Materials Literature
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Epitaxial strain can induce the formation of morphotropic phase boundary in lead free ferroelectrics like bismuth ferrite, thereby enabling the coexistence of tetragonal and rhombohedral phases in the same film. The relative ratio of these phases is governed by the film thickness and theoretical studies suggest that t…
Transport and magnetic properties of Co-doped BaFe2As2 epitaxial thin films grown on MgO substrate, Mohan, Shyam, Taen, Toshihiro, Yagyuda, Hidenori, Nakajima, Yasuyuki, Tamegai, Tsuyoshi, Katase, Takayoshi, Hiramatsu, Hidenori, Hosono, Hideo
Poplar seed hair fibers, harvested from the seed pods of one of the most common trees grown in the United States, have properties that make them ideal fibers for thermal insulation applications. This preliminary study examines some physical, chemical, and thermal characteristics of poplar fiber in relation to wool, do…
Electrospinning constitutes a simple and versatile approach of fabricating polymer heterostructures composed of nanofibers. A preferred alignment of polymer crystallites stems from complex shear elongational forces and generates a strong intrinsic optical anisotropy in typical electrospun fibers of semicrystalline pol…
The single n-ZnO:In/i-ZnO/p-GaN-heterostructured n-i-p nanorod was deposited using a vapor cooling condensation system. The photoelectrochemical system was used to directly passivate the nanorod sidewall surface with a Zn(OH)2 layer. The electrical performance of the passivated and unpassivated single nanorod was meas…
Force field molecular dynamics simulations on a decapeptide in contact with a rutile (100) surface in aqueous solution are reported. The peptide sequence is part of α(1)-collagen. Force-distance curves yield discrete peaks to the rupture of charged lysine and glutamate side chains from the surface according to the mod…
Abstract The stress relaxation response in the glassy state just below T g was measured for poly(methylmethacrylate) following application of constant strain rate uniaxial tensile deformation at various locations on the stress–strain curve, including the yield and post‐yield region. The macroscopic mobility was determ…
We have initiated a broad-based program aimed at understanding the molecular basis of fluorine specificity in enzymatic systems, and in this context, we report crystallographic and biochemical studies on a fluoroacetyl-coenzyme A (CoA) specific thioesterase (FlK) from Streptomyces cattleya. Our data establish that FlK…
The influence of the formulation process/pathway on the generation of electrostatic complexes made from polyelectrolyte-neutral copolymers and oppositely charged nanocolloids is investigated in this work. Under strong driving forces like electrostatic interaction and/or hydrogen bonding, the key factor controlling the…
Degradable polymers with specifically designed functionality have wide applications in biomedical fields. We reported herein the synthesis and characterization of a water-soluble and fast-degradable polycarbonate, functionalized with tertiary amine groups in the backbone. A novel cyclic carbonate monomer, namely, 6,14…
Interdiffusion has been studied in Ag/Au hemispherical core-shell structures on sapphire substrate. In isothermal heat treatments first a relatively fast growth of nanovoids was observed, which was followed by a slower shrinkage process. The void formation is interpreted by pure Kirkendall-porosity formation since Ag-…
Self-consistent field theory methodology is used to explore the graphoepitaxy of spherical-morphology block copolymers templated by an array of posts, as well as to predict the formation of aperiodic templated structures, giving an excellent agreement with experimental results. Simulations in two and three dimensions…
In orthogonaler Weise lässt sich ein multistabiler [2×2]-Fe4-Gitterkomplex (siehe Struktur) durch Spin-Crossover und sequenzielle Redoxprozesse schalten. Bei Oxidation schaltet die magnetische Kopplung von antiferromagnetisch zu ferromagnetisch. Der [HS-LS-HS-LS]-FeII4-Zustand und die [FeII2FeIII2]-Form sind jeweils z…
We fabricate light-emitting diodes (LEDs) based on Mn-doped ZnS nanocrystals along with hole-transporting N,N′ bis(3-methylphenyl)-N,N′-diphenyl-benzidine (TPD). With Mn-doping, ZnS nanostructures exhibit a strong photoluminescence. The LEDs exhibit electroluminescence (EL) from Mn-doped ZnS quantum dots and TPD. In o…
Many applications require nanoparticles that exhibit high magnetic moment and luminescence. Compounds exhibiting this combination of properties do not exist. However, this combination of properties may be obtained by nanocomposites. There are two possible configurations for these composites: the core-shell design, lea…
Block-copolymer containing a poly(L-lactic acid) (PLLA) segment was blended with pure poly(D-lactic acid) (PDLA) chain in chloroform solution and casted into the dried film. This method could form the stereocomplex (Sc) crystal of PLLA/PDLA within the nanometer-sized phase separation self-assembled by block-copolymer.…
Correlation of charge state of Mn with the increase in resistivity with Mn concentration is demonstrated in Mn-doped indium tin oxide films. Bonding analysis shows that Mn 2p3/2 core level can be deconvoluted into three components corresponding to Mn2+ and Mn4+ with binding energies 640.8 eV and 642.7 eV, respectively…
Variable-field Hall measurements were performed on epitaxial graphene grown on Si-face and C-face SiC. The carrier transport involves essentially a single-type of carrier in few-layer graphene, regardless of SiC face. However, in multilayer graphene (MLG) grown on C-face SiC, the Hall measurements indicated the existe…
Nanoparticles show several interesting new physical and biological properties and therefore play an increasing role in pharmaceutics and medicine. For more than 30 years this research field has been developing slowly but steadily from physical and biological interest (bench) to applications in clinics (bedside). Howev…
We investigate surface-enhanced Raman scattering (SERS) from gold-coated silicon-germanium nanocone substrates that are decorated with 30-nm spherical gold nanoparticles (AuNPs). Finite-element simulations suggest that individual nanocones generate stronger electromagnetic enhancement with axial polarization (i.e., po…