Materials Literature
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A highly fluorescent conjugated fluorene polyazomethine that fluoresces in both solution and thin films was prepared. Fluorescence enhancement to near unity was further possible both at low temperature and with protonation.
We report the synthesis and study of two series of amphiphilic block copolymers (BCPs) of which the hydrophilic block is either poly(acrylic acid) (PAA) or poly(N,N-dimethylacrylamide) (PDMA) and the hydrophobic block is a side-chain liquid crystalline polymer (SCLCP) bearing biphenyl mesogens in majority and azobenze…
Randomly packed particles in granular matter, ubiquitous in nature and industry, usually defy simple predictions for the optimal amorphous packing density because jammed granules are strongly correlated. While mixing different granular shapes seems to be a further complication, we discovered in simulations that binary…
To promote solar energy conversion into clean energy, hydrogen fuel and electrical power, photoactive nanostructures, e.g.cadmium sulfide nanotubes and nanocages, have been developed from electronic coupling assembly of nanocrystals. The inter-particle electronic coupling provides the nanostructures with self-narrowed…
In this paper, Gd(2)O(3) : Eu(3+) nanospheres have been encapsulated with nonporous silica and further layer of ordered mesoporous silica through a simple sol-gel process. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N(2) adsorption/desorption, photoluminescence…
Non-mesogenic unit bearing Keggin-type polyoxoanions with tetra-n-octylammonium counterions exhibit an ionic liquid crystalline structure via ionic self-assembly in a certain temperature range.
This paper presents a two-dimensional investigation of the phase diagram for global minimizers to a Cahn–Hilliard functional with long-range interactions. Based upon the $H^{-1}$ gradient flow, we introduce a hybrid numerical method to navigate through the complex energy landscape and access an accurate depiction of t…
Hybrid nanomaterial-based drug delivery systems (HNDDSs) consisting of carbon nanotubes and linear–dendritic copolymers linked to anticancer drugs were synthesized and characterized. Polycitric acid–polyethylene glycol–polycitric acid (PCA–PEG–PCA) linear–dendritic copolymers were used to solubilize and functionalize…
The complete reversal of the ligand field strength of ClO(4)(-) and CF(3)SO(3)(-) in the magnetochemical series is observed in a diiron(III)bisporphyrin. While ClO(4)(-), as the axial ligand, gives a typical high-spin complex, just twisting the conformation of the porphyrin macrocycle gives properties of a pure interm…
A novel class of boron-containing siloxane copolymers (polyborosiloxanes) was synthesized by simple environmentally friendly methods. A boron containing monomer, specifically phenylboronic acid (PBA), and imide forming monomers, specifically aromatic dianhydrides 4,4′-oxydiphthalicanhydride (Oxy) and 1,1,4,4-tetracarb…
Photocurrents of a ruthenium dye-TiO(2) system are enhanced by gold nanoparticles (100 or 40 nm diameter) embedded in TiO(2). As dye-particle spacing decreases to 10 nm, enhancement factor and intensity of localized electric fields at the TiO(2) surface increase. A further decrease in the spacing suppresses the enhanc…
A color-tunable emitter comprising Eu complex-capped ZnSe quantum dot (QD) organic–inorganic hybrid nanocrystals (NCs) was simply synthesized by a hot-injection method, plus the addition of an Eu precursor. Hybrid NCs have the emission of both Eu complexes and ZnSe QDs, and they show bluish white light. In the case of…
The Frozen sorbet (FS) method is applied to the SrO–Al2O3–B2O3 system in order to fabricate glass ceramics consisting of Eu2+,Dy3+-doped SrAl2O4 phosphors, and their luminescent properties are examined. Through the quenching of melts (e.g., 55SrO–27Al2O3–18B2O3 with Eu2O3 and Dy2O3), composites (glass ceramics) consis…
Efficient, low-cost polymer/nanocrystal (NC) hybrid solar cells fabricated from aqueous materials, a PPV precursor and CdTe NCs, were demonstrated. The cells showed an efficiency of 2.14% under AM 1.5 (100 mW cm−2). This work provided a facile and feasible protocol to produce efficient solar cellsvia a cheaper and gre…
Electrically conducting, robust fibres comprised of both an alginate (Alg) biopolymer and a polypyrrole (PPy) component have been produced using reactive wet-spinning. Using this approach polypyrrole–biopolymer fibres were also produced with single-walled carbon nanotubes (CNTs), added to provide additional strength a…
High quality water-soluble photoluminescent (PL) microspheres consisting of CdSe/ZnS quantum dots (QDs) and amphiphilic oligomers (polymaleic acid n-hexadecanol ester) were prepared by a versatile phase transfer method in an emulsion system. Controlled synthesis of different sizes of PL microspheres can be conducted b…
In this paper, we report a novel method for the shape-controlled synthesis of poly(p-phenylenediamine) (PpPD) polymer microstructures using a UV lamp as the oxidation energy source and poly(N-vinylpyrrolidone) (PVP) as the surfactant. By adjusting the synthetic conditions, a series of well-defined and uniform PpPD mic…
Nanostructured radar absorbing materials (RAMs) have received steadily growing interest because of their fascinating properties and various applications compared with the bulk or microsized counterparts. The increased surface area, number of dangling bond atoms and unsaturated co-ordination on surface lead to interfac…
The European Commission Joint Research Centre (JRC) provides scientific support to European Union policy regarding nanotechnology. Over the last three years, the JRC, in collaboration with international public and private partners, focused part of its work on establishing and applying a priority list (NM-Series) of Re…
The field of nanotoxicology recently has emerged out of the need to systematically study the biocompatibility and potential adverse effects of novel nanomaterials. Carbon nanotubes (CNT) are one of the most interesting types of nanomaterials, and recently, their use in applications has dramatically increased. Their po…