Materials Literature
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The molecular dynamics simulation (MD) method has been widely applied to the investigation of the thermal conductivity of single crystalline materials during last decade but no report on the thermal conductivity of polycrystalline solids by direct MD simulation with three-dimensional polycrystalline structure is found…
Abstract High‐molecular‐weight polythiocaprolactone (PTCL) was prepared in a green process via lipase‐catalyzed ROP of a cyclic 6‐mercaptohexanoic acid (6MH) oligomer. PTCL was readily depolymerized by lipase to cyclic 6MH in dilute toluene solution, which was then readily repolymerized by the same lipase to produce P…
We report on the photoconductance characteristics of indium tin oxide (ITO)-GaAs photodetectors based on patterned nanopillar (NP) arrays grown by metal-organic chemical vapor deposition. The NPs are partially encapsulated by commercially available polymer to allow transparent ITO contact to exposed NP tips. Under ill…
First-principles calculations are performed to study the adsorption and oxidation of CO on three decahedral Au clusters with the stability sequence of Au 146 > Au 75 > Au 101 . Our calculations suggest that a cluster with a moderate stability should be an ideal catalyst when structural differences are excluded. As exe…
We measured the thermal and charge transport properties of perovskite-related layered structures. Strontium-Niobates, which were expressed as SrnNbnO3n+2 (n=4: Sr1.8La0.2Nb2O7, n=5: Sr5Nb5O17), to explore their thermoelectricities and thermal anisotropies. The behaviors of the thermoelectric parameters (thermal conduc…
We analyzed the crystallographic relationships during hydrothermal conversion of a calcitic sea urchin spine into apatite. We identified a pseudomorphic mineral replacement mechanism involving a superficial dissolution of calcite and a subsequent overgrowth of oriented carbonated hydroxylapatite (HA) nanocrystals. Cro…
Despite the commercial importance of molecular salts in pharmaceutical applications, there are few previous studies of their phase behavior in binary and ternary systems. In this current study salt formation is explored in both the binary system (1 R,2 S )-(−)-ephedrine/pimelic acid and in the related ternary system u…
Granular packings slowly driven towards their instability threshold are studied using a digital imaging technique as well as a nonlinear acoustic method. The former method allows us to study grain rearrangements on the surface during the tilting and the latter enables us to selectively probe the modifications of the w…
The magnetoelectric (ME) coupling in Terfenol-D/P(VDF-TrFE)/Terfenol-D laminate is investigated as a function of the applied static magnetic field (Hs) and the frequency of the alternating magnetic field. A three-dimensional surface chart of ME coefficients (αME) versus Hs and frequency of the alternating magnetic fie…
We demonstrate here that rationally designed block copolypeptides based on poly(L-arginine) and β-sheet peptides can form toroidal nanostructures. In aqueous solution, we found that 1D nanoribbons roll up and connect in an end-to-end fashion under charge-balanced conditions, resulting in the formation of barrel-like t…
We report the facile optical creation of switchable localized structures in chiral liquid crystals doped with fullerene. In a cholesteric cell unwound by vertical boundary conditions, the initially dispersed fullerenes are deposited from the bulk to the surface of confining glass plates by low-intensity illumination.…
The complex permeability dispersions: relaxation and resonance are investigated in the Ni0.7Zn0.3Fe2O4 ferrites doped with V2O3 at different weight percent. The complex permeability was measured at frequencies in the 30 kHz to 6 GHz range. The intragranular porosity plays an important role to distinguish between relax…
ZnO nanotubes (ZNTs) have been successfully evolved from ZnO nanorods (ZNRs) by a simple chemical etching process. Two peaks located at 382 and 384 nm in the UV emission region has been observed in the room temperature photoluminescence (PL) spectrum of ZNTs since the surface band bending in ZNTs induces the coexisten…
Magnetic properties and magnetocaloric effect of the Mn5PB2 compound have been investigated. The maximum values of magnetic entropy change −ΔSM at 302 K are 4.93 and 2.64 J kg−1 K−1 for magnetic field changes of 5 and 2 T, respectively, which are closely related with a second-order magnetic transition from the ferroma…
The magnetic states of Mn and Co atoms in Co-rich ${\text{Co}}_{2}\text{MnGe}$ Heusler alloy thin films facing an MgO barrier were studied by means of soft x-ray magnetic circular dichroism (XMCD). In particular, the ${\text{Co}}_{2}\text{MnGe}$ film-thickness dependence of the Mn and Co magnetic moments was investiga…
The Engh and Huber parameters for bond lengths and bond angles have been used uncontested in macromolecular structure refinement from 1991 until very recently, despite critical discussion of their ubiquitous validity by many authors. An extensive analysis of the backbone angle τ (N-C(α)-C) illustrates that the Engh an…
The magnetic behavior of La0.67Sr0.33MnO3 (LSMO) films grown on SrTiO3 (110) substrates was studied. In-plane uniaxial magnetic anisotropy with the easy axis aligned with the [001] lattice direction was observed, together with an out-of-plane component. This is explained by the crystal structure of the films, which sh…
We report the magnetic properties of antiferromagnetic Cr2O3 from bulk material down to 6 nm nanoparticles. We have found a decrease in the lattice parameters and the cell volume when the size diminishes. On the contrary, the magnetic anisotropy constant, Keff, shows a nonmonotonic behavior. The Keff decreases from it…
Five new metal pyrazine complex templated Anderson−Evans cluster based solids, (Hpyz)[{Co(pyz) 2 (H 2 O) 2 }{CrMo 6 (OH) 6 O 18 }]·2H 2 O ( 7 ), (Hpyz)[{Zn(pyz) 2 (H 2 O) 2 }{CrMo 6 (OH) 6 O 18 }]·2H 2 O ( 8 ), [{Ni(pyz)(H 2 O) 4 } 2 {CrMo 6 (OH) 6 O 18 }](CH 3 COO) 2 ·6H 2 O ( 9 ) (pyz = pyrazine), [Na(CrMo 6 (OH) 8…
Abstract A modular synthesis of short chain length and medium chain length poly(3‐hydroxyalkanoate)s‐ b ‐poly(ethylene glycol) (PHAs‐ b ‐PEG) diblock copolymers is described. First, length‐controlled oligomers of hydrophobic poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBHV), poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyh…