Materials Literature
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We report measurements of the thermal conductivity of aqueous suspensions of aluminum oxide nanoparticles with nominal diameters of 20nm, 30nm, and 45nm and at volume concentrations up to 10%. Potential complications in the pulsed transient hot-wire technique for characterizing nanofluids are examined, which motivate…
Abstract Monodomains of smectic C liquid crystalline elastomers were prepared by controlled stretching of a polydomain thin film. Specimens were prepared from this film for stress–strain study. A Poisson's ratio of zero was found at small strains for uniaxial stretching perpendicular to the director. For uniaxial stra…
A special test apparatus for microchannel condensation was designed and fabricated based on silicon microfabrication processes, in which the condensing die was sandwiched by two cooling dies on both sides. Micro thermal sensors were integrated on both the surfaces of the condensing die to measure the wall temperature.…
Although synthetic investigations of inorganic nanomaterials had been carried out extensively over the past decade, the rapid synthesis of crystalline microporous nanostructures with a high surface−volume ratio is still a significant challenge. In this work, by combining the excellent properties of both microwave heat…
The oesophagus acellular matrix (EAM) tissue-scaffold has the potential to serve as the foundation for a tissue-engineered oesophagus for repair of ablative defects. Similar to all collagen-based biomaterials, the EAM is subject to enzymatic degradation in vivo. The introduction of exogenous crosslinks to collagen mol…
The photo-oxidative degradation of a highly cross-linked epoxide/diamine network has been investigated by FTIR spectroscopy, dynamic-mechanical thermal analysis (DMTA) and compressive mechanical tests. The FTIR measurements allowed us to monitor the degradation process and to obtain reliable kinetic data. Two dimensio…
Apparent electrostatics-defying clustering of arginines attributed as screening effect of solvent is in this study examined as a possible thermodynamic driving force in protein-protein interaction. A dataset of 266 protein dimers is found to have approximately 22% arginines mutually paired and approximately 17% pairs…
Mass transport of chemical mixtures in nanoporous materials is important in applications such as membrane separations, but measuring diffusion of mixtures experimentally is challenging. Methods that can predict multicomponent diffusion coefficients from single-component data can be extremely useful if these methods ar…
EMACs (extended metal-atom chains) offer a unique platform for the exploration of metal-metal interactions. There has been significant advances on the synthesis of EMACs, such as lengthening the chains up to 11 metal atoms thus far, integrating naphthyridine moieties for tuning the charge carried at metal centers, and…
Abstract Three novel polyhedral oligosilsesquioxane (POSS) nanofillers functionalized with proton‐conducting sulfonic acid groups, mixed sulfonic acid and alkyl groups, and phosphonic acid groups were synthesized, characterized by IR, 1H and 13C NMR, and MALDI‐TOF MS, and formulated into sulfonated polyphenylsulfone (…
Abstract The focus of this article is the numerical study of particle deposition profiles on a solid substrate during the evaporation of a sessile drop of a colloidal particle suspension. The evaporation flux along the drop interface, the induced fluid dynamics inside the drop, and the particle deposition profile on t…
Fluorocarbon-modified silica membranes were deposited on gamma-Al2O3/alpha-Al2O3 supports by the sol-gel technique for hydrogen separation. The hydrophobic property, pore structure, gas transport and separation performance, and hydrothermal stability of the modified membranes were investigated. It is observed that the…
Mesenchymal stem cells (MSCs) are considered to be a source of stem cells in tissue regeneration and therapeutics, due to their ability to undergo proliferation and differentiation. Complications associated with bone marrow-derived MSCs has prompted researchers to explore alternative sources of MSCs. The human umbilic…
The acetylene-sorption properties of six porous coordination polymers (PCPs), [M(2)(L)(2)(dabco)](n) (dabco=1,4-diazabicyclo[2.2.2]octane, M=Cu(2+) (1), Zn(2+) (2), L=1,4-benzenedicarboxylate (bdc; 1 a, 2 a), 1,4-naphthalenedicarboxylate (ndc; 1 b, 2 b), 9,10-anthracenedicarboxylate (adc; 1 c, 2 c)), were investigated…
BACKGROUND: Early barrier membrane degradation may result in decreased bone formation in guided bone regeneration (GBR) procedures. The aim of this study was to evaluate the bio-degradation of cross-linked (CLM) and non-cross-linked (NCLM) collagen membranes experimentally exposed to the oral environment of study anim…
Be my guest: Two molecules of a cavitand tetraboronic acid and four molecules of a bis(catechol) linker quantitatively assemble into a capsule (see picture for two views), with highly selective guest-recognition, by dynamic boronic ester formation. The on/off control of capsule formation with guest encapsulation is ac…
A new approach based on density functional theory and the Anderson impurity model is developed to calculate charging energies and quasiparticle energy gaps of molecular systems weakly coupled to an environment. The approach is applied to C60 adsorbed on Au(111) and Ag(100) surfaces, resulting in electronic structures…
We show how suitable combinations of cascaded diffractive optical elements (DOEs) can form a combined "moiré DOE" of adjustable refractive power and high diffraction efficiency. The optical power can be adjusted continuously by a mutual rotation of one DOE with respect to the other. Fresnel lenses and axicons of varia…
Heteronuclear, supramolecular ring and cage complexes have been constructed from a pyridyl catechol ligand, TiO(acac)2, and PdCl2(CH3CN)2. These two complexes are quantitatively interconvertible, in which Ti4+-centered coordination changes take place between a well-known Ti(catecholato)3 and a newly established TiH(ca…
The keratinocyte growth and differentiation switch, tightly regulated by several mechanisms, is generally associated with decreased proliferation, cell cycle arrest in G0/G1 phase and expression of epidermal differentiation markers, such as keratin 1 (K1), keratin 10 (K10) and involucrin. In vitro, the spontaneously i…