Materials Literature
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Abstract To improve the power conversion efficiency (PCE) of small molecular weight organic photovoltaic cells (OPVs) it is proposed to use a simple fabrication method by controlling the deposition rate of the acceptor material fullerene (C60) in planar heterojunction OPV structures of ITO/poly(3,4‐ethylenedioxythioph…
Abstract Optimizations performed with geometrical, molecular mechanics, and density functional models show that chiral carbon nanotube configuration is slightly twisted with respect to the rolled‐up geometry. The torsion angle is small, <1° Å−1 for ultrathin tubes, and decreases with tube diameter. The effect can be e…
We present new data on the potassium-induced semiconducting to metallic transition of the silicon-terminated β-SiC(100) c(4 × 2) surface, resulting from density functional theory simulations. We have analysed many different SiC(100)-K surface topologies, corresponding to K coverages ranging from 0.08 to 1.25 monolayer…
Abstract The interaction between fullerene C60 and heparin was studied using a fullerene C60‐coated piezoelectric quartz crystal sensor. The irreversible response of the piezoelectric quartz crystal was found which could be attributed to the quite strong adsorption of heparin onto the C60 molecule. Immobilized fullere…
Room temperature ferro-magnetism in Fe-doped CdS nanoparticles (NPs) synthesized by a wet chemical precipitation method is reported. Magnetic studies revealed that pure CdS NPs exhibit diamagnetic behavior as like bulk material, where as 3% Fe doped CdS NPs shows the ferromagnetic behavior. At room temperature, ESR si…
Abstract The title compound, rac‐6,13‐dihydro‐6,13‐methanopentacene (1), has been synthesized and characterized by elemental analysis, FT‐IR, 1H NMR, UV‐Vis, HRMS spectra, cyclic voltammetry and single‐crystal X‐ray diffraction. The crystal belongs to orthorhombic, space group P212121, with Z = 4 and cell dimensions a…
Abstract A new two‐dimensional conjugated (2D conjugated) and side chain isolated polythiophene derivative with a dodecane carbonyl group terminated triphenylamine‐vinylene (CTPA) conjugated side chain and unsubstituted terthiophene spacer, PT4‐CTPA, was designed and synthesized. Compared to its polymer analogue of PT…
Picolinium maleate (PM), a novel organic compound has been synthesised and bulk crystal has been grown from the aqueous solution by slow evaporation technique. The structure of the grown crystal was elucidated by using single crystal XRD analysis and powder XRD pattern further confirmed the crystallinity of the grown…
Sodium chloride admixtured L-alanine single crystals of appreciable size were grown by slow evaporation technique at room temperature. The grown crystals were colourless and transparent. The cell parameters of the crystals were estimated by X-ray diffraction studies. The functional groups have been identified by FTIR…
Thin films of polyvinylidene (PVDF) and its copolymers containing 50 to 30 mole % of trifluoroethylene (TrFE) demonstrate rapid reversal of polarization under applied electric field, and can be used as ferroelectric materials in non-volatile memory devices. In this study, Fourier-transform infrared transmission (FTIR-…
Over the past decade, a huge range of emergent properties have been demonstrated at the interfaces between complex oxides. Such properties represent a paradigm of ‘greater than the sum of parts’, with radically different properties to the parent materials being obtained. Hence, oxide interfaces offer the potential to…
Lead free piezoelectric single crystals of sodium potassium niobate (K 0.5Na0.5)NbO3 single crystals were grown by high-temperature solution method using B2O3 flux The KNN crystals grown by without B2O3 flux and with B2O3 flux are referred to as samples A and B respectively. It was found that additions of small amount…
NexTech Materials is developing sulfur tolerant solid oxide fuel cell stacks for military applications in the 1 to 10 kW range, including unmanned aerial vehicles. NexTech's stacks are based on its patented “FlexCell” planar cell design. There are several unique attributes associated with this design and NexTech's ass…
Click chemistry is used for synthesizing polymers for second order NLO study. The molecular weights found by gel-permeation chromatography (GPC), were in the range of 7000-55000 g/mol. Differential scanning calorimetry shows glass transition temperature (Tg) above 120 oC. From electronic spectra order parameter of the…
The preparation of ordered array of graphene strips with arc lateral shape on graphene layer is described. In the next step, porphyrine doped polymer film was deposited onto graphene and the substrate was dissolved and the graphene film was revealed. Polymer film was modified by scanning laser beam and simultaneous me…
L- Histidinium Perchlorate, a semi organic nonlinear optical material was grown by solution growth method. The absorption studies show minimum absorption in the entire visible region. The optical band gap (Eg) value of the grown crystal is obtained from the tauc’s plot of (αhν)2 vs hν which was determined by extrapola…
The environmental and health issues posed by agro wastes have prompted many researchers to look at an alternate use for these materials. The present work looks at using coir fiber and pith as a substituent in cement blocks. Fillers were subjected to chemical treatments and loaded in cement blocks at different loadings…
Pristine ETS-4, a microporous titanosilicate zeotype material was successfully synthesized by using inorganic alkaline-sols as precursors for the first time. Use of halogen/organic free medium, drastic reduction in excess amount of alkali precursors and short synthesis time makes this methodology much more versatile.…
The influence of the temperature on three types of solar cells; polycrystalline, monocrystalline and amorphous silicon, under fixed illumination was measured up to 136oC. The purpose of this study is to investigate the suitability of solar cells to work with thermoelectric generator and heat sink in hybrid system oper…
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