Materials Literature
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We study the interplay between lateral confinement and photon-induced processes on the electronic properties of illuminated graphene nanoribbons. We find that by tuning the device setup (edges geometries, ribbon width, and polarization direction), a laser with frequency Ω may either not affect the electronic structure…
The energetics and assembly pathways of small clusters may yield insights into processes occurring at the earliest stages of nucleation. We use a model system consisting of micrometer-sized, spherical colloidal particles to study the structure and dynamics of small clusters, where the number of particles is small (N ≤…
Singlet open-shell character of polyperiacenes has been elucidated by theoretical analysis based on the Clar's aromatic sextet valence bond model and quantum chemical calculations. Anti-ferromagnetic ground state of large polyperiacenes was relevant to the sufficient stabilization energy derived from aromatic sextet f…
For the first time, stable aqueous dispersions of graphene sheets can be prepared via exfoliation/in situ reduction of graphene oxide in the presence of binol salt, a stabilizing surfactant that can be completely removed without affecting the properties of graphene sheets.
Flavonoids, such as quercetin, have been reported to exhibit a wide range of biological activities related to their antioxidant capacity. The aim of this study was to investigate the protective effect of quercetin on cell adhesion, and the viability and proliferation of KB epithelial cells. Quercetin‐ (1, 5 wt%)‐conta…
A novel low weight molecular gelator was designed and synthesized which can gelate several polar solvents with different morphologies. It is interesting that it exchanges morphology between a three-dimensional gel network and vesicles in ethanol via treatment with ultrasound and a heating-cooling process, through supr…
Many DFT studies of O(2) dissociation on Pt(111) give conflicting information on preferred paths and final states. Here we report large p(4 × 4) unit cell minimum energy pathway evaluations and compare O(2) adsorption and dissociated states on Pt(111). Calculations reveal how the pathways for O(2) dissociation startin…
PURPOSE: This study was performed to compare the cytotoxicity and magnetic resonance (MR) contrast in diverse cultured cells and xenograft tumors models of two ultra-small superparamagnetic iron oxides (USPIOs), thermally cross-linked superparamagnetic iron oxide nanoparticles (TCL-SPION) and monocrystalline iron oxid…
Many two-photon absorption (TPA) organic dyes are water insoluble and suffer from strong fluorescence quenching in aqueous media due to the self-aggregation effect. This seriously limits their applications as two-photon fluorescence (TPF) probes in bio-imaging. By employing a reprecipitation method, we prepared ultrab…
This work reports on the infrared-to-visible CW frequency upconversion from planar waveguides based on Er3+–Yb3+-doped 100–xSiO2–xTa2O5 obtained by a sol–gel process and deposited onto a SiO2–Si substrate by dip-coating. Surface morphology and optical parameters of the planar waveguides were analyzed by atomic force m…
In the present work, the preparation of a new organic-inorganic hybrid material in which tetrakis(p-aminophenylporphyrin) is covalently linked to a Lindqvist structure of polyoxometalate, is reported. This new porphyrin-polyoxometalate hybrid material was characterized by (1)H NMR, FT-IR and UV-Vis spectroscopic metho…
This paper reports the fabrication of Zinc Oxide (ZnO) based quantum dot sensitized solar cell using Cadmium Sulphide (CdS) quantum dots (QDs) capped by poly vinyl alcohol (PVA). Chemical route was used to synthesize ZnO nanoparticles (NPs) as well as CdS QDs. The crystallite size of ZnO NPs was obtained to be 28 nm a…
We present a general hydrothermal method without any organic solvent or surfactant for the synthesis of YBO3:Eu3+ nano- and micro-structures. The samples were of excellent quality with uniform, well dispersed, self-assembled and self-purified YBO3:Eu3+. Single crystal nanoflakes gathered together to evolve into a hier…
Continued reduction in resistance-capacitance (RC) delays in nano-electronic Cu interconnect structures will require new materials with increasingly lower dielectric constants (i.e. low-k). Significant reductions in RC delay can be achieved by reducing the dielectric constant of the relatively high dielectric constant…
The past decade has seen a growing need for robust organic coating technologies in various fields going from biotechnology, sensing and electronic devices to membrane design. Polyelectrolyte multilayers constitute a major and versatile tool in this respect. Yet, these films usually suffer from chemical and mechanical…
Highly luminescent and low toxic glutathione-capped CdSeTe@ZnS-SiO(2) quantum dots were successfully synthesized via a promising microwave strategy, and then applied in the detection of Cu(2+).
A commercial glycerol-modified 19 nm silica sol has been homogenised with sunflower oil to form stable Pickering emulsions and also covalently cross-linked colloidosomes. Colloidal core–shell polymer/silica nanocomposite particles produced using this glycerol-functionalised silica were also used to produce both Picker…
Shear-based film casting methods were used to cast neat films from wood-based cellulose nanocrystal (CNC) suspensions. The degree of CNC alignment in dried films was characterized using the Hermans order parameter (S), and the film elastic modulus (E), ultimate tensile strength (s f), elongation at failure (e f), and…
Hard surface layers of polymer materials, especially polypropylene, can be formed by chemical or physical process. One of the physical methods modifying the surface layer is radiation cross-linking. Radiation doses used were 0, 30, 45, 60 and 90 kGy for unfilled polypropylene with the 5 % cross-linking agent (triallyl…
A new dimer polyoxoniobate [Cu(en)(2)](11)K(4)Na(2)[KNb(24)O(72)H(9)](2)·120H(2)O (1) has been synthesized and systematically characterized. Visible light photocatalytic H(2) evolution activity was researched with 1 as the visible-light photosensitizer and catalyst, cobaloximes [Co(III)(dmgH)(2)pyCl] as the co-catalys…