Materials Literature
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Highly interconnected poly(acrylamide) (PAM) and poly(vinylimidazolium) (PVIm) porous monoliths were templated by carbon dioxide-in-water (CO2/W) high internal phase emulsions (HIPEs), a toxic-solvent free process. A range of sugar-based fluorinated surfactants prepared by chemoenzymatic synthesis were used as emulsif…
A peptide based two component white light emitting system has been designed and developed on the basis of a co-assembly of a PDI containing peptide system as an acceptor and a stilbene containing peptide system as a donor in organic solvents.
Marine species, such as corals, sea shells and nacres, attract special interest in bioceramics field for bone graft, bone cements and drug delivery applications. Most of the marine structures are made up of pure calcium carbonate (calcite or aragonite) with a very small amount of an organic matrix. In the past the mos…
This review paper proposes the synthesis of nanoparticles from microbes and its applications. Several microorganisms like E. coli, Lactobacillus, Pseudomonas, etc. are involved in the nanoparticles synthesis such as gold, silver, titanium, etc. This is a part of the microbes’ internal metabolism. The microorganism use…
Electrospinning represents an efficient and versatile technique for fabrication of very thin fibers from polymers or composites. Various polymers have been successfully electrospun into ultrafine fibers in recent years mostly in solvent solution and some in melt form. The efficiency of this process can be improved by…
Thin films of Polystyrene (PS) with different concentrations (0, 0.5, 1, 3 and 5 wt. %) of ZnO nanoparticles (ZnO NPs) as a filler were prepared by using solution cast technique. Effect of ZnO NPs on optical properties of PS such as absorbance, transmittance, absorption coefficient, refractive index, extinction coeffi…
The field of scanning thermal probe (SThP) microscopy was born when probes employed in scanning microscopy evolved to measure temperature and/or generate thermal gradients within investigated samples. SThP techniques are currently developed for a wide range of applications including thermal and thermoelectric properti…
We study the influence of UV light on the drainage flows of foams and thin-liquid films stabilized by photoswitchable azobenzene surfactants, whose shape and hydrophobicity can be modified using UV illumination. This model system, the dynamics of which was well characterized in a previous study, enables us to trigger…
A recoverable photo-polymerization catalyst based on an imidazolium and a polyoxometalate, viz., (BMIm)2(DMIm)PW12O40 (where, BMIm = 1-butyl-3-methylimidazolium, DMIm = 3,3'-dimethyl-1,1'-diimidazolium) is reported. It catalyzes photo-polymerization of several industrially important monomers like styrene, methyl metha…
To facilitate the dissociative adsorption of H2 molecules on pristine graphene, the addition of a mono-atom-vacancy to graphene is proposed. This leads to reduction of the dissociative energy barrier for a H2 molecule on graphene from 3.097 to 0.805 eV for the first H2 and 0.869 eV for the second, according to first p…
Uni-directional liquid spreading on asymmetric silicone-fabricated nanostructured surfaces has recently been reported. In this work, uniformly deflected polydimethylsiloxane (PDMS) micro-pillars covered with silver films were fabricated. Asymmetric liquid wetting and spreading behaviors in a preferential direction wer…
Like many biomaterials, spider silk responds to water through softening and swelling. Major ampullate silk, the main structural element of most prey capture webs, also shrinks dramatically if unrestrained or develops high tension if restrained, a phenomenon called 'supercontraction'. While supercontraction has been in…
Large-scale Sn and/or S doped Cu3Sb1−xSnxSe4−ySy (x = 0.02, 0.04, 0.06 and 0.10; y = 0, 0.5) nanoparticles were first prepared through a low-temperature co-precipitation route. The effects of Sn doping on the thermoelectric properties of the Cu3SbSe4-based materials were explored. Due to the improved power factor from…
Decoration of tetrelchalcogenide T-E clusters with chelating donor ligands was achieved to capture transition metal ions on their surfaces. We demonstrate that by covalent linking of bispyridyl ligands to an Sn-S complex, [ZnX](+) units can be trapped and incorporated into the cluster framework. Intermediates that wer…
Here, we report the cation vacancy-induced room-temperature ferromagnetism (RTFM), photoluminescence (PL) and electrical properties of different group-IA alkali-metal (Li, Na, K)-doped ZnO thin films fabricated by pulse laser deposition. The experimental evidence indicates that the Zn vacancies are responsible for the…
A new type of organic-inorganic hybrid supramolecular polymer has been prepared by using the base group modified polyoxometalate clusters as monomers, where the hydrogen bonds between the complementary base pairs act as the driving force.
We report a competition assay using our recently reported dye Mallard Blue, which allows us to identify synthetic heparin binders in competitive media, including human serum - using this we gain insight into the ability of PAMAM dendrimers to bind heparin, with the interesting result that low-generation G2-PAMAM is th…
Applying density functional theory (DFT) calculations, we have designed fullerenes (C20, C24, C26, C28, C30, C36, C60 and C70) intercalated phthalocyanine covalent organic frameworks (Cn-Pc-PBBA COFs). First principles molecular dynamics (MD) simulations showed that the structures of Cn-Pc-PBBA COFs are stable at room…
Tubules formed by self-assembly of organic molecules have vast potential for nanotechnology applications, and the introduction of sensitivity to stimuli into self-assembly tubules represents a particularly attractive feature. Here we report the preparation and characterization of a molecule obtained by chemical modifi…
Electrodes composed of ultrathin MnO2 (thickness 5–80 nm) spines on Au nanowire (NW) stems (length 10–20 μm, diameter 20–100 nm) were electrochemically grown on flexible polyethylene terephthalate (PET) substrates. The electrodes demonstrated high specific capacitance, high specific energy value, high specific power v…