface before coalescing into a film, has been shown to increase heat transfer efficiency collection ability many surfaces. Numerous efforts have made create surfaces which can promote dropwise including superhydrophobic on highly mobile. However, challenge with using such condensing environments that hydrophobic...

An apparatus has been designed and constructed to characterize thermal interface materials with unprecedented precision sensitivity. The design of the is based upon a popular implementation ASTM D5470 where well-characterized meter bars are used extrapolate surface temperatures measure heat flux through sample under test. Measurements resistance, effective conductivity, electrical resistance can be made simultaneously as functions pressure or thickness. This unique in that it takes advantage...

Superhydrophobic surfaces are known to exhibit reduced viscous drag due slip associated with a layer of air trapped at the liquid-solid interface. It is expected that this will lead turbulent skin-friction in external flows higher Reynolds numbers both laminar and regimes. Results presented from experiments exploring effect. Large-area test have been fabricated tested water tunnel, measuring transitional regimes velocities up 1.4 m/s. Drag reduction approximately 50% observed for flow. Lower...

Maintaining the long-term stability of superhydrophobic surfaces is challenging because contamination from organic molecules and proteins that render surface hydrophilic. Reactive oxygen species generated on a photocatalyst, such as TiO2, could mitigate this effect by oxidizing these contaminants. However, incorporation catalyst particles into become hydrophilic under UV exposure, causing to transition Wenzel state. Here we show high concentration TiO2 catalytic nanoparticles can be...

Soiling of solar cover glass is a significant challenge that increases the levelized cost electricity photovoltaic energy through loss electrical output and/or increased operation and maintenance costs. Hydrophobic coatings can reduce cleaning, but an external source cleaning water still required. Dew, however, be harnessed to create self-cleaning surface. To efficiently use condensation (i.e., natural dew) surface, we fabricated hybrid hydrophobic-hydrophilic coating, with array isolated...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCopper chloride complexes with poly(2-vinylpyridine): preparation and redox propertiesA. M. Lyons, J. Vasile, E. Pearce, V. WaszczakCite this: Macromolecules 1988, 21, 11, 3125–3134Publication Date (Print):November 1, 1988Publication History Published online1 May 2002Published inissue 1 November 1988https://pubs.acs.org/doi/10.1021/ma00189a001https://doi.org/10.1021/ma00189a001research-articleACS PublicationsRequest reuse permissionsArticle...

We describe here a physical-organic study of the first triphasic superhydrophobic sensitizer for photooxidations in water droplets. Control synthetic parameters enables mechanistic "borderline" two- and three-phase surfaces where (1)O2 is generated compartments that are wetted, partially or remain dry plastron (i.e., air layer beneath droplet). The surface synthesized by embedding silicon phthalocyanine (Pc) sensitizing particles to specific locations on polydimethylsiloxane (PDMS) posts...

A microphotoreactor device was developed to generate bubbles (1.4 mm diameter, 90 μL) containing singlet oxygen at levels toxic bacteria and fungus. As decays rapidly triplet oxygen, the leave behind no waste or byproducts other than O(2). From a comparative study in deaerated, air saturated, oxygenated solutions, it reasoned that inactivate Escherichia coli Aspergillus fumigatus, mainly by an gradient inside outside of bubble such is solvated diffuses through aqueous solution until reacts...

The fabrication and properties of superhydrophobic surfaces that exhibit ratchet-like anisotropic slip angle behavior is described. surface composed arrays poly(dimethylsiloxane) (PDMS) posts fabricated by a type 3D printing. By controlling the dispense parameters, regular asymmetric were deposited such slope was varied from 0 to 50 relative normal. Advancing receding contact angles as well measured function post droplet volume. Ratchetlike anisotropy observed on sloped features. maximum...

The design and characterization of monolithic heat sinks, which can take the form complex structures, is reported. designs were conceived to augment transport for enhanced air cooling by exploiting clearly identified physical mechanisms, i.e., streaming flow through a 2-D array polygonal ducts, introducing flow-obstacle-induced local mixing, hydrodynamic instabilities sustain unsteadiness. Fabrication these unconventional was achieved 3-D printing plastic patterns converting them into copper...

Singlet oxygen is a potent agent for the selective killing of wide range harmful cells; however, current delivery methods pose significant obstacles to its widespread use as treatment agent. Limitations include need photosensitizer proximity tissue because short (3.5 μs) lifetime singlet in contact with water; strong optical absorption photosensitizer, which limits penetration depth; and hypoxic environments that restrict concentration available oxygen. In this article, we describe novel...

Soiling of solar cover glass can result in a significant loss electrical output PV panels. Dust and other contaminants adhere strongly to the by known mechanisms. In contrast, anti-soiling coatings, mechanisms which they function, are not well-characterized. this paper, we examine properties KleanBoostTM thin anti-reflective fluoropolymer coating for glass. particular, effect dew baking cycles on dust accumulation optical transparency. A "herding" process was observed as condensed water...

The rise of antimicrobial resistance poses a critical public health threat worldwide. While photodynamic therapy (aPDT) has demonstrated efficacy against multidrug-resistant (MDR) bacteria, its effectiveness can be limited by several factors, including the delivery photosensitizer (PS) to site interest and development bacterial PS uptake. There is need for alternative methods, one which superhydrophobic (SH-aPDT), we report here. SH-aPDT technique that isolates on (SH) membrane, generating...