Materials Literature
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Ordered mesoporous films are synthesized from the vapor-phase condensation of tetraethyl orthosilicate within preformed amphiphilic template films consisting of a blend of poly(ethylene oxide)- b -poly(propylene oxide)- b -poly(ethylene oxide) (Pluronic F127) and poly(4-hydroxystyrene) (PHOSt). By modification of the…
We have investigated the energy transfer dynamics in mixed lanthanide open-framework silicates, known as Ln-AV-20 materials, with the stoichiometric formula Na 1.08 K 0.5 Ln 1.14 Si 3 O 8.5 ·1.78H 2 O (Ln = Gd 3+, Tb 3+, Eu 3+ ), using steady-state and time-resolved luminescence spectroscopy. Energy transfer between d…
The present work shows the behavior of non-treated and chemical pre-treated peach palm fibers, as reinforcement polymer composites. Chemical treatments with H 2 O 2, NaOH, and C 3 H 3 N and their effects on adhesion performance of the fiber with unsaturated polyester resin are carried out. SEM is used to determine a t…
Applications of carbon nanotubes (CNTs) like field emission displays, super-capacitors, and cell growth scaffolds can benefit from controllable embedding of the CNTs in a material such that the CNTs are anchored and protrude a desired length. We demonstrate a simple method for anchoring densely packed, vertically alig…
Fluorescence blinking of silver nanoparticle films is observed when illuminated with red light (635 nm). The observed power-law off-time distribution is attributed to random surface diffusion and subsequent agglomeration of atomic Ag leading to the formation of photo-active Ag nanoclusters. These nanoclusters can in t…
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…