Materials Literature
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The non-uniform chain manganese(III) complex constructed from EE-azido bridged MnIII3O units, [MnIII3O(Brppz)3-(MeOH)3(N3)] 2MeOH [1, Brppz = 3-(5-bromo-2-phenolate)-pyrazolate], is the first example of 1D azido-bridged coordination polymer showing both solvatomagnetic effect and spin-glass behavior.
Epitaxial films of an alternative multiferroic material, GaFeO3 (GFO), were grown by pulsed laser deposition on yttrium-stabilized zirconia (001) and on conducting buffer layers of indium tin oxide (001). They present a perfect epitaxial growth along the GFO [010] axis and six crystallographic variants in the film’s p…
Using first-principles computations, we studied NH3 adsorption on a series of zigzag (n,0) single-walled BN nanotubes (BNNTs) and the effect of gas coverage. Tube diameter and NH3 coverage play important roles on the tube-NH3 interaction. Chemisorption of a single NH3 molecule on top of B site is energetically prefera…
Zn 0.76 Mg 0.24 O p-n photodiode was fabricated on (000l) Al2O3 substrate by plasma-assisted molecular beam epitaxy. Ni∕Au and In metals deposited using vacuum evaporation were used as p-type and n-type contacts, respectively. Current-voltage measurements on the device showed weak rectifying behavior. The photodetecto…
The recent advances in the study of light emission from matter induced by synchrotron radiation: X-ray excited optical luminescence (XEOL) in the energy domain and time-resolved X-ray excited optical luminescence (TRXEOL) are described. The development of these element (absorption edge) selective, synchrotron X-ray ph…
Enantiodifferentiating photoisomerization of (Z)-cyclooctene included and sensitized by m-methoxybenzoyl-beta-cyclodextrin gave chiral (E)-isomers in up to 46% enantiomeric excess, which is the highest value ever reported for supramolecular photochirogenesis with analogous hosts, thus demonstrating the crucial role of…
We report on a generic approach for immobilizing quantum dots (CdTe nanoparticles) on thin, fluid films consisting of poly(acrylic acid) (PAA) polymer chains tethered by one end to an underlying substrate in a polymer brush configuration. The protocol involves covalent bonding (amide linkage) between amino groups pres…
A new strategy for the encapsulation of magnetic nanobeads was developed by using the in situ self-assembly of an organic-inorganic hybrid polymer. The hybrid polymer of {[Cu(bpy)(BF(4))(2)(H(2)O)(2)](bpy)}(n) (bpy=4,4'-bipyridine) was constructed on the surface of amino-functionalized magnetic beads and the resulting…
Abstract The biaxial stretchability and film properties of polylactide/thermoplastic starch blends were investigated. Polylactide (PLA) and thermoplastic starch (TPS) were blended in various proportions. Blends containing 27, 42 and 60 wt.% TPS were prepared via a twin-screw extrusion process. Interfacial modification…
We present a detailed investigation on the origin of the room-temperature visible luminescence in hydrogenated amorphous silicon nitride films. In combination with Raman spectroscopy and high resolution transmission electron microscopy, we demonstrate clearly that the red light emission originates from amorphous silic…
Two new insoluble transition metal substituted phosphotungstates, (C2N2H10)11[{(B-alpha-PW9O34)Fe3(OH)3}4(PO4)4Fe].38H2O(1) and K4(C2N2H10)12[(alpha-PW10Fe2O39)4].30H2O(2), have been isolated by the hydrothermal reaction of [A-alpha-PW9O34]9-, Fe(III) ions and ethylenediamine. Compound 1 has a tetrahedral symmetry and…
The dependence of the magnetic properties on oxygen concentration in epitaxial La2CoMnO6 thin films deposited on (100)-oriented SrTiO3 substrates has been investigated by varying the oxygen background pressure during growth using pulsed laser deposition. Two distinct ferromagnetic (FM) phases are revealed, and the rel…
Every carbon single-walled nanotube (SWNT) can be generated by first mapping only two nearest-neighbor C atoms onto a surface of a cylinder and then using the rotational and helical symmetry operators to determine the remainder of the tubule [C. T. White et al., Phys. Rev. B 47, 5485 (1993)]. With account of these sym…
We report Raman scattering from single and ensemble CdS nanowires, nanobelts, and nanosheets. The Raman spectra of nanobelts and nanosheets are notably different from those of nanowires, exhibiting a strong enhancement of the multiphonon response. Moreover, the first-order longitudinal optical (LO) phonon energy syste…
P -type conductivity has been observed in CaCu3Ti4O12 (CCTO) ceramics and also in thin films deposited by pulsed laser deposition. I-V and C-V relationships of the CCTO thin films showed characteristics typical of a tunnel metal-insulator-semiconductor structure, evidencing its capacitance response as the origin of th…
The particles of photopolymerizable monomer/chiral dopant composites with a crystalline (Cr)-chiral nematic (N*) phase transition were prepared. By mixing the particles with different pitches of the N* phase together with the Cr phase and making the liquid crystal (LC) monomer molecules cross-linked by photopolymeriza…
Measurements of ferroelectric polarization and dielectric constant were done on $R{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ $(R=\mathrm{Tb},\mathrm{Dy},\mathrm{Ho})$ with applied hydrostatic pressures of up to $18\phantom{\rule{0.3em}{0ex}}\mathrm{kbar}$. At ambient pressure, distinctive anomalies were observed in the temper…
The energy level alignment at interfaces, in stacks comprising of (4,4′-N,N′-dicarbazolyl-biphenyl) (CBP), (4,4,4″-tris[3-methyl-phenyl(phenyl)amino]-triphenylamine) (m-MTDATA), and a conductive substrate, has been studied. We show that the alignment of energy levels depends on the equilibration of the chemical potent…
To fully exploit the promise of molecular materials for NLO applications, inter- and supramolecular interactions must be accounted for. We review our recent work on electrostatic interchromophore interactions in multichromophores for NLO applications. The discussion is based on a bottom-up modeling strategy: each chro…
Abstract The bis(guanidine)‐stabilised zinc complexes [ N 1 , N 2 ‐bis(1,3‐dimethylimidazolidin‐2‐ylidene)ethane‐1,2‐diamine]dichloridozinc(II), [Zn(DMEG 2 e)Cl 2 ] ( C1 ), diacetato[ N 1 , N 2 ‐bis(1,3‐dimethylimidazolidin‐2‐ylidene)ethane‐1,2‐diamine]zinc(II),[Zn(DMEG 2 e)(CH 3 COO) 2 ] ( C2 ), and bis[ N 1 , N 2 ‐b…