Materials Literature
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Aqueous polyaniline (PANI) nanodispersions doped with dodecylbenzenesulfonic acid (DBSA) were synthesized and successfully inkjet-printed using a piezoelectric desktop printer. This paper examines the optimization and characterization of the nanoparticulate formulation for optimal film electrochemistry and stability.…
The ability to manipulate and control the surface properties of nylons is of crucial importance to their widespread applications. In this work, surface-initiated atom-transfer radical polymerization (ATRP) is employed to tailor the functionality of the nylon membrane and pore surfaces in a well-controlled manner. A si…
Electrospinning is one of the simplest techniques for obtaining polymer nano fibers. Nanofibers have large surface area to volume ratio and hence have excellent application potential in sensors, filter design etc. Polyaniline (PANI) is the well-known and widely studied conducting polymer, which however, is insoluble i…
Nanofiber technology (fiber diameter less than 1 micrometer) is under development for future Army lightweight protective clothing systems. Nanofiber applications for ballistic and chemical/biological protection are being actively investigated, but the thermal properties of nanofibers and their potential protection aga…
An automated multiple-beam Fizeau fringes in transmission technique was used with a fiber-drawing device to detect necking deformation along polypropylene (PP) fibers axis under different conditions of annealing process. The refractive indices, refractive index profiles and crystallinity were calculated along the anne…
Due primarily to cell sourcing issues, many in the field of tissue engineering have opted to create scaffolds that promote in situ regeneration, using the body as both the bioreactor and the cell source for the remodeling of scaffolds, resulting in the formation of native tissue. This practice raises many concerns, wi…
We have carried out O K- and Co L2,3-edge x-ray absorption studies on misfit-layered oxides of polycrystalline Ca3Co4−xFexO9+δ (x=0,0.05,0.1,0.15). The analyses of integrated absorption intensity show that the number of Co 3d unoccupied states decreases upon partial substitution of Fe for Co, which correlates well the…
In this article, a broadband, volumetric, negative-refractive-index metamaterial is presented and its operation is explained. The structure achieves a negative permeability bandwidth of 60% using a periodic cage of backward-wave transmission lines. The permeability is negative over a broad bandwidth due to contradirec…
Dosed on rutile TiO 2 (110) at 100 K, the thermal chemistry of 2-propanol in three forms C 3 H 7 OH, C 3 D 7 OD, and C 3 H 7 OD was characterized using temperature-programmed desorption. Only 2-propanol, propene, and water desorb with no evidence for acetone. The propene forms and desorbs by two paths, a heretofore un…
By the invention of foam processing techniques using physical blowing agents, the area of foam injection molding has caught the attention of product developers in industry as well as of researchers. Compared to conventional injection molding, the foaming approach delivers a great potential in the manufacturing as well…
The utility of cuticular autofluorescence for the visualization of copepod morphology by means of confocal laser scanning microscopy (CLSM) was examined. Resulting maximum intensity projections give very accurate information on morphology and show even diminutive structures such as small setae in detail. Furthermore,…
Proteases are important biomarkers for many biological processes and are popular targets for therapeutics investigations. A protease can be detected by monitoring changes in the paramagnetic chemical exchange saturation transfer (PARACEST) effect of a MRI contrast agent that serves as a substrate for the protease. To…
Lipid-based nanocarriers have proven successful in the delivery of mainly chemotherapeutic agents, and currently they are being applied clinically in the treatment of various types of cancer. These drug delivery systems achieve increased therapeutic efficacy by altering the pharmacokinetics and biodistribution of enca…
Research Article| July 01, 2007 Liquid Immiscibility in Silicate Melts and Related Systems Alan B. Thompson; Alan B. Thompson Dept. Erdwissenschaften, ETH Zürich, Institute for Mineralogy & Petrology,Clausiusstrasse 25, Zürich, CH-8092, Switzerland *also at Faculty of,.Mathematics and natural Sciences, University of…
We present computer simulations on the super-paramagnetic blocking phenomena in wide band-gap dilute magnetic semiconductors (DMSs) in particular (Ga, Mn)N. It is shown that due to the formation of magnetic nano-clusters of magnetic impurities under the spinodal decomposition, super-paramagnetic blocking temperature (…
Abstract This review article introduces various aspects of dynamic vulcanization as applied to thermoplastic elastomers (TPEs). The classification of polymer blends and TPEs, the development of thermoplastic vulcanizates (TPVs), and the application of different types of crosslinking systems with special emphasis on pe…
This synthesis documents the results of a comprehensive review of worldwide information dealing with the following issues as related to warm-mix asphalt (WMA) technology: (1) current state of the art/practice of WMA, (2) benefits and costs of WMA technology, (3) plant modifications to accommodate certain WMA processes…
In this current investigation psyllium has been functionalized with acrylamide in the presence of potassium persulphate (KPS)-hexamethylene tetramine (HMTA) as an initiator-crosslinker system. After the initial optimization of different reaction parameters the resultant hydrogel was used for the absorption of water fr…
Based on a previous optimisation of set-up parameters for injection moulding of polyamide 6-6 (PA 6-6) reinforced with 40-wt% of 10 mm long glass fibre, the aim of this paper is to define suitable guidelines to further improve the mechanical performances of PA 6-6/glass long fibre thermoplastic (LFT) injection mouldin…
Abstract Degradation of rubber vulcanizates in the presence and absence of air as well as in presence of ozone is reviewed in this paper. The paper also outlines the means to overcome this undesirable phenomenon. Under anaerobic aging conditions, which is termed as reversion, the vulcanizates are exposed to elevated t…