Materials Literature
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A simulation of dislocation patterning in a two-dimensional multislip configuration is carried out by means of coarse graining in the presence of plastic strain. In order to study the influence of climb on the dislocation cell pattern formation, fatigue simulations with and without climb mobility are performed and com…
Electrically charged cellular polymers are known to display pseudo-piezoelectric effects that endow them with interesting mechano-electrical characteristics. When a film of such a polymer is compressed, charge is generated across its thickness, and conversely, applying an oscillatory or static potential elicits mechan…
Solutions of polyacrylonitrile (PAN) were electrospun using a range of process parameters, resulting in fibre diameters from 10 to 320 nm. A nonlinear neural network system model was used to analyse the dependence of the fibre diameter on the process parameters, and used to simulate conditions for electrospinning 40-6…
Onionlike functional microspheres were obtained by aerosol-assisted self-assembly of a functional block copolymer, poly(3-(triethoxysilyl)propyl methacrylate)-block-poly(2-vinylpyridine) (PTEPM-b-P2VP). Through a self-gelation reaction in PTEPM layers, onionlike organic/inorganic hybrid spheres were prepared. Using P2…
Mechanical properties of polyaniline (PANI) coated self-assembled tobacco mosaic virus (TMV) nanotubes were measured by nanoindentation with an atomic force microscope (AFM) probe. The elastic modulus of PANI/TMV core-shell biocomposite tubes (outer diameter: 19 nm, inner diameter: 4 nm, PANI coating thickness: 0.5 nm…
Abstract The morphology of metal‐assisted electroless etched n‐type silicon in HF–oxidizing agent–H 2 O etching system as a function of oxidizing type and etching time was studied. Three types of oxidizing agent were investigated: Na 2 S 2 O 8 , K 2 Cr 2 O 7 and KMnO 4 . The layers formed on silicon were investigated…
Poly(4-hydroxycinnamic acid) (P4HCA), poly(3-hydroxycinnamic acid) (P3HCA), poly(3-methoxy-4-hydroxycinnamic acid) (PMHCA) and poly(3,4-dihydroxycinnamic acid) (PDHCA) were synthesized by the thermal poly-condensation of the corresponding monomers, which are lignin precursors, coumaric acid derivatives consisting of c…
We report a new method that enables the facile synthesis of monodisperse zinc oxide (ZnO) quantum dots (QDs) with high quality photoluminescence (PL) characteristics. In the proposed method, ZnO QDs are grown on acid-treated multiwalled carbon nanotubes (a-MWCNTs) under remarkably mild reaction conditions (low tempera…
Abstract Water‐dispersible cationically modified diisocyanates TIb and TId blocked by n ‐butanol (BAO) and 3,5‐dimethylpyrazole (DMP) for cathode electrodepositing (CED) coating curing were synthesized by introducing cationic triethanolamine (TEOA) into isophorone diisocyanate (IPDI). The crosslinkers TIb and TId were…
A correlated random telegraph signal is observed from the interaction of two individual defects in a carbon nanotube transistor. It is shown that the amplitude fluctuation of one defect significantly depends on the state of the other defect. Moreover, statistics of the correlated switchings is shown to deviate from th…
Mica substrates were activated by a plasma method leading to OH-functionalized surfaces to which an atom transfer radical polymerization (ATRP) radical initiator was covalently bound using standard siloxane protocols. The unprecedented covalently immobilized initiator underwent radical polymerization with tert-butyl a…
This monograph critically reviews recent research work and developments in physical and related properties of ramie, a long vegetable bast fibre. The properties of the fibre at different stages of plant growth including topography, optical microscopy, electron microscopy, moisture regain, density, strength, tenacity,…
Rapid recovery, immobilization, and silica encapsulation of a dual-fusion enzyme was achieved by using iminodiacetic acid (IDA) modified magnetic nanoparticle as a carrier. D-amino acid oxidase (DAAO) of Rhodosporidium toruloides was used as a model enzyme in which a silica-precipitating peptide R5 and a metal ion com…
Ag-Cu bimetallic nanoclusters with different shapes were prepared by a co-complexation method in the presence of PAMAM dendrimers. Small and evenly sized spherical Ag-Cu bimetallic nanoparticles were obtained with N2H4.H2O as the reducing agent, and long rod-shaped bimetallic nanoclusters were prepared with NaBH4 as t…
Ordered mesoporous silicon nitrides with a high nitrogen content (32 wt %) were synthesized by using polycarbosilane (PCS) as a ceramic precursor and mesoporous carbon CMK-8 as a hard template via nanocasting synthesis. Small-angle X-ray scattering, TEM, and nitrogen sorption analyses showed that the mesoporous silico…
We report the synthesis of porous single crystalline ZnO nanodisks with sponge-like morphology through a wet chemical approach. To our best knowledge, this is the first report about highly porous single crystalline nanodisks of ZnO with an average diameter of ∼100 nm. The ZnO nanodisks exhibit strong visible (blue-gre…
Zirconium-doped anatase TiO 2 nanopowders and nanoceramics with particle sizes between 12 and 30 nm were investigated by EXAFS spectroscopy. Furthermore, ab initio calculations based on density functional theory were performed to analyze changes in the electronic structure due to Zr doping. Zr is dissolved on substitu…
The use of bentonites as adsorbents results from the reactivity of montmorillonite which is the main mineral in this clay-like material. Montmorillonite, a 2:1 clay mineral, impresses by a diversity of reactions in the interlayer space and at the external surfaces, which are the cause of strong adsorption of heavy met…
In this report, attempts have been made to study the influence of various factors like level of catalyst system and blowing agent, and functionality and viscosity of polyols, on the structures of various soy polyol-based polyurethane foams. Efforts are made to correlate the relative rigidity of various foams with the…
Chromium oxide nanotubes were successfully prepared using multi-walled carbon nanotubes (MWCNTs) as a template via a supercritical fluid-mediated route. In this method, with chromium (III) nitrate nonahydrate as precursor, chromium oxide was first deposited on MWCNTs in supercritical ethanol in the presence of NH(4)HC…