Materials Literature
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The validity of the commonly used quantum corrections for mapping a classically predicted thermal conductivity onto a corresponding quantum value are assessed by self-consistently predicting the classical and quantum thermal conductivities of a crystalline silicon system via lattice-dynamics calculations. Applying the…
A near-field scanning optical microscope is used to locally induce photocurrent in a graphene transistor with high spatial resolution. By analyzing the spatially resolved photoresponse, we find that in the $n$-type conduction regime a $p\text{\ensuremath{-}}n\text{\ensuremath{-}}p$ structure forms along the graphene d…
The geometries, formation energies, and electronic and magnetic properties of N-doping defects, including single atom substitution and pyridine- and pyrrole-like substructures in zigzag graphene nanoribbons (ZGNRs), were investigated by means of spin-unrestricted density functional theory computations. The edge carbon…
Chemotherapy can destroy tumors and arrest cancer progress. Unfortunately, severe side effects (treatment is usually a series of injections of highly toxic drugs) often restrict the frequency and size of dosages, much to the detriment of tumor inhibition. Most chemotherapeutic drugs have pharmacokinetic profiles with…
In order to reduce the hairiness of ring spun yarns and to develop novel multilayered spun yarns, we investigated the properties of triplet spun yarns made from the same size of three rovings with different fiber fineness using an experimental ring spinning frame. The results were: (1) different fiber fineness triplet…
Abstract Polypropylene/nano‐calcium carbonate (PP/nano‐CaCO 3 ) composites were prepared by using an intermeshing, co‐rotating twin‐screw extruder. Two different screw configurations, denoted by screws A and B, respectively, were employed. The former provided high dispersive mixing and the later provided high dispersi…
This study conducts a three-dimensional electro-thermal time-domain simulation for numerical analysis of cylindrical-shaped phase change memories (PCMs). The influence of chalcogenide material, germanium antimony telluride (GeSbTe or GST), structure on PCM operation is explored. GST with vertical structure exhibits pr…
Optimizing vacuum grippers of robots for glass sheets handling and developing robots for glass cleaning, it is necessary to solve a number of problems calling for a similar approach to a solution.
Nanocomposites composed of palladium (Pd) nanoparticles, (Pd) n, and a symmetric diblock copolymer (dibcp) poly(styrene)- block -poly(isoprene) (PS- b -PI) have been prepared via reducing palladium acetylacetonate, Pd(acac) 2, incorporated in the solution cast PS- b -PI films by a thermal treatment. In our earlier wor…
Abstract The temperature dependence of the mechanical properties of a series of ethylene–tetrafluoroethylene copolymers was interpreted reasonably on the basis of experimental information about the crystalline phase transition and the amorphous‐glass transition behaviors. The crystalline phase‐transition temperature,…
Abstract Poly( p ‐phenylene vinylene) (PPV) nanofibers with disordered, helical, and yarn morphologies were controllably prepared by the electrospinning of a cationic polyelectrolyte precursor in an ethanol solution followed by thermal conversion. Through the tuning of the precursor solution properties and processing…
We propose to use nano structures directly to fully utilize the nice mechanical and thermal properties for nano machining. In this project, CNTs were directly used as cutting grains. For the CNT grains, we use epoxy as one of the bonding materials of our choice. A series of CNT grinding wheels were fabricated to demon…
A scalable electrochemical process for addressing the thermomechanical compliance and contact resistance at metal/thermoelectric (M/TE) interfaces by integrating TE films with carbon nanotube (CNT) arrays is presented. Thermomechanical compliance and thermal contact characteristics of TE/CNT/M and TE/M contacts are co…
A change of image: Single molecules of horseradish peroxidase are investigated by scanning electrochemical potential microscopy (SECPM) and electrochemical STM (EC-STM). SECPM delivers images (left) of single enzymes that are of greater detail than those obtained by EC-STM (right) and even shows an enzyme molecule not…
We have synthesized a series of poly[4-(9,9-dihexylfluoren-2-yl)styrene]- block -poly(2-vinylpyridine) (P(St-F1)- b -P2VP) and poly[4-di(9,9-dihexylfluoren-2-yl)styrene]- block -poly(2-vinylpyridine) (P(St-F1 2 )- b -P2VP) comblike block copolymers and investigated their self-assembly behavior. The block composition,…
Hybrid density functional theory was employed in investigating the structural and electronic properties of 14 chiral and 3 armchair SiC nanotubes (SiCNTs). The role of the tube diameter, as well as that of the chiral angle theta, was studied in detail by considering nanotubes of diameters varying from 2 to 9 A and chi…
The crystal structure of jinshajiangite, ideally BaNaTi 2 Fe 4 2+ (Si 2 O 7 ) 2 O 2 (OH) 2 F, a 10.6785(8), b 13.786(1), c 20.700(2) A, β 94.937(1)°, V 3035.93(6) A 3 , sp. gr. C 2/ m , Z = 8, D calc. 3.767 g/cm 3 , from Norra Karr, Tonkoping province, Sweden, has been refined to R 1 5.69 % on the basis of 3193 unique…
Spin crossover complex has an ideal molecular bistability in which a single molecule or an assembly of molecules can be used as active elements in novel thermal switches , optical switches or information memory devices. The important progress over the past three years on Fe (Ⅱ) spin crossover molecule2based materials…
Abstract A series of polypropylene/maleic anhydride grafted polypropylene octane elastomer (MAH‐ g ‐POE)/clay (PPMC) nanocomposites were prepared with a novel compatilizer MAH‐ g ‐POE and different contents of octadecyl amine modified montmorillonite, and the effects of clay contents on the dynamic mechanical and rheo…
The crystal structures of three different solid-solution members between the new mineral oxyvanite (V3O5) - and berde- sinskiite (V2TiO5) from a quartzite rock in the Pereval marble quarry of the Sludyanka complex, south of Lake Baikal (Russia), have been refined in space group C2/c (a � 10.0, b � 5.0, c � 7.0 A ˚ , b…