Materials Literature
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A density functional theory (DFT) study of the 1/2$\ensuremath{\langle}111\ensuremath{\rangle}$ screw dislocation was performed in the following body-centered cubic transition metals: V, Nb, Ta, Cr, Mo, W, and Fe. The energies of the easy, hard, and split core configurations, as well as the pathways between them, were…
BACKGROUND: The increased use of synthetic packaging films has led to a high ecological problem due to their total non-biodegradability. Thus, there is a vital need to develop renewable and environmentally friendly bio-based polymeric materials. Films and coatings made from polysaccharide polymers, particularly chitos…
We measured the density of vibrational states (DOS) and the specific heat of various glassy and crystalline polymorphs of SiO2. The typical (ambient) glass shows a well-known excess of specific heat relative to the typical crystal (α-quartz). This, however, holds when comparing a lower-density glass to a higher-densit…
At the microscopic level, plastic flow of a jammed, disordered material consists of a series of particle rearrangements that cannot be reversed by subsequent deformation. An infinitesimal deformation of the same material has no rearrangements. Yet between these limits, there may be a self-organized plastic regime with…
We demonstrate through molecular dynamics simulations that the Kapitza resistance in few-layer graphene (FLG) can be controlled by applying mechanical strain. For unstrained FLG, the Kapitza resistance decreases with the increase of thickness and reaches an asymptotic value of 6 × 10(-10) m(2)K/W at a thickness about…
Small boron clusters are known to be planar, and may be used as ligands to form novel coordination complexes with transition metals. Here we report a combined photoelectron spectroscopy and ab initio study of CoB12(-) and RhB12(-). Photoelectron spectra of the two doped-B12 clusters show similar spectral patterns, sug…
Abstract Polymers have been widely used in agriculture for applications including controlled release of pesticides and other active ingredients. The ability to predict their delivery helps avoid environmental hazards. Macromolecular matrices used as carriers in controlled release of agricultural active agents, especia…
The improved performance of the semiconductor microprocessors was achieved for several decades by continuous scaling of the device dimensions while using the same materials for all device generations. At the 0.25 μm technology node, the interconnect of the integrated circuit (IC) became the bottleneck to the improveme…
Infrared absorption spectroscopy has proven to be one of the most powerful spectroscopic techniques available for the characterization of catalytic systems. Although the history of IR absorption spectroscopy in catalysis is long, the technique continues to provide key fundamental information about a variety of catalys…
In this Perspective, we present a unique approach to the design and synthesis of giant molecules based on “nanoatoms” for engineering structures across multiple length scales and controlling their macroscopic properties. Herein, “nanoatoms” refer to shape-persistent molecular nanoparticles (MNPs) with precisely define…
This paper reports a method for producing protein arrays on antifouling PEO-like coatings using a “non-contact” atmospheric pressure helium microplasma array. ToF-SIMS characterization of PEO-like coatings after short plasma treatment revealed the antifouling plasma polymer was largely modified/removed within the micr…
Two-dimensional surface relief grating (2D-SRG) on azo-dye doped polymer film (DDPF) was fabricated using the two-step of holographic writing technique. The groove structure of the 2D-SRG was dependent on the rotational angle of the two-step of writing, and the depth of the groove could be enhanced about 2~3 times by…
Diamond (Dia) films are promising heat-dissipative materials for electronic packages because they combine high thermal conductivity with high electrical resistivity. However, precise knowledge of the thermal properties of the diamond films is crucial to their potential application as passive thermal management substra…
The effects of preexisting poly(butylene succinate- co -24 mol % hexamethylene succinate) (PBHS) crystals on the crystallization behavior and crystalline morphology of poly(butylene adipate) (PBA) were studied in their fully biodegradable melt-miscible crystalline/crystalline blend. Regardless of crystallization condi…
Phonon properties of boron nitride nanotubes (BNNTs) were investigated using Raman spectroscopy at different temperatures and new sp 3 -bonded BN vibrations were identified. The Raman peak of the mode of BNNTs is found to be downshifted and broadened compared to that of hexagonal BN at the same temperature. By increas…
Abstract The molecular alumosiloxanes (O‐SiPh 2 ‐O‐SiPh 2 ‐O) 3 Al 2 and (O‐SiPh 2 ‐O‐SiPh 2 ‐O) 4 [Al(OH)] 4 react either with water in diethyl ether, or with 1,4‐butane‐diol to form the new macro‐cyclic compounds Al 6 (OH) 8 (O‐SiPh 2 ‐O‐SiPh 2 ‐O) 4 (O‐SiPh 2 ‐O‐SiPh 2 ‐OH) 2 ·6H 2 O ( 2 ) or Al 6 (OH) 8 (O‐SiPh 2…
We have grown highly crystalline beta-FeSe type iron chalcogenide nanowires (NWs) by annealing thin film that is prepared by a pulsed laser deposition method. Three kinds of NWs with compositions of Fe0.8Se, Fe0.88Se0.32Te0.68 and Fe0.88Te0.91S0.09 have been prepared and carefully characterized by a high-resolution tr…
We synthesized novel alkyl-bridged or nonbridged 6,6′-difluorinated binaphthyl derivatives and their analogues, and investigated their helical twisting properties in a fluorinated nematic liquid crystal. Since the bridged structure is rigid with a fixed dihedral angle between the two naphthalene moieties, the bridged…
Flame retardant ethylene vinyl acetate (EVA) composites were prepared based on different contents of hollow glass beads (HGBs) and aluminium hydroxide (ATH) in this paper, and the flame retardant properties were studied using limiting oxygen index, UL-94 test and cone calorimeter test respectively. The results showed…
Silicon nitride ceramics with rare earth (Re) compound (5 wt-%) and MgO (3 wt-%) additives were fabricated by spark plasma sintering and following heat treatment. The Re compounds included two groups: ReF3 ((Re = La,Nd,Gd) and Re2O3 (Re = La,Nd,Gd). Specimens show the same tendency in the sintering shrinkage rate, rel…