Results 91 to 100 of about 35,379 (304)

Optofluidic microchannels in aerogel [PDF]

Optics Letters, 2011
We report optofluidic waveguides made by filling microchannels in aerogel with water. The aerogel cladding is a nanoporous material with an extremely low refractive index of ~1.05, giving a large index step from the water core. Channels were formed by removing embedded optical fibers, which could be nonuniform or multiple.
Xiao, Limin, Birks, T.A.
openaire   +3 more sources

Strong Lateral Confinement of Hydrophilic Silica Nanoparticles on Mg‐Al Layered Double Hydroxides Nanoflakes for Enhanced Thermal Properties

Advanced Materials Interfaces, EarlyView.
A nanostructured, naturally flame‐retardant, and non‐toxic inorganic composite is introduced, which is laterally associated with silica nanoparticles to induce the restacking of the LDH lamella structure, thereby serving as an efficient thermal insulator.
Gayani Pathiraja, Jeffrey Ayerh, Abhijeet Mali, Md Arifur Rahman Khan, Anna Sheets, Shobha Mantripragada, Sherine O. Obare, Tetyana Ignatova   +7 more
wiley   +1 more source

Morphology‐Controlled Silica Nanoparticle Coatings for Transparent Radiative Cooling

Advanced Materials Interfaces, EarlyView.
Transparent radiative cooling coatings are achieved by immobilizing solid and hollow silica spheres on glass. Particle morphology within sub‐monolayer coatings is shown to govern the trade‐off between visible and atmospheric window reflectance. Hollow‐sphere structures enable reduced thermal emission losses while preserving transparency, highlighting ...
Jefferson A. S. Lam, Kishin Matsumori, Maximillian Theis, Alexander Berger, Nicole Böller, Qimeng Song, Matthieu Gresil, Jacek J. Jasieniak, Markus Retsch   +8 more
wiley   +1 more source

Fabrication and characterization of porous pectin-based aerogels for drug delivery

Carbohydrate Polymer Technologies and Applications
Aerogels are renowned for their exceptional characteristics such as high porosity and ultra-low density. Among these, pectin aerogels, offering biodegradability, low toxicity, and versatility, are prominent candidates for innovative biomedical materials.
Supakij Suttiruengwong, Srisuda Konthong, Sommai Pivsa-Art, Pornsinee Plukchaihan, Pitsopa Meesuwan, Monthira Wanthong, Nuttada Panpradist, Rittin Abraham Kurien, Phakkhananan Pakawanit, Pornsak Sriamornsak   +9 more
doaj   +1 more source

Nanozymes at the Bio‐Nano Interface: From Synthesis, Defect Engineering, Catalytic Behavior in Biological Microenvironments, and Biosafety Implications

Advanced Materials Interfaces, EarlyView.
Nanozymes (NZs) have emerged as versatile artificial enzymes with tunable catalytic properties driven by atomic coordination, defect engineering, and surface chemistry. This review presents a bio–nano interface framework linking synthesis strategies, structural design, and catalytic behavior within complex biological microenvironments.
Karen Guadalupe Quintero‐Garrido, Aída Jimena Velarde‐Salcedo, Alejandro López‐Amador, Noé Arjona, Citlali Uitz Toalá, Carmen Gonzalez, Beatriz Liliana España‐Sánchez   +6 more
wiley   +1 more source

Effect of the Gel Drying Method on Properties of Semicrystalline Aerogels Prepared with Different Network Morphologies

Gels
The purpose of this study was to investigate the effect of different drying methods on the structure and properties of semicrystalline polymer aerogels.
Glenn A. Spiering, Garrett F. Godshall, Robert B. Moore   +2 more
doaj   +1 more source

Printed Organic Thermoelectric Generators: Progress and Challenges Towards Efficient Energy Harvesting

Advanced Materials Technologies, EarlyView.
Printed organic thermoelectric generators (OTEGs) enable flexible and sustainable energy harvesting from low‐grade heat. This Perspective critically assesses recent advances in printable thermoelectric materials, 2D and 3D device architectures, and current performance limits of printed OTEGs.
Vijitha Ignatious, Pietro Rossi, Matteo Massetti, Cecilia Mattevi, Francisco Molina‐Lopez, Mario Caironi   +5 more
wiley   +1 more source

Electrodes Based on Carbon Aerogels Partially Graphitized by Doping with Transition Metals for Oxygen Reduction Reaction

Nanomaterials, 2018
A series of carbon aerogels doped with iron, cobalt and nickel have been prepared. Metal nanoparticles very well dispersed into the carbon matrix catalyze the formation of graphitic clusters around them.
Abdalla Abdelwahab, Jesica Castelo-Quibén, José F. Vivo-Vilches, María Pérez-Cadenas, Francisco J. Maldonado-Hódar, Francisco Carrasco-Marín, Agustín F. Pérez-Cadenas   +6 more
doaj   +1 more source

Magnetic Textiles: A Review of Materials, Fabrication, Properties, and Applications

Advanced Materials Technologies, EarlyView.
Magnetic textiles (M‐textiles) are emerging as a programmable materials platform that merges magnetic matter with hierarchical textile structures. This article consolidates magnetic material classes, textile architectures, and fabrication and magnetization strategies, revealing structure–property–function relationships that govern magneto‐mechanical ...
Li Ke, Moses Kumi, Xiaoming Tao, Junhong Pu   +3 more
wiley   +1 more source

Scaling Theory and Numerical Simulations of Aerogel Sintering

, 1995
A simple scaling theory for the sintering of fractal aerogels is presented. The densification at small scales is described by an increase of the lower cut-off length $a$ accompanied by a decrease of the upper cut-off length $\xi$, in order to conserve ...
Anwar Hasmy, Daniel Bourret, Frenkel, Hasmy, Hasmy, Hasmy, Jean Phalippou, Jullien, Kingery, Kolb, Ma, Mackenzie, Mandelbrot, Meakin, Nathalie Olivi-Train, Robert Sempéré, Rémi Jullien, Scherer, Scherer, Scherer, Sempéré, Thierry Woignier   +21 more
core   +1 more source