Materials Literature
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Hierarchical three-dimensional (3D) vanadium oxide microstructures, including urchin-like microflowers, nanohorn-structured microspheres, nanosheet-assembled microflowers, and nanosheets bundles, are successfully synthesized by a versatile template-free solvothermal method. It is found that the concentration of the pr…
Separate gold and platinum nanoparticles simultaneously immobilized on a glass surface were used to study the kinetics of a catalytic reaction directly. Owing to the proximity of the platinum and gold nanoparticles, the analyte molecules can interact with the platinum nanoparticles whilst they reside in the local opti…
We form coronas of serum proteins on gold nanorods (NRs) coated with cetyltrimethylammonium bromide (CTAB). These coronas can be exploited for their ability to hold small molecular therapeutics at a capacity much higher (~5-10×) than what covalent conjugation strategies can achieve. Coronas are loaded with DNA oligonu…
Fluorescent nanosized carbon dots (Cdots) are an emerging bioimaging agent with excellent chemical inertness and marginal cytotoxicity in comparison to widely used semiconductor quantum dots. In this work, we report the application of Cdots for real time bioimaging of target specific delivery of hyaluronic acid (HA) d…
Group 14 elements (C, Si, and Ge) exist as various stable and metastable allotropes, some of which have been widely applied in industry. The discovery of new allotropes of these elements has long attracted considerable attention; however, the search is far from complete. Here we computationally discovered a tetragonal…
Active and selective: Ceria shows a high activity and selectivity in the gas-phase hydrogenation of alkynes to olefins. This unprecedented behavior has direct impact on the purification of olefin streams and, more importantly, it opens new perspectives for exploring this fascinating oxide as a catalyst for the selecti…
We use a first-principles rational-design approach to demonstrate the potential of semiconducting half-Heusler compounds as a previously unrecognized class of piezoelectric materials. We perform a high-throughput scan of a large number of compounds, testing for insulating character and calculating structural, dielectr…
Small is beautiful: A ring-contracted sister of porphyrin, norcorrole, has been synthesized efficiently as a stable molecule by a nickel-templated strategy. The norcorrole complex is stable but exhibits a distinct antiaromatic character according to the Hückel rule. Oxidation of the norcorrole complex provides an arom…
Frequency doubling: A strategy for incorporating dipolar organic chromophores into the one-dimensional channels of an anionic metal-organic framework (MOF) has been developed to generate highly active nonlinear optical materials (see picture). The resulting MOF material shows a second-harmonic generation intensity of…
Hybrid biomaterials are systems created from components of at least two distinct classes of molecules, for example, synthetic macromolecules and proteins or peptide domains. The synergistic combination of two types of structures may produce new materials that possess unprecedented levels of structural organization and…
The influence of the ratio between poor and good solvent on the stability and dynamics of supramolecular polymers is studied via a combination of experiments and simulations. Step-wise addition of good solvent to supramolecular polymers assembled via a cooperative (nucleated) growth mechanism results in complete disas…
Nanocrystalline cellulose (NCC) reinforced chitosan-based biodegradable films were prepared by solution casting. The NCC content in the films was varied from 1 to 10% (dry wt. basis). It was found that the tensile strength (TS) of the nanocomposite films with 5% (w/w) NCC content was optimum with an improvement of 26%…
A preocupao ambiental sobre a toxicidade do Pb combinada com normas rgidas, esto gradualmente proibindo a aplicao de Pb em ligas de soldas. As ligas alternativas Sn-Ag e Sn-Bi podem estar entre as mais promissoras candidatas substituio das ligas de solda sem chumbo em funo de apresentarem propriedades compatveis com a…
Speleothem: FMD, Sample color: Yellow orange
Tolloid proteinases constitute a group of extracellular metalloproteinases which includes four members in mammals (BMP-1, mTLD, mTLL-1, mTLL-2). These proteinases play major roles in development, tissue repair and related pathological conditions such as fibrosis. In 2006, the first endogenous inhibitor of Tolloid prot…
Speleothem: FMD, Sample color: Yellow orange
The aim of this work was to study the behavior of FaDu cells in contact with 2D substrates (pellicles) of BNC and to develop a 3D method to create a model of hypopharyngeal squamous carcinoma by means of BNC/alginate porous sponges. In this perspective, cells were seeded on uncoated scaffolds either as cell suspension…
La motivation de ce travail est d'étudié l'effet du rayonnement ultraviolet (UV) et bombardement électronique (EB) sur la structure et les propriétés des composites polymères/CL préparés par polymérisation radicalaire. Les intérêts de recherche dans ce domaine ont porté principalement sur la solution de polymérisation…
Speleothem: FMD, Sample color: Yellow orange
Speleothem: FMD, Sample color: Yellow orange