Materials Literature
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Indium oxides such as In2O3 based thermoelectric ceramics exhibit a figure of merit ZT ~0.5 above 1000 K, while optimized ZnO based thermoelectrics may reach ZT ~0.3 at 1273 K. A way to further optimize the thermoelectric performance is to tune the thermal conductivity. In this work, a reduction of the thermal conduct…
The main purpose of the present paper is to emphasize the non-invasive effect of some new prepared nanomaterials on skin diseases (psoriasis) together with the procedures to obtain them. These new materials are based on gold nanoparticles and natural compounds extracted from native plants of the Adoxaceae family (Euro…
This work reports conjugation of two mono carboxy substituted zinc phthalocyanines with glutathione capped silver nanoparticles (GSH-AgNPs). The photophysicochemical behaviour of the novel phthalocyanines–silver nanoparticle conjugates was investigated together with simple mixtures of the silver nanoparticles with low…
Iron molybdate catalysts are used for the selective oxidation of methanol to formaldehyde. In this paper we have attempted to understand what determines high selectivity in this reaction system by doping haematite with surface layers of Mo by incipient wetness impregnation. This works well and the Mo appears to form f…
A novel one-dimensional (1D) organic–inorganic hybrid oxalate-bridging Cu–Tb heterometallic phosphotungstate [Cu(en)2(H2O)][Cu(en)2][Tb(α-PW11O39)(H2O)2(ox)Cu(en)]·6H2O (1) with mixed organic ligands of ox and en (ox = oxalate, en = ethylenediamine) has been hydrothermally synthesized. Notably, it represents the first…
Novel ruthenium complexes [Ru(L(1))(NO)Cl2] (1), [Ru(L(2))(PPh3)Cl2] (2), [Ru(L(2))(PPh3)(NO2)Cl] (3) and [Ru(L(2))(PPh3)(NO)Cl](ClO4)2 (4) (where L(1)H = N'-phenyl-N'-(pyridin-2-yl)picolinohydrazide and L(2) = (1-phenyl-1-(pyridin-2-yl)-2-(pyridin-2-ylmethylene)hydrazine) were synthesized. These complexes were charac…
We herein report the first instance of using pristine C70 as a heavy-atom free organic sensitizer for efficient triplet-triplet annihilation upconversion (UC) for both green-to-blue and red-to-green UC using 9,10-bis(phenylethynyl)anthracene and perylene as acceptors, respectively. C70 achieved quantum yields of 8% an…
Nanostructured cadmium oxide (CdO) films were fabricated on glass substrates from alkaline baths containing saccharin as an additive by a successive ionic layer adsorption and reaction (SILAR) method. The effects of saccharin concentration in the bath on the structural, morphological, and optical properties were studi…
We report the molecular engineering of asymmetrically functionalized naphthalene diimide (NDI) with a simple amino acid into robust self-assembled free-standing, green-fluorescent and conducting layered hierarchical 2D nanosheets which exhibit chiral and crystalline molecular packing. Remarkably the NDI–amino acid con…
A new organic-inorganic nanohybrid based on zinc-layered hydroxide intercalated with an anti-inflammatory agent was synthesized through direct reaction of salicylic acid at various concentrations with commercially available zinc oxide. The basal spacing of the pure phase nanohybrid was 15.73 Å, with the salicylate ani…
Synthetic membranes have gained an important place in chemical technology and are used in a broad range of applications. UV irradiation is an age old process used for disinfection as well as for sterilization purposes. It is used for sterilizing equipment in which polysulfone (PSf) membranes are used. As a result, sho…
Establishing an appropriate degradation rate is critical for tissue engineering scaffolds. In this study, the degradation rate of silk fibroin three-dimensional scaffolds was regulated by changing the molecular weight (MW) of the silk fibroin. The solubility of silk fibroin depends primarily on the ionic ability of th…
The dehydrogenation of primary and secondary amine-boranes (RNH(2)·BH(3) and R(2)NH·BH(3); R = alkyl groups) was studied using the bulky N-heterocyclic carbene IPr (IPr = [(HCNDipp)C:]; Dipp = 2,6-(i)Pr(2)C(6)H(3)) as a stoichiometric dehydrogenation agent. In the case of primary amine-boranes, carbene-bound adducts I…
Multifunctional nanocomposites integrating mesoporous and luminescence properties into a single entity are synthesized via a facile and effective approach. Oleic acid capped β-NaYF4:Ce(3+)/Tb(3+) nanoparticles (NPs) are transferred into aqueous solution by cetyltrimethylammonium bromide (CTAB) surfactants, and further…
Biogenic ceramics are known to exhibit superior toughness due to a laminated architecture with ultrathin organic layers separating the ceramic blocks. Theoretical analyses relate the toughness increase to the modulus contrast, Ec/Eo between the stiff, Ec, and the compliant, Eo, components. However, experimental data o…
Spherulites of microcrystalline cellulose (MCC) have been prepared by using the vapor precipitation procedure with proper humidity at various temperatures from concentrated microcrystalline cellulose/1-allyl-3-methylimidazolium chloride (MCC/AMIMCl) solutions, for which AMIMCl is an ionic liquid, a good solvent for di…
The reactivity of sp(2) carbon materials is studied using the adsorption and dissociation of O2 on graphene and graphene oxide as model systems. The reactions on the basal plane, zigzag and armchair edges of graphene and graphene oxide with different oxygen-containing groups are calculated using first principles calcu…
By introduction of ‘appropriate’ steric hindrance into 2-(2′-hydroxyphenyl)benzimidazole, the obtained compound forms polymorphic crystals based on either intramolecular or intermolecular hydrogen bonding, which respectively show strong ESIPT luminescence (ON state; Φ = 0.74) and practically no luminescence (OFF state…
An organic nonlinear optical single crystal of ninhydrin was grown by Sankaranarayanan–Ramasamy (SR) method by using specially designed glass ampoule. The good quality seed crystal has been prepared by conventional solution growth technique using double distilled water as the solvent. The lattice dimension of the grow…
Abstract Highly photochemically stable nanoparticles, in which upconversion luminescence can be excited – so-called upconversion nanocrystals (UC-NCs) – exhibit widely separated (up to 500 nm) narrow luminescence bands in the visible (VIS) region located far from the excitation near-infrared (NIR) laser radiation, and…