Materials Literature
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The synthesis and mesomorphic properties of novel homologous series are reported. All 11 members of the series, except the methoxy and ethoxy derivatives, are enantiotropically mesogenic. The propoxy to tetradecyloxy homologues exhibits smectognic amd nematogenic behavior, while the hexadecyloxy homologue shows only n…
An organic/inorganic nanohybrid, based on tetra-anionic mesotetrakis-(4-sulfonatophenyl)porphyrin (TPPS) and a positively charged polyhedral oligomeric silsesquioxane (POSS), has been synthesized and fully characterized. Differential scanning calorimetry and thermogravimetric analyses have allowed classification of th…
Atom transfer radical addition (ATRA) and polymerisation (ATRP) reactions are commonly catalyzed by copper(I) complexes which react, reversibly, with a dormant alkyl halide initiator (RX) releasing a reactive organic radical R˙. The copper catalyst bears a multidentate N-donor ligand (L) and the active catalyst is sim…
The synthesis of single chain nanoparticles has been achieved by the synthesis of a linear polystyrenic precursor carrying 3,4-propylenedioxythiophene groups via atom transfer radical polymerization followed by intramolecular crosslinking via oxidative polymerization. This methodology enabled the introduction of elect…
Measurements of birefringence (Δn), dielectric permittivity (ε‖, ε⊥), elastic moduli (K11, K33) and rotational viscosity (γ1) have been carried out on the nematic (N) phase of a few hockey stick-shaped compounds 4-(3-n-alkyloxy-2-methyl-phenyliminomethyl)phenyl 4-n-alkyloxycinnamates with a lateral methyl group insert…
Thermosensetive poly(N-isopropylacrylamide)-based magnetic nanoparticles were synthesized by free radical polymerization of N-isopropylacrylamide (NIPPAMs), methacrylic acid (MAA), and vinyl pyrrolidone (VP) in the presence of methylene-bis-acrylamide as cross linking agent. The Fe3O4 magnetic nanoparticls were prepar…
Hydrogenated diamond–like carbon (DLC) containing Si films were synthesised using the radio frequency plasma enhanced chemical vapour deposition. The results show that all Si–doped DLC films exhibited a similar amorphous structure as non–doped DLC films. Doping Si caused graphitisation of C and reduced the surface har…
Cerium containing mixed oxides derived from hydrotalcites was prepared and its catalytic activity was studied for oxidative dehydrogenation of ethyl benzene to styrene. Structural, spectroscopic and morphological features of the catalyst have been thoroughly examined with various physico-chemical characterization meth…
A new process for directed block co-polymer self-assembly (DSA),AZ(R) SMARTTM, for high resolution line and space patterning was introduced. The SMART process started with photoresist trench patterns generated through common photolithographic processes on top of a thin crosslinked neutral layer. A reactive ion etching…
For centuries now, antioxidants have been known to provide better health by neutralizing the free radicals which are continuously produced in the human body. In normal circumstances, self-antioxidant defense system of the human body is capable of quantitatively managing the free radicals. However, in certain cases, wh…
A silicon(IV) phthalocyanine with two axial p-phenylene-linked boron dipyrromethene and monostyryl boron dipyrromethene moieties has been prepared. The resulting pentad absorbs strongly in most of the UV-visible region and serves as an artificial photosynthetic antenna-reaction centre model.
The electrochemical impedance spectroscopy, the cyclic voltammetry, and the constant power charge/discharge methods have been applied to establish the electrochemical characteristics for the electrical double–layer capacitor consisting of the 1 M (C2H5)3CH3NBF4 electrolyte in acetonitrile. The microporous carbon elect…
Water soluble carbon nanotubes (wsCNTs) with network structure possessing multipodal junctions were isolated by the oxidative treatment of carbon soot (generally discarded as waste during fullerene synthesis) using dilute nitric acid as black crystalline solid. wsCNTs having multipodal junctions are highly soluble in…
Mesoporous LaNiO3 (LNO)/NiO electrodes for thin film supercapacitors have been developed from a sol–gel precursor using polyethylene glycol 1000 (PEG 1000) as a template. It is the first time that the LNO/NiO thin films have been reported as electrochemical electrodes. Electrochemical measurements in an aqueous electr…
Increasing demand for energy requirement has attracted considerable attention among researchers to develop efficient energy storage device. Among energy storage devices, electrochemical capacitor (EC) has great potential for its capability to deliver more power than batteries and store more energy than conventional ca…
The elastic and optical properties of a bent-core thiadiazole nematic liquid crystal are reported. The system exhibits unusually large values of birefringence (∼0.4), which can be partly attributed to significant conjugation in the molecular structure. It is found that the splay (K11), twist (K22) and bend (K33) elast…
A novel surface modification strategy for an electrospun nanofibrous film was reported, allowing detection and removal of copper ions in the aqueous solution. This reusable dual fluorescent-colorimetric nanofibrous film can be utilized conveniently to achieve real-time naked-eye sensing in aqueous medium just like usi…
Abstract—The asymmetric transmission of the linearly polarized waves at normal incidence through the lossy anisotropic chiral structure is demonstrated. The proposed chiral metamaterial structure is composed of bi-layered discontinuous cross-wire-strips, and it is utilized in order to realize polarization rotation. Fi…
A bis(permethylated β-cyclodextrin)-substituted aza-BODIPY has been prepared, which forms stable 1 : 1 host-guest complexes with metal-free and zinc(II) tetrasulfonated porphyrins in water. The resulting complexes exhibit predominantly a photoinduced energy or electron transfer process depending on the porphyrin-based…
The control of surface properties such as the morphology, roughness, stiffness, and wettability of polyelectrolyte multilayers was carried out using poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid, 1 : 1 SS : MA) sodium salt (PSSMA 1 : 1) as the building blocks via adjus…