Materials Literature
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The synthesis of well-defined poly (ionic liquid) brushes with tunable wettability using surface initiated atom transfer radical polymerization (ATRP) was reported. Various characterization techniques including ellipsometry, static water contact angle measurements, attenuated total reflection infrared spectroscopy (AT…
We demonstrated the synthesis of LaPO 4:Er:Yb-doped nanoparticles/nanorods and LaPO 4:Er@Yb core−shell nanoparticles/nanorods by a solution-based technique. The mechanism related to morphology control of LaPO 4:Er:Yb nanorods/nanoparticles is proposed and discussed. Bright-green (550 nm) and red (670 nm) emission were…
Metamaterials are beginning to transform optics and microwave technology thanks to their versatile properties that, in many cases, can be tailored according to practical needs and desires. Although metamaterials are surely not the answer to all engineering problems, they have inspired a series of significant technolog…
Multi-valley spin relaxation in $n$-type GaAs quantum wells with in-plane electric field is investigated at high temperature by means of kinetic spin Bloch equation approach. The spin relaxation time first increases and then decreases with electric field, especially when the temperature is relatively low. We show that…
Density functional calculations are performed to investigate the room temperature ferromagnetism in GaN:Cu nanowires (NWs). Our results indicate that two Cu dopants are most stable when they are near each other. Compared with bulk GaN:Cu, we find that magnetization and ferromagnetism in Cu doped NWs are strongly enhan…
Controlling novel morphologies and developing effective doping strategies are two important tasks for advancing ZnO-based nanomaterials. We have grown vertically aligned Cu-doped ZnO nanonails and nanoneedles and observed a continuous evolution between various morphologies. Selecting source compositions and regulating…
Two methods of reduction of V 2 O 5 have been investigated: oxygen vacancy formation and lithium intercalation. The electronic structure, geometry, and energetics of these reduced systems are examined. Oxygen vacancies in bulk α-V 2 O 5 have been investigated by using gradient-corrected density functional theory (GGA)…
Position sensitivity of transient photoconductivity has been observed in oxygen-deficient La 0.67 (Ca 0.75 Ba 0.25 ) 0.33 MnO 3−δ (LCBMO) thin films at room temperature. The voltage drop across the reference resistor is sensitive to the position of the laser spot between the electrodes on the films. The phenomenon has…
Abstract To estimate the effects of diastereomeric copolymers as photoresists, diastereomeric copolymers containing chiral and racemic bornyl methacrylates (BMAs) were synthesized. Both alicyclic BMAs were synthesized from (−)‐borneol and (±)‐borneol, and then copolymerized with t‐butyl methacrylate (t‐BMA), tetrahydr…
Gasoline, diesel, and other alternative transportation fuels contain hundreds to thousands of compounds. It is currently not possible to represent all these compounds in detailed chemical kinetic models. Instead, these fuels are represented by surrogate fuel models which contain a limited number of representative comp…
Two new generations of ligands for cytochrome c oxidase mimicking have been designed and synthesized via an efficient, convergent, and versatile synthesis. These porphyrins are functionalized with both an internal nitrogen base on one side and a triaza (N3) or a triaza-phenol (N3O) moiety on the other side, attached t…
Density functional calculations have been performed to investigate the destruction of narrow carbon nanotubes (CNTs) under the attack of nitronium tetrafluoroborate salts. The dissociation of these salts in a solvent produces nitronium and tetrafluoroborate ions which coadsorb on the external surface of the tubes. It…
The resistance of polycrystalline materials to intergranular cracking can be influenced by the microstructure. In sensitized stainless steels, for example, the grain boundaries prone to sensitization form paths of low resistance for intergranular stress corrosion cracking. The nonsensitized grain boundaries, such as t…
CBS domains are small protein motifs, usually associated in tandem, that are implicated in binding to adenosyl groups. Several genetic diseases in humans have been associated with mutations in CBS sequences, which has made them very promising targets for rational drug design. Trigonal crystals of the CBS-domain protei…
The effects of alignment perturbations on the aberration fields of two mirror astronomical telescopes are discussed. It is demonstrated that expressions describing alignment induced field-linear astigmatism, published by McLeod based on the work of Schroeder, can be obtained using nodal aberration theory. Rather than…
A local plasmon resonance on a metal wedge is studied by using the Meixner approach [J. Meixner, IEEE Trans. Antennas Propag.AP-20, 442 (1972)]. It is found that the singular field behavior of a local plasmon resonance as a function of the distance from the edge of the wedge is sensitive to the wavelength and wedge an…
In the present contribution, a density functional theory (DFT) investigation is described regarding a recently synthesized Fe 6 S 6 complex – see C. Tard, X. Liu, S.K. Ibrahim, M. Bruschi, L. De Gioia, S.C. Davies, X. Yang, L.-S. Wang, G. Sawers, C.J. Pickett, Nature 433 (2005) 610 – that is structurally and functiona…
Wood creosote administered to rats prevented castor-oil-induced diarrhea with an ED50 of 53 mg/kg p.o. This antidiarrheal effect was apparently produced by acceleration of net fluid absorption from the intestine, as shown by a 52% decrease (p < 0.001) of residual fluid volume in an intestinal loop, and partly by suppr…
Pseudomonas putida strain PP3 produces two dehalogenases, DehI and DehII, which belong to the group I and II alpha-haloacid dehalogenases, respectively. Group I dehalogenases catalyse the removal of halides from D-haloalkanoic acids and in some cases also the L-enantiomers, both substituted at their chiral centres. St…
Abstract A model based on the combination of Hansen solubility parameter theory and Flory‐Rehner polymer solution theory was used to determine the solubility parameters of butyl glove material provided by several different manufacturers using a nonlinear least‐square regression. To evaluate the validity of this model,…