Materials Literature
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Chromating and phosphating processes have caused severe environmental, health, and industrial concerns. Therefore, developing chrome-free conversion coatings has played an important role in overcoming these issues. In this study, two kinds of titanium-based conversion coatings (H2TiF6 and TiCl4) were developed for col…
Tissue-engineered heart valves are promising alternatives to address the limitations of current valve replacements, particularly for growing children. Current heart valve tissue engineering strategies involve the selection of biomaterial scaffolds, cell types, and often in vitro culture conditions aimed at regeneratin…
Smart windows" are envisaged for future low-energy, high-efficient architectural buildings, as well as for the car industry.By switching from coloured to fully bleached state, these windows regulate the energy of solar flux entering the interior.Functional layers in these devices are the transition metals oxides.The m…
Polyaniline nanofibers and their composites with carbon nanotubes were developed as an effective flame-retardant material using a facile green method. Polyaniline nanofibers were used as a smart flame-retardant for acrylonitrile–butadiene–styrene polymer. The polyaniline nanofibers were dispersed in polymer matrix for…
The protonation state of the deazaflavin dependent nitroreductase (Ddn) enzyme bound cofactor F420 was investigated using UV-visible spectroscopy and computational simulations. The reduced cofactor F420H2 was determined to be present in its deprotonated state in the holoenzyme form. The mechanistic implications of the…
The displacement of single atoms may have detrimental effects on the functionality of nanoparticle photocatalysts. Understanding the atomic-scale phenomena is the key to the rational design of photocatalysts to prevent undesired events during their synthesis and operation. Here, we used high resolution TEM to study su…
Expandable graphite (EG) has attracted more and more attention in fire science society due to its excellent char-forming ability, however, it cannot meet commercial flame-retardant requirements because of the low intensity of the char. This work reported our very recent efforts on improving the char quality of EG by i…
In this work, we investigate the efficient energy transfer occurring between ZnO nanocrystals (ZnO-nc) and europium (Eu(3+)) ions embedded in a SiO2 matrix prepared using the sol-gel technique. We show that a strong red emission was observed at 614 nm when the ZnO-nc were excited using a continuous optical excitation…
Nanostructured core/shell electrodes have been experimentally demonstrated promising for high-performance electrochemical energy storage devices. However, chemical insights into the significant roles of nanowire cores on the growth of shells and their supercapacitor behaviors still remain as a research shortfall. In t…
ABSTRACT In an attempt to reduce the high volatile organic compound (ethanol) emissions from silica-reinforced NR compounds, this work aimed to, at least partially, replace the use of large quantities of silane coupling agent bis-(3-triethoxysilylpropyl) tetrasulfide (TESPT). The use of 7.5 phr of epoxidized natural r…
To eliminate the elaborate processes employed in other non-biological-based protocols and low cost production of silver nanoparticles (AgNPs), this study reports biogenic synthesis of AgNPs using silver salt precursor with aqueous extract of Aspergillus fumigates MA. Influence of silver precursor concentrations, conce…
From recent studies on bone and shell formation, the importance of polysaccharides in biomineralization processes is gradually being recognized. Through ion-complexation and self-assembly properties, such macromolecules have remarkable effects on mineralization. However, their influences on the different regimes of cr…
To investigate the effects of local density fluctuations on phonon propagation in a hydrogen bonded structure, we studied the thermal conductivity κ of the crystal, liquid, and glassy states of pure glycerol as a function of the temperature, T, and the pressure, p. We find that the following: (i) κcrystal is 3.6-times…
Understanding the activity of nanomaterials at the lipid bilayer surface can provide key information for the feasible design of functional bioactive agents. Herein, we used micro- and nanoscopic imaging techniques to evaluate the activity of nanometer-sized inorganic clusters and report that destruction of the lipid m…
A highly regular one-dimensional domain pattern is formed in ferroelectric K 0.75 Na 0.25 NbO 3 thin films grown on (110) TbScO 3 substrates using metal–organic chemical vapour deposition (MOCVD). The domain pattern exhibits a lateral periodicity of about 50 nm and extends over several micrometres. The monoclinic symm…
Zinc oxide nanorods (ZnO NRs), synthesized by a low temperature chemical method, were postannealed at 260 °C in air and under high pressure water vapor (HWA) at 1.3–3.9 MPa. We found that the UV luminescence intensity increased by a factor of 2–3 after HWA annealing compared to that observed after annealing in air. St…
Block copolymer phase separation has been employed to form templates for the fabrication of nanoscale patterns of metals due to their characteristic size scales that range from several nanometers to tens of nanometers. In the present work, poly(vinyl catechol‐ block ‐styrene) PVCa‐ b ‐PSt synthesized with various comp…
We have designed and developed a new strategy for the chemical and electrochemical graft copolymerization of aniline onto poly(vinyl chloride). For this purpose, first phenylamine groups were incorporated into poly(vinyl chloride) via a nucleophilic substitution reaction in the presence of a solvent composed of 4-amin…
The optimum implementation of a thermoelectric generator (TEG) is investigated. In order to study the feasibility of such system, a model for a large-scale TEG is designed and optimized to convert thermal energy into electricity. The mathematical formulation of the system comprising multiple TEG modules is modeled and…
The plasmon-driven oxidation of amine (-NH2) groups and the reduction of nitro (-NO2) groups on a nanostructured metal surface in an aqueous environment have been reported experimentally and theoretically. The question of which process occurs first in the aqueous environment is an interesting question in the field of…