Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTOxidation−Migration Cycle in Polypropylene-Based NanocompositesMenachem Lewin and Yong TangView Author Information Polymer Research Institute, Department of Chemical and Biological Sciences, Polytechnic University, 6 Metrotech Cente…
As a practical concept of regenerative medicine, we have focused on in vivo tissue engineering utilizing the foreign body reaction. Plastic substrates for valvular leaflet organization, consisting of two pieces assembled with a small aperture were inserted into a microporous polyurethane conduit scaffold. The assembly…
The authors report two methods to determine electromagnetic and chemical enhancement factors in surface-enhanced Raman scattering (SERS), which are based on saturation property and decay dynamics of photoluminescence and concurrent measurements of photoluminescence and resonance Raman scattering intensities. Considera…
We report the displacive and order–disorder characters of PbTiO 3 analyzed using a classical atomic model which was developed under the inverse relation between the bond length and the bond valence. The ferroelectric phase changes to the paraelectric phase around 700 K, and the histograms of Ti–O and Pb–O bond lengths…
Octahedral-like NiFe2O4 ferrite nanocrystals were synthesized using EDTA-assisted hydrothermal method under mild conditions. XRD and FTIR analysis were used for composition and structure investigation. XRD analysis revealed a pure ferrite phase with high crystallinity. Morphological investigation by SEM showed octahed…
Bis(5-methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarbonitrilyl)acetylene, a derivative of the highly polymorphic compound 5-methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarbonitrile (ROY) that possesses two chromophores electronically coupled through a triple bond, was found to be trimorphic. Structural data for two of…
Excited-state properties of the croconate dyes were investigated with an aim to utilize them as light harvesting assemblies in the infrared (IR) region (λ max ∼ 865 nm and M −1 c −1 = (1.4−4.2) × 10 5 M −1 s −1 ). The excited singlet of the monomeric dye quickly deactivates (lifetime 4−7 ps) without undergoing intersy…
A one-step template-free process for the fabrication of pure, doped, and codoped single-crystal MgBO 2 (OH) nanobelts in high yield has been presented. The growth mechanism of such novel nanobelts has been investigated on the basis of time-dependent experiments and the crystal structure of szaibelyite MgBO 2 (OH). Upo…
This paper describes a study of the generation and flow of photocurrent through junctions containing three-dimensional arrays of colloidal CdSe quantum dots (QDs) of either a single size or multiple sizes. The electrodes were indium tin oxide (ITO) covered with a thin layer of poly(3,4-ethylenedioxy-thiophene):poly(st…
Nephrogenic systemic fibrosis (NSF) describes a characteristic fibrosing disorder which typically presents with indurated plaques on the trunk and extremities of patients with advanced renal disease. We present a case of biopsy-confirmed NSF in a patient with severe acute kidney injury with no prior history of renal d…
This paper describes the electrical characteristics of junctions composed of three-dimensional arrays of colloidal CdSe quantum dots (QDs) with tin-doped indium oxide (ITO)/poly(3,4-ethylenedioxy-thiophene):poly(styrenesulfonate) (PEDOT:PSS) and eutectic Ga-In (EGaIn) electrodes. It focuses on a comparison of junction…
Deformation of several linear glassy polymers such as: a-PS, a-PMMA, a-PET, PC and epoxy-aromatic amine networks was investigated by deformation calorimetry, DSC, IR-Fourier spectroscopy and irreversible deformation recovery at heating. All polymers deformed in the glassy state have shown number of common features. In…
We report electrohydrodynamic instability in a cholesteric liquid crystal—a mixture of p-methoxy benzylidene p-n-butylaniline (MBBA) and a cholesteric dopant cholesteryl nonanoate (CN), in the presence of a superimposed magnetic field H. We have found a certain intensity H* with respect to the instability in this mixt…
The study of the crystalline xerogel formed by a newly synthesized l -valine and pyridine containing low-molecular-weight gelator reveals a polymorphic transition above 225 °C that is followed by the formation of microfibers. The habitus of the fibers grown remains stable upon cooling. Microscopic observations lead to…
Various aspects of crystallographic quantitative texture analysis (QTA) are introduced and the additional information that combined analysis (CA) can yield for the full characterization of real materials (textured, stressed, nanosized, layered etc.) is described. QTA is frequently used because the existence of texture…
The ferroelectric material lead zirconate titanate (PZT) has traditionally been considered incompatible with base metal technology because PbO volatility makes conventional thermodynamic equilibrium processing impractical. However, by strategically designing solution chemistry and processing conditions to avoid interf…
The studies of the gel-to-sol phase transition by the Raman, FT-IR, and 1H NMR methods of the gel made by low molecular weight organogelator 1,2-O-(1-ethylpropylidene)-alpha-D-glucofuranose with toluene as the solvent are reported. The FT-IR spectra revealed the existence of a hydrogen bond network formed by gelator m…
Nano-crystalline Si/SiO 2 multilayers were prepared by alternately changing the ultra-thin amorphous Si film deposition and the in situ plasma oxidation process followed by the post-annealing treatments. Well-defined periodic structures can be achieved with 2.5 nm thick SiO 2 sublayers. It is shown that the size of fo…
The first and second generation neutral, water-soluble dendronized polymethacrylates PG1 and PG2, respectively, carrying hydroxyl groups in the periphery are reported. The threefold branched repeating unit of the dendrons are synthesized on the multigram scale using gallic acid as the branching point and tri(oxyethyle…
Nondegradable synthetic polymer vascular grafts used in cardiovascular surgery have shown serious shortcomings, including thrombosis, calcification, infection, and lack of growth potential. Tissue engineering of vascular grafts with autologous stem cells and biodegradable polymeric materials could solve these problems…