Materials Literature
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On the basis of dilution and pH experiments, in this paper we demonstrated the possible ligand dynamics of aqueous CdTe nanocrystals (NCs) at room temperature. During storage, the excess ligands and cadmium−ligand compounds in solution were preferentially adsorbed on NC surface before they diffused into the ligand she…
Laser power dependent p -aminothiophenol (PATP) adsorption on Au nanoparticles (NPs) has been systematically investigated using surface-enhanced Raman spectroscopy. Molecular junctions (MJs) were found to form between NPs with the quinonoid PATP as the bridge molecule with an external energy provided by the incident l…
Novel SrCO 3 architectures were prepared by a facile aqueous solution route at room temperature using SrCl 2, Na 2 CrO 4, and NaOH as the starting reaction reagents and distilled water as the solvent. The synthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron…
This paper aims to present a review of recent progress made on shape memory polymers (SMPs) and their nanocomposites. Developments in allied fields are also presented in an effort to identify the current and future trends in this area. A new classification of SMP— rubberlike and mesomorphic systems—is suggested. The u…
Abstract Atomic force microscopy (AFM) and transmission electron microscopy (TEM) were used to investigate the fine structure of the calcite prisms from the pearl-oyster shell Pinctada margaritifera . The AFM analysis shows that the prisms are made of densely packed circular micro-domains (in the 0.1 μm range) surroun…
Silver nanoparticles of small size with a high surface to volume ratio have been prepared using an organometallic approach. For this, the complex NBu(4)[Ag(C(6)F(5))(2)] has been treated with AgClO(4) in a 1:1 molar ratio, giving rise to the nanoparticle precursor [Ag(C(6)F(5))] in solution. Addition of one equivalent…
Oxidation of graphite may be carried out by reaction with meta-chloroperoxybenzoic acid to yield graphite epoxide. Scanning tunneling microscopy (STM) showed that the functionalization occurs at the edges rather than on the basal plane of the graphite. Quantification of the epoxide content is possible through the deep…
Abstract Brachiopods are a phylum of shell-forming sessile marine invertebrates which have existed since the early Cambrian. Two very different biomaterial design strategies for their shells evolved early in their history. Both strategies use hybrid fibre composites, however, one is based on mineral fibres embedded in…
Linear Fe(II) 1,2,4-triazole complexes with lipid counteranions are newly developed. These complexes show sharp and reversible spin conversion in toluene, with temperatures significantly higher (by 20-100 K) than the spin crossover temperatures observed in the crystalline states. This is accounted for in terms of incr…
We describe the formation of self-assembling nanoscale fibrillar aggregates from a hybrid system comprising a short polypeptide conjugated to the fluorophore fluorene. The fibrils are typically unbranched, approximately 7 nm in diameter, and many microns in length. A range of techniques are used to demonstrate that th…
In order to understand the relationship between the dielectric properties and the structure of polymer nanocomposites, especially the role of the interface on dielectric response, two polymers with different polarity were used to form nanocomposites with nanoalumina powder, a typical polar inorganic compound. Conseque…
Abstract—A derivation of metamaterial blueprints for the reflectionless (perfectly matched) guiding of electromagnetic waves through waveguide bends is performed. The sensitivity of the response with respect to small perturbations in the associated constitutive tensors is examined. Index Terms—Metamaterials, waveguide…
Low energy electrons (LEE) induce DNA damage by dissociative electron attachment, which involves base release (N-glycosidic bond (N-C) cleavage) and the formation of strand breaks (phosphodiester-sugar bond (C-O) cleavage). The effect of terminal phosphate and base moieties was assessed by exposing DNA model compounds…
The synthesis of vertically aligned carbon nanotubes with submillimeter-order heights was performed using ethanol chemical vapor deposition with Co catalysts supported on Al 2 O 3 substrates. The effects of Al 2 O 3 in the form of amorphous alumina and single-crystalline sapphire were investigated through a characteri…
We have developed a ferroelectric-gate field-effect transistor (FeFET) composed of heteroepitaxially stacked oxide materials. A semiconductor film of ZnO, a ferroelectric film of Pb(Zr,Ti)O 3 (PZT), and a bottom gate electrode of SrRuO 3 (SRO) are grown on a SrTiO 3 (STO) substrate. Structural characterization shows a…
Polyhydroxyalkanoate (PHA) production was achieved using tomato cannery waste coupled with a mixed microbial culture during wastewater treatment. The two-stage PHA production process comprised a sequencing batch reactor (SBR), operating under a periodic feast-famine regime, to accomplish simultaneously wastewater trea…
Abstract Clay minerals impart important chemical properties to soils, in part, by virtue of changes in the redox state of Fe in their crystal structures. Therefore, measurement of Fe(III)/Fe(II) and partitioning of Fe(II) in different reactive sites in clay minerals (during biological and chemical Fe(III) reduction) i…
We report on far infrared magnetotransmission measurements on a thin graphite sample prepared by exfoliation of highly oriented pyrolytic graphite. In a magnetic field, absorption lines exhibiting a blueshift proportional to $\sqrt{B}$ are observed. This is a fingerprint for massless Dirac holes at the $H$ point in bu…
Surface-enhanced Raman scattering (SERS) is shown to give linear and sensitive concentration-dependent detection of folic acid using silver nanoparticles created via ethylene-diaminetetraacetic acid (EDTA) reduction. Optical detection by SERS overcomes the primary limitation of photodissociation encountered during the…
Nanostructured La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCF) oxide powder was synthesized by a facile autocombustion process based on a modified glycine‐nitrate process (GNP) using cellulose fiber as micro‐reactor. As compared with the normal GNP, this novel process allows the combustion to proceed in a much more environme…