Materials Literature
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We report a rational approach to fabricate graphene nanoribbons (GNRs) with sub-10 nm width by employing chemically synthesized nanowires as the physical protection mask in oxygen plasma etch. Atomic force microscopy study shows that the patterns of the resulted nanoribbons replicate exactly those of mask nanowires so…
Here we systematically examined the effect of nanoparticle size (10-100 nm) and surface chemistry (i.e., poly(ethylene glycol)) on passive targeting of tumors in vivo. We found that the physical and chemical properties of the nanoparticles influenced their pharmacokinetic behavior, which ultimately determined their tu…
Collagen is the most abundant protein in animals. This fibrous, structural protein comprises a right-handed bundle of three parallel, left-handed polyproline II-type helices. Much progress has been made in elucidating the structure of collagen triple helices and the physicochemical basis for their stability. New evide…
In this work, we study simples phosphazenes models, such as R-[R 2 P=N] n -X, with (X = H, F, OH), (R= H, F) and (n = 1, 2 and 3) with an attempt to answer the type of Natural Hybrid Orbital (NHO) able to form this -bond in the phosphazene-Na + complex and the Na + effect on the geometry and the electronic distributio…
This paper reports the examination of the evolution of polyaniline-organic solvent interactions in the temperature range of 294–353 K. For this purpose, rheological and dielectric investigations have been undertaken for dispersions of plast-doped polyaniline in two different solvents (dichloroacetic acid and formic ac…
X-ray micro-tomography (XMT) was used to characterise the pore structure of two open-cell biopolymer foams (starch extrudates). A three-dimensional watershed algorithm was applied to XMT images to segment pore structure. Distributions of pore sizes and interconnecting pore aperture sizes were determined and pore geome…
Abstract A novel thermal stabilizer poly(dioctyltin maleate‐styrene‐methyl acrylate) [P(DOTM‐St‐MA)] was synthesized by radical solution polymerization with benzene as the solvent and 2,2‐azobisisobutyronitrile as the initiator. The structure of terpolymer was characterized by FTIR and 1 H‐NMR spectra, and thermal sta…
The effectiveness of an injectable polymeric formulation, based on poly(sebacic acid-co-ricinoleic acid) and paclitaxel against a heterotopic tumor model was studied. An injectable pasty polymer that releases an incorporated drug over a period of weeks was used. The degradation rate of formulations with paclitaxel was…
For inter-satellite optical communication transmitter with reflective telescope of two-mirrors on axis, a large mount of the transmitted energy will be blocked by central obscuration of the secondary mirror. In this paper, a novel scheme based on diffractive optical element (DOE) is introduced to avoid it. This scheme…
Abstract Acrylonitrile–butadiene–styrene (ABS)/poly(ethylene glycol‐ co ‐cyclohexane‐1,4‐dimethanol terephthalate) (PETG) blends with various ratios at three different processing temperatures were prepared. A significant synergistic enhancement in tensile strength and ductility for a wide range of compositions was ach…
Abstract In this article, a new kind of biodegradable poly(ε‐caprolactone)‐poly(ethylene glycol)‐poly(ε‐caprolactone)‐based polyurethane (PCEC‐U) copolymers were successfully synthesized by melt‐polycondensation method from ε‐caprolactone (ε‐CL), poly(ethylene glycol) (PEG), 1,4‐butanediol (BD), and isophorone diisocy…
We find a giant nonlinear conduction in the charge-ordered organic salt $\ensuremath{\theta}\text{\ensuremath{-}}{(\text{BEDT-TTF})}_{2}\text{RbZn}{(\text{SCN})}_{4}$ in a rapidly cooled state from 34 to 99 K, which cannot be ascribed to a simple Joule heating. The observed voltage-current characteristics are essentia…
Abstract The mechanical properties of poly(1‐butene) reinforced by pristine multiwalled carbon nanotubes (MWNTs) and polypropylene‐grafted MWNTs (PP‐ g ‐MWNTs) were evaluated. The incorporation of pristine MWNTs to PB led to an improvement in stiffness, but not in strength, ductility, and toughness. In comparison, PP‐…
Heterogeneous electron transfer dynamics at molecule−metal or molecule−metal oxide interfaces are a central issue for many fields in surface science. Recent time-resolved two-photon photoemission studies observed electron solvation at protic molecule−metal or −metal oxide interfaces in photoinduced charge transfer pro…
Abstract A series of new aliphatic/aromatic copolyesters [poly(hexylene terephthalate‐ co ‐hexylene adipate) (PHTA)] were synthesized on the bases of 1,6‐hexanediol, adipic acid, and dimethyl terephthalate and characterized by gel permeation chromatography, 1 H‐NMR, wide‐angle X‐ray diffraction (WAXD), differential sc…
The room-temperature phase of the important ferroelectric material barium titanate, BaTiO 3 , was re-investigated by single-crystal X-ray diffraction on a sample grown by the top-seeded solution growth method, with the intention of demonstrating once again that the structure has tetragonal symmetry consistent with the…
We report in this paper a convenient and effective method to identify the structures of superlong well-aligned single-walled carbon nanotubes (SWNTs) via the combination of electrodeposition of Ag particles on the SWNTs with Raman spectroscopy. The suitable density and the visibility of the Ag-deposited long nanotubes…
In this work, the glass transitions of poly(methyl methacrylate) and polystyrene in compressed gaseous acetone/carbon dioxide were measured by an in situ creep compliance method at pressures lower than 7.0 MPa and at 318−338 K. When a small amount of acetone ( x = 0.01−0.02) was added to a polymer-compressed carbon di…
Abstract Polymer/clay nanocomposites (PCNs) of poly(methyl methacrylate) and an organically modified clay, Cloisite 15a, were synthesized in situ with a suspension polymerization technique. The amount of clay present in the PCNs was varied to provide a better understanding of the effect of the clay on the properties o…
Abstract The effects of various parameters on nanocomposite preparation by solution intercalation were studied. Nanocomposites of poly(methyl methacrylate) (PMMA) and commercial organically modified montmorillonites (MMT) were prepared in solvents of different polarities, from strongly polar protic ethanol to nonpolar…