The physico-chemical properties of colloidal nanoparticles (NPs) are influenced by their local environment, as, in turn, the environment influences NPs. In other words, around NPs has a profound impact on NPs, and it is different from bulk due to interaction with NP surface. So far, this important effect not been addressed comprehensive way literature. vicinity can be sensitively ions ligands, effects already occurring at extremely low concentrations. Hückel regime more sensitive...

Size control of laser-fabricated surfactant-free gold nanoparticles is a challenging endeavor. In this work, we show that size can be achieved by adding ions with low salinity during synthesis. addition, approach offers the opportunity to fundamentally study ion interactions bare nanoparticle surfaces and help elucidate formation mechanism. The studies were carried out in flow-through reactor presence NaCl, NaBr sodium phosphate buffer at minimal ionic strengths. A significant quenching...

Specific ion effects ranking in the Hofmeister sequence are ubiquitous biochemical, industrial, and atmospheric processes. In this experimental study specific inexplicable by classical DLVO theory have been investigated at curved water-metal interfaces of gold nanoparticles synthesized a laser ablation process liquid absence any organic stabilizers. Notably, ion-specific differences colloidal stability occurred Hückel regime extraordinarily low salinities below 50 μM, indications direct...

Sustainable societies require the development of engineered hybrid materials. Bio-inspired mineralization wood cell wall architecture with calcium carbonate offers a green alternative to conventional fire-retardant systems.

A "grafting-from" polymerization approach within and at the complex heterogeneous macromolecular assembly of wood cell walls is shown. The allows for implementation novel functionalities in renewable functional wood-based materials. native structure retained used as a hierarchical multiscale framework modular two-step process. versatility potential shown by either hydrophobic or hydrophilic pH-responsive monomers structure. Characterization modified reveals presence polymer wall, new...

Anisotropic and hierarchical structures are bound in nature highly desired engineered materials, due to their outstanding functions performance. Mimicking such natural features with synthetic materials methods has been a active area of research the last decades. Unlike these methods, we use native biomaterial wood, its intrinsic anisotropy hierarchy as directional scaffold for incorporation magnetic nanoparticles inside wood material. Nanocrystalline iron oxide particles were synthesized...

Abstract Wood can be considered as a highly porous, three-dimensional organic scaffold. It mineralized to create hierarchically structured organic-inorganic hybrid materials with novel properties. In the present paper, precipitation of CaCO 3 mineral in Norway spruce and European beech wood has been studied by alternating impregnation aqueous alcoholic electrolyte solutions. Microstructural imaging SEM confocal Raman microscopy shows distribution calcite vaterite two polymorphs, which are...

Abstract Wood, a natural and abundant source of organic polymers, has been used as scaffold to develop novel wood-polymer hybrid materials. Through two-step surface-initiated Atom Transfer Radical Polymerization (ATRP), the porous wood structure can be effectively modified with polymer chains various nature. In present study, polystyrene poly(N-isopropylacrylamide) were used. As shown characterization techniques including confocal Raman microscopy, FTIR SEM/EDX, native ultrastructure...

Exosomes have gained recognition in cancer diagnostics and therapeutics. However, most exosome isolation methods are time-consuming, costly, require bulky equipment, rendering them unsuitable for point-of-care (POC) settings. Microfluidics can be the key to solving these challenges. Here, we present a double filtration microfluidic device that rapidly isolate exosomes via size-exclusion principles POC The efficiently from 50–100 µL of plasma within 50 min. was compared against an already...

Studying the multiscale mechanics of bio-based composites offers unique perspectives on underlying structure–property relations. Cellular materials, such as wood, are highly organized, hierarchical assemblies load-bearing structural elements that respond to mechanical stimuli at microscopic, mesoscopic and macroscopic scale. In this study, we modified oak wood with nanocrystalline ferrihydrite, a widespread ferric oxyhydroxide mineral, characterized resulting properties composite various...

Swimming kinematics and macroscale mechanical testing have shown that the vertebral column of sharks acts as a biological spring, storing releasing energy during locomotion. Using synchrotron X-ray nanotomography deep-learning image segmentation, we studied ultrastructure deformation mechanism mineralized shark vertebrae from Carcharhinus limbatus (Blacktip shark). The centrum con regions: corpus calcareum, hypermineralized double cone, intermediale, blocks cartilage interspersed by...

Harmful levels of environmental contaminants, such as arsenic (As), persist in the environment, threatening drinking water supplies parts world. Nanocrystalline iron hydroxide wood filters can remove As from running and standing water.

Biomineralization involves the controlled formation of inorganic matter within hierarchical biological scaffolds. Mimicking crystallization biominerals in such confinement is an important goal field crystal engineering. Natural porous materials offer interesting platform for studying mineral morphogenesis and texturing through template-directed mineralization. In this paper, we precipitate barium sulfate from aqueous salt solutions constrained micro- nanoenvironment pristine wood cells cell...

The accumulation and amyloid formation of amyloid-β (Aβ) peptides is closely associated with the pathology Alzheimer's disease. physiological environment wherein Aβ aggregation happens crowded a large variety metal ions including Zn2+. In this study, we investigated role Zn2+ in regulating kinetics Aβ40 peptide. Our results show that can shift typical single sigmoidal to biphasic process. aids initiating rapid self-assembly monomers form oligomeric intermediates, which further grow into...

Abstract Nitrogen-fixing cyanobacteria bind atmospheric nitrogen and carbon dioxide using sunlight. This experimental study focused on a laboratory-based model system, Anabaena sp., in nitrogen-depleted culture. When combined is scarce, the filamentous procaryotes reconcile photosynthesis fixation by cellular differentiation into heterocysts. To better understand influence of micronutrients function, 2D 3D synchrotron X-ray fluorescence mappings were acquired from whole biological cells...