Materials Literature
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Dual responsive molecular brushes consisting of statistical copolymers of di(ethylene glycol) methyl ether methacrylate (MEO 2 MA) and either methacrylic acid (MAA) or N,N -dimethylaminoethyl methacrylate (DMAEMA) were synthesized by grafting from poly(2-(2-bromoisobutyroyloxy)ethyl methacrylate (PBIEM) macroinitiator…
The effect of cobalt and nickel substitutions for manganese on the physical properties of the perovskite manganite La1.2Bi0.8Mn2-x(Ni/Co)xO6+d, with x = 0.0-0.8, has been investigated. It is observed that the ferromagnetism is enhanced, TC being increased from 103 K for the parent compound (x = 0.0) to 178 K for Ni-ph…
Using a combination of vertical transport measurements across and lateral transport measurements along the LaAlO$_{3}$/SrTiO$_{3}$ heterointerface, we demonstrate that significant potential barrier lowering and band bending are the cause of interfacial metallicity. Barrier lowering and enhanced band bending extends ov…
The coupling with the lattice vibrations is shown to drastically modify the state-of-the-art picture of the excitonic states based on a frozen-atom approximation. The zero-point vibrations renormalize the bare energies and optical strengths. Excitons acquire a nonradiative lifetime that decreases with increasing tempe…
The pharmaceutical co-crystal approach has been introduced recently to address poor physicochemical properties of new chemical entities. In this study we prepared and investigated ten co-crystals of AMG 517. Based on thermal analysis, 1 H NMR and p K a values we have prepared co-crystals rather than solvates or salts.…
Direct measurement of the remanent polarization of high quality (001)-oriented epitaxial BiFeO3 thin films shows a strong strain dependence, even larger than conventional (001)-oriented PbTiO3 films. Thermodynamic analysis reveals that a strain-induced polarization rotation mechanism is responsible for the large chang…
In this paper, we report the assembly of single-walled carbon nanotubes (SWNTs) and single-stranded DNA to develop a new class of fluorescent biosensors which are able to probe and recognize biomolecular interactions in a homogeneous format. This novel sensing platform consists of a structure formed by the interaction…
This paper reports a novel static method to fabricate three-dimensional (3D) fibrous tubes composed of ultrafine electrospun fibers. By using this unique technique, micro and macro single tubes with multiple micropatterns, multiple interconnected tubes, and many tubes with the same or different sizes, shapes, structur…
Access to excited-state structures and dynamics of pi-chromophor aggregates is needed to understand their fluorescence behavior and the properties of related materials. A quantum-chemistry-based protocol that provides quantitative and qualitative insight into fluorescence spectra has been applied to perylene bisimide…
Phthalocyanines and porphyrins are versatile functional pigments with a wide range of applications. These macrocyclic compounds contain four isoindole or pyrrole nitrogen atoms, which can complex with a range of metal ions. Large rare earth metal ions can bring together these tetrapyrrole derivatives to form sandwich-…
We perform electrical transport measurements in graphene with several sample geometries. In particular, we design ``invasive'' probes crossing the whole graphene sheet as well as ``external'' probes connected through graphene side arms. The four-probe conductance measured between external probes varies linearly with c…
Abstract Poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyhexanoate) (PHBHHx) is a thermoplastic biopolyester with a slow crystallization rate. L ‐Phenylalanine ( L ‐PH) was used to improve the crystallization rate of PHBHHx. The nonisothermal crystallization kinetics and melting behaviors of PHBHHx and PHBHHx/ L ‐PH samples were…
We have investigated backflow and dynamic behavior of a homogeneously aligned liquid crystal cell in the modulated electric field. We quantitatively describe the dynamic behavior of director, flow velocity, and fluid displacement. The numerical calculation shows the whole dynamic process of director and flow in the mo…
A series of planar Ni(II) dithiolenes derived from maleonitriledithiole (mnt), benzene-1,2-dithiole (bdt) and 1-toluene-3,4-dithiole (tdt) with bidentate N,N-ligands (bpy = 2,2′-bipyridine; phen = 1,10-phenanthroline, nphen = 5-nitro-1,10-phenanthroline) of the [Ni(N,N)(dithiol)] type have been synthesized. The compou…
To Be or not to Be: Be binds strongly to the three-dentate ligand 2,6-bis(2-hydroxyphenyl)pyridine in a 1:1 ratio with no bridging phenolates (see structure; Be green, C gray, H white, O red, N blue). As Be binds and displaces the strong hydrogen bonds, the ligand fluoresces. The fluorescence is very specific for Be a…
We study spatially isolated, individual gold nanorods placed at a planar interface between two dielectric media using confocal interference scattering microscopy in combination with higher order laser modes. Approaching refractive index matching conditions, we observe that the elastic scattering patterns of individual…
Abstract The Hg‐substituted type‐I clathrates A 8 Hg 3+ x Ge 43– x (A = K, Rb) were obtained by solid‐state reactions from the corresponding Zintl phases A 4 Ge 9 and Hg or HgO. The crystal structures of the compounds were determined by single‐crystal and powder X‐ray diffraction methods. They crystallize in the space…
In a previous work, the authors have presented a comprehensive procedure for the direct characterization of single piezoelectric ceramic fibers in terms of butterfly and polarization loops and blocking force. The ability to investigate single fibers is relevant for optimizing their manufacturing processes, for quality…
We extend our recent work on phase-field model for vesicles [D. Jamet and C. Misbah, Phys. Rev. E 76, 051907 (2007)]-where only the membrane local incompressibility was treated-to the situation where the bending forces and spontaneous curvature are included. We show how the general phase-field equations can be derived…
AM50 magnesium alloy is treated by PEO process using four different electrolytes which are combination of K 3 PO 4 and Na 3 PO 4 plus two different hydroxides, i.e. KOH and NaOH. Basic properties of the electrolyte such as pH, conductivity and breakdown voltage were measured. Moreover, coatings were characterised by s…