Materials Literature
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A series of polyimide (PI)/organoclay nanocomposite foams containing different contents of organoclay were prepared by the monomer in situ intercalative polymerization. The effect of organoclay on the chemical structure, morphology, mechanical, and thermal properties of the nanocomposite foams was studied. Fourier tra…
We study the effect of self-assembled monolayer (SAM) organic molecule substrate on large scale single layer graphene using infrared transmission measurement on Graphene/SAM/SiO2/Si composite samples. From the Drude weight of the chemically inert CH3-SAM, the electron-donating NH2-SAM, and the SAM-less graphene, we de…
This study reports a method of using patterned electrodes on a piezoelectric substrate to generate local strain to control magnetic properties of individual magnetic units. By operating different effective electrode pairs on a piezoelectric substrate, a local bi-axial strain is generated. This rotates the magnetic ani…
Plasmon-enhanced heating has been directly studied through the observation of the change of Raman spectra of Au-Fe2O3 composite catalyst and Fe2O3 alone under 532 nm laser excitation. Strong plasmonic heating is observed in the Au-Fe2O3 nanoparticle composite which can be plasmonically heated 200 °C higher than Fe2O3…
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We investigate the electronic structures of (X = Li, K, Cs) by using Tran and Blaha's modified Becke and Johnson exchange potential. Calculated energy gaps are substantially better than previous first-principles results with respect to experimental values. The substantial improvement is achieved because the conduction…
Spot moiré fringes are generated by the superposition between a nanoporous structure and a digital three-way grating. The spot moiré fringes are useful for the characterization of the domain boundaries and structural parameters in ordered nanoporous materials. The pitches and the orientations of the nanopore arrays in…
ABSTRACT The poly( l ‐lactide)‐ b ‐poly(ethylene glycol)‐ b ‐poly( l ‐lactide) block copolymers (PLLA‐ b ‐PEG‐ b ‐PLLA) were synthesized in a toluene solution by the ring‐opening polymerization of 3,6‐dimethyl‐1,4‐dioxan‐2,5‐dione (LLA) with PEG as a macroinitiator or by transterification from the homopolymers [polyla…
La 0.7 Sr 0.3 MnO 3−δ (LSM) cathode materials have been prepared through pyrolysis of liquid precursors and by solid-state reaction. We examined the effect of the cathode material synthesis procedure on the growth of thin films of a solid electrolyte based on Y 2 O 3 -stabilized ZrO 2 (YSZ) nanopowder with an average…
We report on the enhanced ultraviolet (UV) photoconductivity of zinc oxide (ZnO) nanostructures in vacuum. Nanoparticles and nanorods of ZnO were fabricated using a simple cost-effective solid state grinding method. Morphology of the nanostructures was studied using transmission electron microscopy, while the optical…
ZnO thin films degenerately doped with Si (SixZn1−xO) in the concentrations range of ∼0.5% to 5.8% were grown by sequential pulsed laser deposition on sapphire substrates at 400 °C. The temperature dependent resistivity measurements in the range from 300 to 4.2 K revealed negative temperature coefficient of resistivit…
In the field of regenerative medicine we aim to develop implant matrices for specific tissue needs. By combining two per se, cell-permissive gel systems with enzymatic crosslinkers (gelatin/transglutaminase and fibrinogen/thrombin) to generate a blend (technical term: quattroGel), an unexpected cell-selectivity evolve…
The electrical service behavior of ZnO nanowires (NWs) with various diameters was investigated by a nanomanipulation technique. The nanodamage and nanofailure phenomena of the ZnO NWs were observed when external voltages were applied. The threshold voltages of the ZnO NWs increased linearly from 15 to 60 V with increa…
Wood fibers are easily available as a waste material, and their incorporation into polymeric matrices results in a reduction of the cost of composite products. On the other hand, poly(3-hydroxybutyrate- co-3-hydroxyvalerate) is a biodegradable bacterial polyester and it is a potential candidate to replace conventional…
For polyelectrolyte multilayers (PEMs) assembled by the layer-by-layer (LbL) assembly technique, their nanostructure and properties can be governed by many parameters during the building process. Here, it was demonstrated that the swelling of the PEMs containing poly(diallyldimethylammonium chloride) (PDDA) and poly(s…
We have used a multi-scale physics-based model to predict how the grain size and different grain boundary morphologies of polycrystalline graphene will impact the performance metrics of graphene field-effect transistors. We show that polycrystallinity has a negative impact on the transconductance, which translates to…
The aim of this work was to describe the density and viscosity and water tolerance of 1-butanol-gasoline blends. Density and viscosity of 1-butanol are higher than that for gasoline and they can affect these parameters in the final gasoline blend. Density increases linearly and viscosity exponentially with the content…
The compounds Bi2MoO6 (m = 1), Bi3NbTiO9 (m = 2), Bi4Ti3O12 (m = 3), BaBi4Ti4O15 (m = 4), and Ba2Bi4Ti5O18 (m = 5) (Aurivillius phases with the general formula A m − 1Bi2B m O3m + 3) have been synthesized by solid-state reactions. Using differential scanning calorimetry and high-temperature X-ray diffraction, we have…
Transmission electron microscopic study of crack propagation in a fine-grained Mg–Zn alloy shows a complex interplay of slip and twinning, leading to formation of twin-related nano-sized domains of 50 nm size related by {1 0 1} and {1 0 2} twin orientations. Subgrain formation with low angle boundaries is followed by…
Red mud (RM) is a large quantity waste product in the production of alumina. There is still no efficient way to deal with it in the world. Using RM as a raw material to synthesise Mg–Al–Fe ternary layered double hydroxide (LDH) is a feasible way to solve this global problem. The synthesised LDH was characterised by X-…