Materials Literature
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Immiscible polymer blends were prepared by melt extrusion using a single screw extruder in the systems PS/HDPE and PS/PP to assess the effect of composition and morphology on tensile Young’s modulus and impact resistance. Results from the work show that tensile modulus nearly follows rule of mixture behavior for both…
A novel plasma enhanced atomic layer deposition (PEALD)-grown mixed-phase/nano-laminate barrier has been developed which combines the robust barrier properties of TaN with direct plate characteristics of Ru. Preliminary investigation indicates that Ru:TaN layers as thin as 5 nm can be designed to act both as robust co…
Manganese oxide films for electrochemical supercapacitors (ES) have been prepared by cathodic electrolytic and electrophoretic deposition. The cathodic reduction of KMnO4 solutions resulted in the formation of manganese oxide deposits. In another approach electrophoretic deposition (EPD) has been utilized for the depo…
A novel technique using a focused ion beam (FIB) set up with a cryo-stage was developed to prepare a flat surface on a membrane electrolyte assembly (MEA) for scanning electron microscope (SEM) observations. The microsample was first trimmed by an ultramicrotome for use in the novel technique. The standard ultramicrot…
Abstract The goal of our “complete experimental” approach was to relate the Raman response of an individual single‐walled carbon nanotubes (SWNT) to its ( n , m ) structure determined from an independent way. In this aim, a procedure including transmission electronic microscopy (TEM), Raman spectroscopy, and electron…
Field effect device (FED) manufactured from monolayer graphene are investigated. A conventional CMOS-compatible top-down process flow is applied, except for graphene deposition. From IVcharacteristics carrier mobilities in graphene pseudo-MOS structures are extracted and compared to state-of-the-art silicon MOSFETs. T…
We studied the synthesis of nanoporous gold (NPG) films using electrodeposited Au-Ni as a precursor for dealloying. Potentiostatic dealloying of amorphous Au-Ni (Ni 65, 77, and 85at%) films at 0.7VSCE in 10mM H2SO4, resulted in the formation of nanoporous structures with average pore diameter increasing with Ni conten…
Wet-only removal of post-etch (meth-)acrylate based photoresist on porous low-k dielectrics applied in either resist or metal hard mask based patterning is investigated. Characterization of photoresist degradation by etch is applied to support the selection of wet cleaning chemistries and/or cleaning processes. FTIR a…
Abstract Selective catalytic reduction (SCR) of NO x by NH 3 is an efficient technology for the removal of nitrogen oxides from diesel exhaust. It is a disadvantage that the active component in commercial catalysts, V 2 O 5 , is toxic and melts at ∼650 °C. An alternative catalyst system, based on iron as the active co…
Abstract Poly(ϵ‐caprolactone)/organomodified montmorillonite nanocomposites were prepared by in situ polymerization with dibutyltin dimethoxide as an initiator/ catalyst. The montmorillonite was first modified with 1‐decyl‐2‐methyl‐3‐(11‐hydroxyundecyl)imidazolium cation. The hydroxyl functionality was used not only f…
Abstract Rotational molding of foamed polyethylene has increasingly become an important process in industry due to its ability to produce innovative and high added value parts with little specialist equipment required. The polyolefin foam production tends to achieve the highest possible cell size uniformity and cell s…
Abstract Inorganic‐cellulose core‐shell and hollow cellulose nanoparticles were prepared by self‐encapsulation with regenerated cellulose in a poly(acrylic acid) hydrogel layer surrounding inorganic particle templates in N ‐methylmorpholine oxide (NMMO) (4‐methylmorpholine N ‐oxide) monohydrate solution. The hydrogel…
The interaction between a colloidal hard sphere of radius R and a wall or between two spheres in a dilute suspension of infinitely thin rods of length L is calculated numerically. The method allows the study of depletion potentials for any value of LR and, consequently, the influence of rod length polydispersity can b…
Corrosion resistant materials under atmospheric conditions can suffer from localized corrosion. The stability of such a localized corrosion site requires that the site (anode) must dissolve at a sufficient high rate to maintain the critical chemistry and a wetted surrounding area (cathode) provides matching cathodic c…
A novel class of electrocatalyst for oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cell (PEMFC) was prepared by electrochemically dealloying Pt25Cu75 precursor alloys in a membrane electrode assembly (MEA) cathode. The precursor was prepared by a novel liquid impregnation-freeze drying route. Th…
We report on a novel strategy to modify surface electrocatalytic reactivity of Pt bimetallic nanoparticles for the oxygen reduction reaction (ORR). We voltammetrically dealloy Cu rich Pt-Cu precursor until we obtain a Cu free catalyst surface. This dealloyed Pt surface exhibited up to fivefold improved ORR activities…
Camptothecin (CPT) is an alkaloid that displays considerable antitumour activity, but clinical use has been limited by its poor water solubility and the instability of the lactone moiety (active form) in physiological media. We have therefore formulated the drug into nanocarrier systems in an attempt to improve its th…
Pressure-induced phase transitions in the nanocrystals of ReO 3 with an average diameter of ∼12 nm have been investigated in detail by using synchrotron x-ray diffraction and the results compared with the literature data of bulk samples of ReO 3 . The study shows that the ambient-pressure cubic I phase (space group )…
Abstract We investigate the effect of irradiation by Ar + and N + ions on the properties of thin transparent networks of single‐wall carbon nanotubes (SWNTs). The irradiation produces a small reduction in the infra‐red transmittance of the networks at a wavelength of 2000 nm that correlates with the much larger reduct…
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