Nanoscaled inorganic materials by molecular design
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Strong two-photon absorption and its saturation of a self-organized dimer of an ethynylene-linked porphyrin tandem
The two-photon absorption properties of a self-organized dimer of a free-base and zinc(II) porphyrins tandem linked with an ethynylene group and terminated by imidazolyl and phenylethynyl groups were investigated. The self-organized dimer was found to exhibit strong two-photon absorption and furthermore the saturation…
Effect of Process Gases on Fabricating Tapered Through-Silicon vias by Continuous SF6/O2/Ar Plasma Etching
We report on a continuous plasma etching process using SF 6 /O 2 /Ar gases for fabricating 100 μm deep tapered through-silicon vias (TSV). The mask diameters of the vias were 20, 30 and 50 μm. The flow rates of the process gases were changed to study their individual effect on the profile angle, via depth, sidewall ro…
MOLDING THE FLOW OF MAGNETIC FIELD WITH METAMATERIALS: MAGNETIC FIELD SHIELDING
In this paper, it is demonstrated how anisotropic and inhomogeneous magnetic metamaterials may be used for molding the flow of the magnetic field, considering magnetic field shielding as the main application of practical interest.It is shown that using anisotropic materials, magnetic field shielding may be improved, a…
Perylenediimide functionalized bridged-siloxane nanoparticles for bulk heterojunction organic photovoltaics
Perylenediimide functionalized bridged siloxane nanoparticles were prepared by direct hydrolysis and condensation of a perylenediimide silane precursor in the presence of a catalytic amount of tetraethoxysilane (TEOS). The sizes of the particles were controlled by adjusting organotrialkoxysilane, base, and TEOS concen…
Anion binding induced conformational changes exploited for recognition, sensing and pseudorotaxane disassembly
Investigations to exploit the anion binding induced conformational changes displayed by a new class of acyclic receptor for anion recognition, fluorescence sensing and pseudorotaxane disassembly are described. A series of imidazolium-appended bis-amide-pyridine, pyridine N-oxide and pyridinium containing receptors are…
Correlation between the Solution Chemistry to Observed Properties of CdTe Thin Films Prepared by CBD Method
The promising solar material Cadmium Telluride (CdTe) is successfully deposited on both plain glass and ITO coated glass substrates. Many variations in composition of the solution used for deposition of the film are made to optimize the deposition conditions. The bandgap calculated from optical transmission studies is…
Morphologic and Pharmacological Investigations in the Epicatechin Gastroprotective Effect
Previous studies of the gastroprotective activity of plants have highlighted the importance of the polyphenolic compound epicatechin (EC) in the treatment of gastric ulcers. This paper aimed to evaluate and characterize the gastroprotective mechanism of action of EC using male rats. The gastroprotective action of EC w…
Counter anion dependent swelling behaviour of poly(octadecyl acrylate)-based lipophilic polyelectrolyte gels as superabsorbent polymers for organic solvents
Molecular design of superabsorbent materials for organic solvents has attracted much attention due to their superior applications for the removal of hazardous leakages or spillages of volatile organic compounds (VOCs) and waste oils. One approach for preparing such soft matter is loosely crosslinked lipophilic polyele…
ortho-Phenylene oligomers with terminal push–pull substitution
ortho-Phenylenes are an emerging class of helical oligomers and polymers. We have synthesized a series of push-pull-substituted o-phenylene oligomers (dimethylamino/nitro) up to the octamer. Conformational analysis of the hexamer using a combination of low-temperature NMR spectroscopy and ab initio predictions of (1)H…
CuproCleav-1, a first generation photocage for Cu+
By utilizing thioether ligands, CuproCleav-1 stabilizes Cu(+) complexes in aqueous solution and releases the guest metal ion upon photolysis of the nitrobenzyl group. The photocage has an apparent K(d) of 54 pM for Cu(+), and metal ion release has been demonstrated using the fluorescent sensor CS1.
Photocatalyst activation by intrinsic stimulation in TiO2–BaTiO3
We report a nanoparticulate composite TiO2–BaTiO3 film which exhibits an increased antibacterial photocatalytic activity under visible light. The pure BaTiO3, TiO2 or their mixture do not attain a significant photocatalytic capacity under visible light. However, when these oxides are simultaneously synthesized under c…
Tuning the selectivity and sensitivity of mesoporous dielectric multilayers by modifiying the hydrophobic–hydrophilic balance of the silica layer
We investigate the possibility of tuning the selectivity and sensitivity of SiO2/TiO2 mesoporous dielectric multilayers for the adsorption of analytes with different chemical polarities. The hydrophilic–hydrophobic balance of the mesoporous SiO2 layer was controlled by one-pot co-condensation of mixtures of methyltrie…
Study on the thermal reactions of [60]fullerene with amino acids and amino acid esters
Thermal reactions of [60]fullerene with a series of amino acids and amino acid esters under aerobic and dark conditions have been investigated. Fulleropyrrolidines can be obtained from these reactions although an aldehyde is not added purposely. Possible reaction mechanisms involving uncommon C-N bond cleavages have b…
Real Time Observation of the Directional Solidification of Multicrystalline Silicon: X-ray Imaging Characterization
Directional solidification of multicrystalline silicon for photovoltaic applications is investigated by means of synchrotron X-ray imaging techniques at the European Synchrotron Radiation Facility. Our experimental device combines two complementary modes: X-ray radiography imaging giving information on the dynamical e…
Large-area, crack-free polysilazane-based photonic crystals
Large-area, crack-free inverse opal photonic crystals were successfully fabricated by conventional colloidal self-assembly method with poly(St-MMA-AA) as the opal template and a thermosetting polysilazane as the infiltrating polymer. The phenomenon of self-healing of cracks in the opal template was observed and attrib…
Optimal magnet shaping with third order harmonic for maximum torque in brushless AC machines
This paper describes the optimal magnet shaping techniques to increase the torque capability in brushless AC machines by utilising the 3rd order harmonic in inverse cosine shape airgap and sinusoidal shape magnet. It is analytically found that for different types of magnet shaping methods, the optimal magnitude of the…
In situ synthesis of nickel tiara-like clusters with two different thiolate bridges
Four nickel clusters, cyclo-[{Ni(μ-S(i)Pr)(μ-SMe)}(6)] (1), cyclo-[{Ni(μ-StBu)(μ-SMe)}(6)] (2), cyclo-[{Ni(μ-S(i)Pr)(μ-SEt)}(6)] (3) and cyclo-[{Ni(μ-StBu)(μ-SEt)}(10)] (4), based on thiolate ligands have been successfully synthesized and characterized by elemental analysis, FT-IR spectra, UV-vis-NIR spectra, powder X…
Physical Properties of Nano-Composite Silica-Phosphate Thin Film Prepared by Sol Gel Technique
A series of silica-phosphate nano-composites prepared as a host thin films Physical Properties of Nano-Composite Silica-Phosphate Thin Film Prepared by Sol Gel Technique and doped with different concentrations of Er3+ ions have been synthesized using tetraesoxysilane TEOS, triethylphosphate TEP and erbium nitrate as p…
How to achieve maximum charge carrier loading on heteroatom-substituted graphene nanoribbon edges: density functional theory study
The practical number of charge carriers loaded is crucial to the evaluation of the capacity performance of carbon-based electrodes in service, and cannot be easily addressed experimentally. In this paper, we report a density functional theory study of charge carrier adsorption onto zigzag edge-shaped graphene nanoribb…