Materials Literature
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Block copolymers (BCP) are self-assembling polymeric materials that have been extensively investigated for several decades. Recently, directed self-assembly (DSA) of BCPs has received enormous research attention from both academia and industry as next-generation nanolithography technology. This article provides a brie…
We report the piezoelectric properties of ZnO nanowires (NWs) obtained by using a nanoindenter with a conductive boron-doped diamond tip. The direct piezoelectric effect was measured by performing nanoindentations under load control, and the generated piezoelectric voltage was characterized as a function of the applie…
We have performed density-functional-theory calculations to study the electronic and magnetic properties of edge-hydrogenated and edge-doped zigzag silicene nanoribbons (ZSiNRs). The formation energies of monohydrogenated and dihydrogenated edges slightly depend on the width of ZSiNRs, whereas the electronic and magne…
We report that the upconversion white-light luminescence in ultrasmall CaF2:Yb/Tm/Ho nanoparticles has been enhanced by more than one order of magnitude through growing the Yb3+-containing NaYF4 shell. Such white-light enhancement achieved in the ultrasmall (sub-10 nm) core–shell nanocrystals is attributed to the surf…
Plant mediated green synthesis of different metallic nanoparticles has emerged as one of the options for implementation of green chemistry principles, and successfully made an important contribution towards green nanotechnology. However, beyond the synthesis and application aspects, the science of green synthesis has…
Graphene/Bi 2 Te 3 thermoelectric materials were prepared by spark plasma sintering (SPS) using hydrothermal synthesis of the powders as starting materials. The X‐ray diffraction (XRD) and field emission scanning electron microscope (FE‐SEM) were used to investigate the phase composition and microstructure of the as‐p…
Thin surface layers on fine particles were found to substantially change their functionalities and properties, such as chemical reactivity, thermal stability, catalytic activity, dispersibility, or optical, magnetic and electronic properties. Because of that, the core/shell nanostructures have opened up research oppor…
A catalytic hydrogel is reported for the substrate selective direct aldol reaction of aliphatic ketones based on their hydrophobicity and on the emergence of catalytic activity only after self-assembly of the catalyst.
Two novel B-π-N based conjugated porous polymers have been successfully synthesized. The full characterization revealed their unique structures, both consisting of alternating π-bridged donor and acceptor subunits. They exhibited high chemical and thermal stabilities, with a weight loss of only 5% at 455 °C and 362 °C…
Emission of a luminogen could be switched among three colors in the solid state by transformation among three different aggregation states. The partly amorphous solid of the luminogen exhibits excitation dependent emission due to the contribution of both amorphous and crystalline parts to the photoluminescence intensi…
Silver nanoparticles (AgNPs) decorated filter papers combining solid-phase extraction (SPE) with surface enhanced Raman spectroscopy (SERS) achieved rapid collection of analytes and in situ detection. The AgNPs were fabricated by cellulose self-sacrificing reduction. Aqueous Ag(NH3)2OH was reduced by hydroxyl groups i…
“Small” carbon nano-onions (CNOs) are spherical, ca. 5 nm in diameter, concentric shells of graphitic carbon that can be also described as multi-shelled fullerenes. Given the easy functionalization and high thermal stability of the CNOs produced from nanodiamond, they are the most obvious choice for studying the poten…
Using a recently developed 'Crystal structure AnaLYsis by Particle Swarm Optimization' (CALYPSO) algorithm on a structural search, we predicted a novel sp(3) carbon allotrope possessing an orthorhombic lattice with the space group Cmmm (oC32). The calculated elastic constants and the simulated hardness revealed that o…
Thermoelectric materials have attracted much attention due to the current interest in energy conversion and recent advancements in nano-engineering. A simple approach to synthesize BiTe and Bi2Te3 micro/nanowires was developed by combining solution chemistry reactions and catalyst-free vapor-solid growth. A pathway to…
The intentional introduction of transition metal impurities into semiconductor nanocrystals is an attractive approach for tuning quantum dot photoluminescence emission. Particularly, doping of ZnS quantum dots with Mn(2+) (Mn:ZnS QDs) results in a phosphorescence-type emission, attributed to the incorporation of manga…
AIM: To facilitate engineering of suitable biomaterials to meet the challenges associated with myocardial infarction. METHODS: Poly (glycerol sebacate)/collagen (PGS/collagen) core/shell fibers were fabricated by core/shell electrospinning technique, with core as PGS and shell as collagen polymer; and the scaffolds we…
We studied the effect of annealing temperature on the physical properties of WO 3 thin films using different experimental techniques. WO 3 has been prepared by hot-filament metal oxide deposition (HFMOD). The films, chemical stoichiometry was determined by X-ray photoelectron spectroscopy (XPS). The monoclinic single-…
The deposition of crystalline CuWO4 and WO3 layers on copper oxide nanowire arrays resulted in a five-fold improvement of the photocurrent density (∼1.7 mA cm−2 at −0.1 V vs. RHE) over titania-coated copper oxide NW arrays. The deposition of WO3 or CuWO4 reduced the CuO phase impurities in Cu2O. The improvement in the…
Novel anti-corrosive coatings were prepared by replicating the fresh leaves of Xanthosoma sagittifolium, a species of tropical flowering plant. These coatings have the synergistic effect of superhydrophobicity and gas barrier properties. The superhydrophobic epoxy/organophilic clay (SEC) coating, prepared by a 3D-biop…
A nanofibrous matrix system (NFMS), consisting of a drug‐loaded nanofiber layer, was electrospun directly onto a polymeric backing film, the latter of which was formulated and optimized according to a 3‐level, 3‐factor Box‐Behnken experimental design. The dependent variables, fill volume, hydroxypropylmethylcellulose…