Materials Literature
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Abstract Over the past 16 years, hyperbranched polyesters (HBPEs) based on dimethylolpropionic acid have received much attention due to their unique structural characters, their excellent physical and chemical properties as well as their potential applications in coatings, additives, drug delivery, composites, membran…
The performance of 2,5-dialkoxy-1,4-benzoquinone derivatives as positive-electrode active materials for use in rechargeable lithium batteries was investigated. These derivatives showed stepwise two-electron redox behaviors in cyclic voltammetry, and also exhibited high initial discharge capacities of more than 200 mAh…
CPE behavior may be attributed to the distribution of physical properties in films, in the direction normal to the electrode surface. Numerical simulations were used to show that, under assumption that the dielectric constant is independent of position, a normal power-law distribution of local resistivity is consisten…
Motivated by recent proposals on strain engineering of graphene electronic circuits we calculate conductivity, shot noise and the density of states in periodically deformed graphene. We provide the solution to the Dirac-Kronig-Penney model, which describes the phase-coherent transport in clean monolayer samples with a…
Novel molybdate materials with varying Mo valence were synthesized as possible negative-electrode materials for solid oxide cells. The phase, stability, microstructure and electrical conductivity were characterized. The electrochemical activity for H2O and CO2 reduction and H2 and CO oxidation was studied using simpli…
Responsive polymeric brushes of poly(methacrylic acid) (PMAA) were grafted from silicon surfaces using controlled surface-initiated atom-transfer radical polymerization (SI-ATRP). The growth kinetics of PMAA was investigated with respect to the composition of the ATRP medium by grafting the polymer in mixtures of wate…
The thermochemistry of the formation of Lewis base adducts of BH(3) in tetrahydrofuran (THF) solution and the gas phase and the kinetics of substitution on ammonia borane by triethylamine are reported. The dative bond energy of Lewis adducts were predicted using density functional theory at the B3LYP/DZVP2 and B3LYP/6…
Magnetic nanoparticles are of great interest both for fundamental research and emerging applications. In the biomedical field, magnetite (Fe(3)O(4)) has shown promise as a hyperthermia-based tumor therapeutic. However, preparing suitable solubilized magnetite nanoparticles is challenging, primarily due to aggregation…
Abstract Poly( L ‐lactide) (PLLA) and poly( D ‐lactide) (PDLA) having anthracene and maleimide terminals were prepared and mixed together to induce a terminal Diels–Alder reaction providing PLLA–PDLA diblock copolymers. The resultant Diels–Alder adducts showed a sole melting peak of stereocomplex crystals around 220 °…
We present experimental results for the plasmonic laser ablation of silicon with nanoscale features as small as 22 x 66 nm using single near-infrared, femtosecond laser pulses incident on gold nanorods. Near the ablation threshold, these features are photo-imprints of gold nanorod particles positioned on the surface o…
Abstract The execution of individual KMC events can become a major computational bottleneck in the simulation of sequences along chains using KMC because of complex data storage schemes required to record the sequence of each chain. The execution of a KMC event can be very time‐consuming because searching, moving, and…
Using confocal micro-Raman and photoluminescence spectroscopy, we studied bending effects on optical properties of individual ZnO nanowires. Raman spectroscopy shows that local tensile strain can be introduced by bending the nanowire. The strain is expected to reduce the band gap on the bent part and modify the local…
TiO 2 nanoparticle photocatalysts modified with uniform gold nanoparticles are prepared by anchoring bifunctional glutathione-coated monolayer-protected gold clusters (MPCs) onto TiO 2 . In this method, the MPC loading on TiO 2 can be precisely controlled in the range of 1−5 wt % without incurring size change upon anc…
Increasing the citrate concentration during the seeded growth synthesis of gold nanoparticles yields materials with decreased aspect ratios and increased defect densities. The stability of these nanoparticles is attributed to variations in their overall Gibb's free energy.
Electrical transport of a highly doped disordered conducting polymer, viz. poly-3,4-ethylenedioxythiophene stabilized with poly-4-styrenesulphonic acid, is investigated as a function of bias and temperature. The transport shows universal power-law scaling with both bias and temperature. All measurements constitute a s…
The deposition of Ge 25 Sb 10 S 65 and Ge 25 Sb 10 Se 65 amorphous chalcogenide thin films was performed by radio‐frequency magnetron sputtering and pulsed laser deposition technique. The deposited layers were characterized by studying their morphology, topography, chemical composition, structure, and optical function…
This paper investigated wicking properties of cotton-acrylic rotor yarns and knitted fabrics. The effect of yarn wicking on wicking of fabric in both wale and course directions was also discussed. One way ANOVA results of the experimental study suggested that wicking abilities of yarns and fabrics increased with the i…
Triangular cationic belts [Au3{PPh2(C6H4)nPPh2}3]3+ enclose bimetallic clusters [AuwAgx(C2Ph)yXz] in molecular aggregates obtained by halide (X)-directed assembly of multicomponent systems. The largest aggregate consists of a central metal alkynyl halide cluster [Au18Ag30(C2Ph)36Cl9]3+ inside a [Au3{PPh2(C6H4)5PPh2}3]…
Abstract Expandable graphite oxide (EGO) was functionalized with different amine groups after sequential steps as thermal expansion, oxidation, acylation, and amidation. Three types of amino‐functionalized graphenes (a‐Gphs) were prepared by exfoliating amino functionalized EGOs(a‐EGO) through controlled ultrasonicati…
Colloidal microcapsules (MCs) are highly modular, inherently multiscale constructs of capsules stabilized by nano-/microparticle shells, with applications in many areas of materials and biological sciences, such as drug delivery, encapsulation, and microreactors. Until recently, fabrication of colloidal MCs focused on…