Materials Literature
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The pressure dependences of the lattice parameters of two spin transition compounds have been derived from neutron powder diffraction measurements at ambient temperature. The study of Fe(PM–AzA) 2 (NCS) 2 [PM is N -2′-pyridylmethylene and AzA is 4-(phenylazo)aniline] has been used to validate this new type of investig…
Abstract Flax fiber was modified through grafting of binary vinyl monomers mixtures such as methyl methacrylate (MMA)/vinyl acetate (VA), MMA/acrylamide (AAm), and MMA/styrene (Sty) under the influence of microwave radiations. 24.64% grafting was found at 210 W microwave power under optimum reaction conditions. Graft…
Bacteriochlorins absorb strongly in the near-infrared spectral region and hence are ideally suited for diverse photomedical applications, yet naturally occurring bacteriochlorins have limited stability and synthetic malleability. A de novo route has been exploited to prepare synthetic bacteriochlorins that bear a gemi…
A Pt/Mg 0.59 Zn 0.41 O Schottky photodiode on a ZnO single crystal is reported. The Mg 0.59 Zn 0.41 O film was deposited on a ZnO single crystal substrate by an RF magnetron sputtering method. The optical bandgap of the Mg 0.59 Zn 0.41 O film obtained from the spectral transmittance and reflectance, was 4.6 eV. The fa…
Abstract Banana fiber, which is rich in cellulose, relatively inexpensive, and abundantly available, has potential for polymer reinforcement. This study explores the merits of combining high‐modulus glass fibers with banana fiber in phenolic resoles to develop high‐performance, cost‐effective, lightweight hybrid compo…
We measured the conductance fluctuation of bilayer and trilayer graphene devices, which were prepared on mechanically exfoliated graphene by an all-dry, lithography-free process by using an ultrathin quartz filament as a shadow mask. Reproducible fluctuations in conductance as a function of applied gate voltage or mag…
Beam splitting of low-contrast rectangular gratings under second Bragg angle incidence is studied. The grating period is between lambda and 2lambda. The diffraction behaviors of the three transmitted propagating orders are illustrated by analyzing the first three propagating grating modes. From a simplified modal appr…
The success of the ab initio phasing process mainly depends on two parameters: data resolution and structural complexity. In agreement with the Sheldrick rule, the presence of heavy atoms can also play a nonnegligible role in the success of direct methods. The increased efficiency of the Patterson methods and the adve…
Integrating diamond films with GaN-based devices may enhance heat dissipation and thus improve device performance for high power loading. Direct deposition of diamond films on GaN layers has been hampered by GaN degradation in the chemical vapor deposition environment for diamond growth. In this work, three approaches…
The true chemical nature and physical state of the catalyst particles in Catalytic Chemical Vapor Deposition (CCVD) synthesis of carbon nanotubes are the subject of intense discussions, as it is one of the keys to understand their growth mechanisms. The CCVD method considered in this article involves pyrolysis of mixe…
The mesomorphic phase of poly(butylene-2,6-naphthalate) (PBN) has been studied using wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). It was found that PBN showed a mesomorphic phase when it was rapidly quenched from the molten state to 0 °C. The mesomorphic PBN was nearly transparent s…
The incorporation of manganese into the amorphous mesoporous material TUD-1 ( n Si / n Mn = 89−8; Mn content: 1−11 wt %) was achieved by the direct hydrothermal method in the presence of triethanol amine. Nitrogen sorption revealed the mesoporous nature ( d P = 4−9 nm) of MnTUD-1 and a decreasing specific surface area…
Molecular dynamics (MD) simulations of more than 40 model systems of dry and hydrated poly(pyromellitimide-1,4-diphenyl ether) (PMDA-ODA) polyimide, also known as Kapton, were undertaken in order to study the specific interactions between water and a glassy polymer matrix. Dry amorphous Kapton models were generated us…
A ${\text{TiO}}_{2}(110)$ surface was bombarded with slow iodine highly charged ions (HCIs), ${\text{I}}^{q+}$, having a wide range of charge states from Ni-like ${\text{I}}^{25+}$ to He-like ${\text{I}}^{51+}$. A scanning tunneling microscopic observation revealed that nanometer-sized hillock or crater structures wer…
The valence electron density of the protein human aldose reductase was analyzed at 0.66 angstroms resolution. The methodological developments in the software MoPro to adapt standard charge-density techniques from small molecules to macromolecular structures are described. The deformation electron density visible in in…
Polycrystalline BiFeO 3 (BFO), Nd-doped (BNF), Mn-doped (BFM), and (Nd,Mn)-codoped BiFeO 3 (BNFM) thin films were fabricated on Pt/SrTiO 3 (100) substrate by pulsed laser deposition. According to the X-ray diffraction analysis and atomic force microscope observation, suppression of impurity phases and improvement of s…
Abstract L‐arginine hydrochloride monohydrate (LAHCl.H 2 O) has been synthesized and single crystals have been grown from its aqueous solution by slow evaporation and slow cooling methods. The solubility of the material was measured at various temperatures and bulk crystals of size 26×13×11 mm 3 have been grown by opt…
Perovskite-related strontium orthoferrite, SrFeO 3−δ , has been fluorinated by a low temperature reaction with poly(vinylidene fluoride) to give the compound SrFeO 2 F. X-ray powder diffraction shows that fluorination leads to an expansion of the unit cell which is consistent with partial replacement of oxygen by fluo…
The adsorption kinetics and dynamics of typical combustion gases have been studied on CaO(100) by means of temperature programmed desorption and molecular beam scattering. In addition, the sample has been characterized by Auger electron spectroscopy. Whereas CO interacts rather weakly with CaO and adsorbs molecularly…
Sisal and oil palm fibers were incorporated into a natural rubber matrix, and the influence of fiber ratio on the cure and tensile properties of hybrid fiber-reinforced natural rubber composites were analyzed. Tensile strength and modulus was found to decrease with the loading of oil palm fiber. Longitudinally oriente…