Materials Literature
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Relating cellulose structure to its water uptake is a classical problem with many investigations done through measurements of cellulose "crystallinity". However, there is presently a growing consensus that crystallinity measurements are appreciably uncertain, leading to ambiguous interpretations of underlying cellulos…
A novel asymmetric electrochemical capacitor (AEC) with high energy and power densities has been developed using a graphene oxide/cobalt(II)tetrapyrazinoporphyrazine composite (GO/CoTPyzPz) as the positive electrode and graphene oxide/carbon black (GO/CB) as the negative electrode in a neutral aqueous Na2SO4 electroly…
We study the motion of C₆₀ fullerene molecules and short-length carbon nanotubes on graphene nanoribbons. We reveal that the character of the motion of C₆₀ depends on temperature: for T < 150 K the main type of motion is sliding along the surface, but for higher temperatures the sliding is replaced by rocking and roll…
This study reports the in vitro and in vivo biological activities of recombinant human bone morphogenetic protein 2 (rhBMP-2) released from the core-shell structure of a nanofibrous barrier membrane as a sustained delivery model for bone regeneration. RhBMP-2 incorporating poly(ethylene glycol) was used as the core, a…
Molecular dynamics simulations of phosphate-based glasses P(2)O(5)-CaO-Na(2)O have been carried out, using an interatomic force field that has been parameterized to reproduce the structural and mechanical properties of crystalline phosphorus pentoxide, o(')(P(2)O(5))(∞) orthorhombic phase. Polarization effects have be…
The interaction between metallic iron and kaolinite was studied in conditions relevant to those that may be encountered in a high-level radioactive waste disposal facility in geological formation. Experiments were carried out under anoxic atmosphere at 90 °C and in chloride solutions to simulate conditions close to di…
Poly(ethylene glycol) (PEG) with acid-sensitive moieties gained attention particularly for various biomedical applications, such as the covalent attachment of PEG (PEGylation) to protein therapeutics, the synthesis of stealth liposomes, and polymeric carriers for low-molecular-weight drugs. Cleavable PEGs are favored…
The old switcheroo! The ring-opening polymerization activity towards meso-lactide significantly differs when cerium complexes with two bis(phenolate) ligands (OSSO type) change their oxidation state from +4 to +3. This switch can be performed in situ by chemical reduction or oxidation of the catalyst. The redox switch…
This contribution presents a study of the atomic and electronic structure of the $(\sqrt{5}\ifmmode\times\else\texttimes\fi{}\sqrt{5})R26.6\ifmmode^\circ\else\textdegree\fi{}$ surface reconstruction on ${\mathrm{BaTiO}}_{3}$ (001) formed by annealing in ultrahigh vacuum at 1300 K. Through density functional theory cal…
The anionic charge of atomically precise Au25(SC2H4Ph)18(-) nanoclusters (abbreviated as Au25(-)) is thought to facilitate the adsorption and activation of molecular species. We used optical spectroscopy, nonaqueous electrochemistry, and density functional theory to study the interaction between Au25(-) and O2. Surpri…
To improve the pharmacokinetics and stability of recombinant human erythropoietin (rhEPO), rhEPO was successfully formulated into poly(ethylene glycol)-poly(d,l-lactide) (PEG-PLA) di-block copolymeric micelles at diameters ranging from 60 to 200 nm with narrow polydispersity indices (PDIs; PDI , 0.3) and trace amount…
Heterophase boundaries can offer fast transport paths in solid electrolyte materials. In recent studies an enhancement of the ionic conductivity was indeed observed in micro-/nanoscaled Y(2)O(3)-stabilised ZrO(2) (YSZ) composites and hetero multilayers of thin films. As space charge regions can be neglected due to hig…
RNA interference (RNAi) is a promising approach for cancer treatment. Site specific and controlled delivery of RNAi could be beneficial to the patient, while at the same time reducing undesirable off-target side effects. We utilized electrospinning to generate a biodegradable scaffold capable of incorporating and deli…
To develop fluorescent organic nanoparticles with tailored properties for imaging and sensing, full control over the size, fluorescence, stability, dynamics, and supramolecular organization of these particles is crucial. We have designed, synthesized, and fully characterized 12 nonionic fluorene co-oligomers that form…
The hydrothermal transformation of single aragonite crystals into polycrystalline calcite has been studied under hydrothermal conditions. The transformation involves a fluid-mediated replacement reaction, associated with fracturing of the initial aragonite crystal and growth of calcite throughout various parts of the…
The possibility of using hydrogen as a reliable energy carrier for both stationary and mobile applications has gained renewed interest in recent years due to improvements in high temperature fuel cells and a reduction in hydrogen production costs. However, a number of challenges remain and new media are needed that ar…
Abstract Silicon based thermoelectrics are promising candidates for high temperature energy scavenging applications. We present the properties of thermoelectrics made from highly boron doped silicon nanoparticles. The particles were produced by a continuous gas phase process in a scaled‐up synthesis plant enabling pro…
Improved performance of a photosynthetic antenna–reaction center mimicking supramolecular solar cell is demonstrated. Toward this, porphyrin–phthalocyanine conjugates connected by amide linkers, as wide-band capturing solar energy harvesting materials, have been newly synthesized and characterized. Efficient singlet–s…
Polymeric microsieves with uniform and tunable pores were fabricated with the breath-figure method and sequent vulcanization procedure using commercially available block copolymer polystyrene- b -polyisoprene- b -polystyrene. Uniform pore size and small film thickness endow the microsieves with high size selectivity a…
By using femtosecond laser pulses to ablate microsized targets that are dispersed in liquid media, nanocrystalline Cr(2+)-doped ZnSe nanowires have been successfully fabricated for the first time. The phase and stoichiometries of the original materials are preserved while the sizes are reduced down to 30-120 nm for th…