Materials Literature
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Molecular dynamics (MD) simulations are used to directly observe nucleation of median cracks in oxide glasses under indentation. Indenters with sharp angles can nucleate median cracks in samples with no pre-existing flaws, while indenters with larger indenter angles cannot. Increasing the tip radius increases the crit…
This study focuses on deterioration modelling and performance assessment of metallic bridges affected by atmospheric corrosion, considering also the contribution of typical protective systems in the form of multi-layer coatings. The mechanisms leading to coating degradation are reviewed and the main coating types used…
Most solders used in electronic systems have low-melting temperature and hence experience significant amount of creep deformation throughout their life-cycle because typical operational and test conditions represent high homologous temperature. Phenomenological and mechanistic models used in the literature for predict…
The inducible lysine decarboxylase LdcI is an important enterobacterial acid stress response enzyme whereas LdcC is its close paralogue thought to play mainly a metabolic role. A unique macromolecular cage formed by two decamers of the Escherichia coli LdcI and five hexamers of the AAA+ ATPase RavA was shown to counte…
Resonant x-ray scattering is used to definitively show that a pure spin density wave state is the ground state in ultrathin LaNiO${}_{3}$ layers sandwiched between LAAlO${}_{3}$ layers. This result is also shown to be in agreement with first-principles calculations.
We report on the influence of Fe 2 O 3 on the crystallization kinetics of nepheline (Na 2 O·Al 2 O 3 ·2SiO 2 )‐based sodium aluminosilicate glasses. A series of glasses with varying Al 2 O 3 /Fe 2 O 3 content were synthesized in the system 25Na 2 O–(25– x ) Al 2 O 3 – x Fe 2 O 3 –50SiO 2 ( x varies between 0 and 5 mol…
Nanoparticles functionalized with long polymer chains at low graft density are interesting systems to study structure-dynamic relationships in polymer nanocomposites since they are shown to aggregate into strings in both solution and melts and also into spheres and branched aggregates in the presence of free polymer c…
This study describes a new and simple approach to dope two-dimensional transition metal dichalcogenides (TMDCs) using the superatom Co6Se8(PEt3)6 as the electron dopant. Semiconducting TMDCs are wired into field-effect transistor devices and then immersed into a solution of these superatoms. The degree of doping is de…
BACKGROUND: High-molecular-weight (MW) polymers (>50,000 Da) can be conjugated to chemotherapy drugs in order to improve their tumor accumulation, while low MW polymers ≤10,000 Da are often overlooked due to faster plasma clearance. Small polymers, however, may facilitate deeper tumor penetration. MATERIALS & METHODS:…
An azo (N═N) based covalent organic framework (COF-TpAzo) has been synthesized via a Schiff base condensation reaction. The Braunauer–Emmett–Teller (BET) specific surface area up to 1552 m 2 ·g –1 was obtained for the framework with a pore volume of 0.97 cm 3 ·g –1 . The COF-TpAzo exhibits a high selectivity in CO 2 /…
We previously reported that the dispersed rubber microparticles in ethylene-propylene-diene monomer (EPDM)/polypropylene (PP) thermoplastic vulcanizates (TPVs) are actually agglomerates of rubber nanoparticles. In this study, based on this new understanding of the microstructure of TPV, we further revealed the microst…
Access to a new family of thioether-linked PSRT ligands, 4-substituted-3,5-bis{[(2-pyridylmethyl)sulfanyl]methyl}-4H-1,2,4-triazoles (analogues of the previously studied amino-linked PMRT ligands), has been established. Four such ligands have been prepared, PSPhT, PS(i)BuT, PS(t-Bu)PhT, and PS(Me)PhT, with R = Ph, (i)…
Epitaxial magnetic tunnel junctions (MTJs) with a Co 2 FeAl/CoFe (0.5 nm)/MgAl 2 O 4 /Co 2 FeAl(001) structure were fabricated by magnetron sputtering. High-temperature in situ annealing led to a high degree of B2-order in the Co 2 FeAl layers and cation order of the MgAl 2 O 4 barrier. Large tunnel magnetoresistance…
Many bacteria are capable of accumulating intracellular granules of polyhydroxyalkanoates (PHA). In this work, we developed confocal microscopy analysis of bacterial cells to study changes in the diameters of cells as well as PHA granules during growth and PHA accumulation in the bacterium Cupriavidus necator H16 (for…
Efficient visible-to-UV photon upconversion via triplet-triplet annihilation (TTA) is accomplished in polyurethane (PU) films by developing new, powerful photosensitizers fully functional in the solid-state matrix. These rationally designed triplet sensitizers feature a bichromophoric scaffold comprising a tris-cyclom…
Multiferroics present a dynamic crossover between magnetic and electronic order parameters. Using both the conventional pyroelectric current (PC) and the bias electric field (BE) methods, the authors investigate the electric polarization of multiferroic $M$Mn${}_{7}$O${}_{12}$ ($M$= Ca, Sr, Cd, Pb). While the pyrocurr…
Antimicrobial coatings are in high demand in many fields including the biomaterials and healthcare sectors. Within recent progress in nanoscience and engineering at the nanoscale, preparation of nanocomposite films containing metal nanoparticles (such as silver nanoparticles, copper nanoparticles, zinc oxide nanoparti…
Bone tissue engineering based on scaffolds is quite a complex process as a whole gamut of criteria needs to be satisfied to promote cellular attachment, proliferation and differentiation: biocompatibility, right surface properties, adequate mechanical performance, controlled bioresorbability, osteoconductivity, angiog…
A paradigm in nature is to architect composites with excellent material properties compared to its constituents, which themselves often have contrasting mechanical behavior. Most engineering materials sacrifice strength for toughness, whereas natural materials do not face this tradeoff. However, biology's designs, ada…
When silver nanoparticles (AgNPs) are used commercially at a large scale, they infiltrate the environment at a rapid pace. However, the impact of large quantities of AgNPs on aquatic ecosystems is still largely unknown. In aquatic ecosystems, the phytoplanktons have a vital ecological function and, therefore, the pote…