Materials Literature
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Abstract The ordering conformation of surfactant molecules in intercalated montmorillonite prepared at various concentrations was investigated by 13 C MAS NMR. The 13 C MAS NMR study demonstrates the coexistence of ordered and disordered chain conformations. Two main resonance peaks are associated with the backbone al…
In this paper, we examine mechanisms of electron transport across the metal-carbon nanotube (CNT) interface for two different types of multiwall carbon nanotube (MWNT) architectures, horizontal or side-contacted MWNTs and vertical or end-contacted MWNTs. Horizontally aligned nanotube growth and electrical characterist…
Abstract Several parameters which affect the nanocomposite formation in a sulfur‐cured ethylene propylene diene rubber (EPDM) containing 10 phr organoclay (montmorillonite modified with octadecylamine; MMT–ODA), were investigated. The parameters varied were linked to processing (mixer type, temperature) and rubber rec…
Nanostructures are constructed with destructively fabricated nano building blocks based on multiwalled carbon nanotubes through three-dimensional nanorobotic manipulation in free space. In situ mechanical property characterization is applied for the selection of a nanotube with desired elasticity. Destructive fabricat…
Abstract Raman spectroscopy was assessed for its ability to rapidly identify asbestos phases by submitting the amphiboles anthophyllite, amosite, crocidolite and tremolite to spectroscopic analysis. All the phases were characterized by using XRD, SEM, TEM (CTEM, SAED), AEM and EDS techniques. This study demonstrates t…
Abstract One in four of the Cu-filled cation sites in clinoatacamite, the monoclinic polymorph of atacamite and botallackite, is angle- rather than Jahn-Teller-distorted. Experiments show that this site alone is susceptible to substitution by a non-Jahn-Teller distorting cation of suitable radius and charge, such as Z…
Hybrid inorganic/organic polymers have been prepared by copolymerizing a polyimide having the same chemical repeat unit as Kapton with an open-cage polyhedral oligomeric silsesquioxane (POSS). These POSS/polyimide hybrid polymers are Kapton-like polymers containing POSS nanoparticles that are chemically bound into the…
Abstract The oxidation of Al‐particles down to nano‐scale was investigated by TG, SEM and in‐situ X‐ray diffraction. Al particles are usually coated by a 2–4 nm layer of Al 2 O 3 which can be derived from the degree of weight increase on complete oxidation by TG‐curves. The low temperature oxidation of Al particles oc…
ABSTRACT: Seven potential variables, pretreatment temperature, pretreatment time, concentration of OH − , concentration of H + , extraction temperature, extraction time, and skin/water ratio, were investigated by a 2 7‐3 fractional factorial design to identify critical control factors for pollock skin gelatin extracti…
PURPOSE: To examine the feasibility and potential of magnetic fluid hyperthermia (MFH) as a minimally invasive method for hyperthermia treatment of prostate cancer. MATERIALS AND METHODS: Orthotopic Dunning R3327 prostate tumors were induced in 20 male Copenhagen rats. The animals either received MFH treatment followi…
For many years proteins have been investigated as therapeutic agents, but unfortunately their potential advantages could not be completely exploited. The main drawbacks are their intrinsic short life in the body, immunological adverse reaction and proteolytic digestion. Among all the approaches studied for overcoming…
Abstract Summary: Organophilized montmorillonite‐epoxy and ‐polyurethane nanocomposites, useful for packaging applications, were prepared and their oxygen permeability was measured. The composite morphology was mixed, exfoliated and intercalated, as shown by wide‐angle X‐ray diffraction (WAXRD) and transmission electr…
Abstract In this paper, the capability of the CVD technique to produce uniform foams of different properties, with cell size ranging from ∼ 450 to ∼ 3200 μm, porosity from ∼ 70 to ∼ 98 %, and nominal thickness up to 3 mm is presented. In addition to the established application as a battery electrode material, some oth…
Abstract Polypropylene (PP)/graphite nanocomposites have been prepared by melt‐mixing PP with different levels of graphite (G) and graphite oxide (GO) using maleated PP(PP‐g‐MA) and graphite oxide (GO) as interface modifiers. Melt‐mixing was achieved using a Gelimat, a high‐speed thermo‐kinetic mixer. The Gelimat syst…
This paper discusses the design, fabrication and testing of a novel thermoelectric device comprised of arrays of silicon nanowires embedded in a polymer matrix. By exploiting the low-thermal conductivity of the composite and presumably high-power factor of the nanowires, a thermoelectric figure of merit, higher than t…
Sol−gel derived poly(oxyethylene)/siloxane hybrids (di-urethanesils) doped with europium triflate, Eu(CF 3 SO 3 ) 3, were examined by XRD, 13 C and 29 Si MAS NMR and FT-IR, FT-Raman, and photoluminescence spectroscopies. The host framework of these materials consists of a siliceous network grafted through urethane lin…
Actively passivated: The surprising recovery of the luminescence intensity between 200 and 300 K for CdSe quantum dots gives insight into the importance of the interaction between the capping layer and the nanocrystal semiconductor. The vial on the left is at 160 K while the brightly luminescing solution on the right…
The dielectric properties of BaTi 0.90 Ga 0.05 Nb 0.05 O 3 (BTGN) and Ba 0.60 Sr 0.40 TiO 3 (BST) ceramics prepared by the conventional solid‐state route have been investigated. Their relative potential for microwave (MW) tunable applications was assessed by the figure of merit ( K ) defined as K = [equation omitted]…
Polydimethylaminoethyl methacrylate (PDMAEMA) was used as a multidentate ligand to modify the surface of CdSe/ZnS core-shell colloidal quantum dots in toluene with trioctylphosphine oxide (TOPO) as the surface ligand. Adsorption of PDMAEMA was accompanied by release of TOPO. The process is free of agglomeration, and t…
We report a novel method to exfoliate and disperse single-wall carbon nanotubes (SWNT) into organic and aqueous solutions. The method is based on treatment of single-wall carbon nanotubes with a solution of hydroxylamine hydrochloric acid salt [(NH 2 OH)(HCl)] and does not require truncation of the tubes or surface ad…