Materials Literature
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A facile and green approach has been developed using supercritical CO2 as penetrant, expanding agent and antisolvent, and pyrene-polymers as a molecular wedge and modifier, leading to high-throughput graphene dispersions. Herein, two specially designed pyrene-polymers with a large planar aromatic group and two substit…
Up-conversion nanoparticles (UCNPs) have exhibited great potential in biological imaging and labeling. The further development of the correlated techniques strongly depends on the stability of UCNPs in buffers and biological growth media. In this paper, Pluronic F127, a nonionic triblock copolymer of poly(ethylene oxi…
Polymer-induced liquid precursor (PILP) phases of calcium carbonate have attracted significant interest due to possible applications in materials synthesis, and their resemblance to intermediates seen in biogenic mineralisation processes. Further, these PILP phases have been formed in vitro using polyelectrolytes such…
The degradation of composite mesoporous silica nanoparticles is quite important for the in vivo use of this delivery carrier. We investigated the dynamic silica degradation of core–shell structured magnetic mesoporous silica nanoparticles (M-MSNs) and its counterpart with polyethyleneimine coating (M-MSN@PEI) in PBS.…
Aurivillius ferroelectrics K(0.25)Na(0.25)La(0.5)Bi(2)Nb(2)O(9) (KNBN-La) and K(0.25)Na(0.25)Bi(2.5)Nb(2)O(9) (KNBN-Bi) were prepared by using solid-state reaction process. Rietveld refinements for the KNBN-La and KNBN-Bi were carried out by using powder X-ray diffraction at room temperature and they were confirmed to…
The molecular dynamics of PVA/AgnP composites were studied by dielectric spectroscopy (DS) in the 20–300°C temperature range. Improper water elimination leads to misinterpretation of thermal relaxations in PVA composites in agreement with the previous report for pristine PVA. The evaporation of water and its plasticiz…
The thermally induced shape memory effect (SME) is the capability of a material to fix a temporary (deformed) shape and recover a 'memorized' permanent shape in response to heat. SMEs in polymers have enabled a variety of applications including deployable space structures, biomedical devices, adaptive optical devices,…
The aim of the present study is to check the influence of annealing under vacuum and a mixture of N(2)-H(2) atmosphere on the magnetic properties of polycrystalline Co-doped CeO(2) diluted magnetic oxides (DMOs) with Co concentrations of 5 at% synthesized using the coprecipitation technique. X-Ray diffraction (XRD) pa…
This work highlights the free- and fixed-strain shape-memory response of amorphous (meth)acrylate-based shape-memory polymers as the level of crosslinking is varied from uncrosslinked to highly crosslinked (corresponding to a decrease in failure strains and overall increase in rubbery moduli and failure stresses). The…
Biodegradable Y-shaped amphiphilic block copolymer mPEG-b-PLG-b-(PLA)2 was synthesized and characterized by 1H NMR and FTIR. The amphiphilic property of the copolymer with a mPEG-b-PLG segment as the hydrophilic arm and two PLA segments as the hydrophobic arms endows the copolymer with the ability to form core–shell n…
Ceria supported nickel oxide catalysts with varying nickel loadings from 1.0 to 20.0 wt% were prepared by the impregnation method. The catalysts were characterized by X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (UV-DRS), temperature programmed reduction (TPR), temperature programmed desorption…
Eight imidazole-based compounds 4-methyl-2,6-bis(4,5-diphenyl-1H-imidazol-2-yl)phenol ( A-dp), 2-(1H-phenanthro[9,10-d]imidazol-2-yl)phenol ( B-2H), 5-methoxy-2-(1H-phenanthro[9,10-d]imidazol-2-yl)phenol ( B-2H4M), 3-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)phenol ( C-3H), 2-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-y…
Thin films of Bi2Te3 and Sb2Te3 were synthesized by the nanoalloying approach, which has recently been proven to yield V–VI compounds with good thermoelectric properties and has several advantages over “conventional” growth on hot substrates. Firstly, repeating layers of the elements Bi, Sb and Te with a thickness in…
Here we report a photochemical and kinetic study of the thermal relaxation reaction of a double azobenzene system, in which two azobenzene photochromic units are connected via a phenyl ring. Upon UV irradiation, three thermally unstable isomers are formed. Kinetic studies using arrayed (1)H-NMR spectroscopy revealed f…
We generated SnO2 alignment films with one of two liquid crystal (LC) molecular orientations: a stable, vertical orientation or a homogeneous orientation. We changed the molecular orientations by altering the growth temperature of radio-frequency (RF) magnetron sputtering. An ion-beam (IB) advanced system was used to…
We report a chemical oxidative method for polyindole-tinoxide (Pin–SnO2) synthesis and its electro-catalytic application. Our method consists of chemical polymerization of an indole monomer in the presence of dispersed nano SnO2 at two different pHs i.e. below and above the isoelectric point of the SnO2. Nano SnO2 wit…
In this work, a novel quantum dot (QD) cytotoxicity assay platform on a microfluidic three-dimensional (3D) culture device via imitating the diffusion process between blood vessels and tissues was developed. The device is composed of a main channel and two sets of cell culture chambers. The cell culture chambers were…
Yb3Fe5O12 ceramics with garnet structure were prepared employing the solid-state reaction method. The results reveal that the emergence of Fe2+ ions greatly affects dielectric relaxation, magnetic relaxation, saturation magnetization, and magnetoelectric coupling, which was further confirmed by oxygen treatment. More…
Endosomal pH-driven linkage-disintegration is a promising strategy to achieve intracellular delivery and controlled drug release. In this paper, a rapid endosomal pH-sensitive MSNs ensemble (i.e., MCM-TAA-Fe3O4) with magnetic nanoparticle caps was developed by anchoring superparamagnetic Fe3O4 nanoparticles on the por…
Bismuth ferrites have been prepared using a hydrothermal method in a reaction solution containing a mineralizer with various ratios of KOH/NaOH. The phases and morphology of the bismuth ferrites were examined for reaction systems with two different molar ratios of Bi3+/Fe3+, 1 and 1/2. For the reaction system of Bi3+/…