Materials Literature
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The present study was carried out on the effect of acid leaching on the modification and structure alteration of montmorillonite. A nanostructured, activated material was prepared by selective leaching of pure smectite clay with different concentrations of sulfuric acid (1 - 10 N/L) at 85°C for 120 min using a solid/l…
As a unique type of soft building block, graphene oxide (GO) dispersions are easy to process to produce electronic devices. Developing methods to produce large sized GO with controllable structure is the key for these applications. Here, ultra-large graphene oxide (UL-GO) sheets (up to ∼100 μm in lateral size) were pr…
In this study, we report spontaneous formation of two characteristic micrometer-scale liquid crystal (LC) droplet patterns on solid surfaces and also demonstrate the application of the designed LC platform to construct new types of LC-based sensors. By simply spreading LCs dissolved in organic solvents on glass micros…
Rare-earth (RE) doped transparent glass-ceramics are presented as very promising materials for optical applications. In this work, Transmission Electron Microscopy techniques have been used to structurally characterize a glass of composition 55SiO2–20Al2O3–15Na2O–10LaF3 (mol%), doped with 1 mol% Tm2O3, and the corresp…
Plasmonic excitations in pristine and air-exposed graphene-Ru and graphene-Pt contacts have been investigated by using high-resolution electron energy loss spectroscopy. Loss measurements show that the effects of air exposure are very different in these two systems. While in graphene-Ru contacts, plasmons are complete…
Liquid-crystalline perylene tetracarboxylic bisimide derivatives bearing heptamethylcyclotetrasiloxane moieties have been synthesized. Compound 2 bearing four heptamethylcyclotetrasiloxane moieties exhibits a rectangular columnar phase at room temperature. In the columnar phase, the cyclotetrasiloxane rings interdigit…
We describe the synthesis, characterization and photophysical properties of the dyads Zn2DEP·TNF (1) and Zn2DEP·2Py-BDP (2) and triad Zn2DEP·2Py-BDP·TNF (3), which enable us to investigate the changes in the spectroscopic properties upon the axial coordination of pyridine substituted bodipy (Py-BDP) to Zn2DEP in the d…
Tailor-made highly ordered macro/mesoporous hierarchical metal architectures have been created by combining sphere lithography, membrane template electrodeposition and alloy-etching processes. The new double-template preparation route involves the electrodeposition of Au/Ag alloy within the interstitial (void) spaces…
We have characterized the binding of cytoskeletal proteins, namely, tubulin and actin, with silver nanoparticles using the techniques of dynamic light scattering, UV-Vis spectrophotometry, circular dichroism spectroscopy, hyperspectral imaging, and transmission electron microscopy. Overall, actin displayed a higher pr…
A novel organic microporous polymer (HTP) has been synthesized from a hexaphenylbenzene based triptycene monomer by Ni(0)-catalyzed Ullmann cross-coupling reaction, which displays a BET surface area of 1151 m2 g−1 and reversibly 12.5 wt% CO2 at 1.0 bar/273 K.
Effective Er and Eu doping of α-Bi2O3 nanowires has been achieved by ion implantation. The nanostructures exhibit stable and efficient photoluminescence emission at room temperature after adequate annealing. X-ray photoelectron and X-ray absorption spectroscopy measurements reveal the incorporation of Er and Eu ions o…
Phenanthroline–tetraphenylethene (Phen–1TPE) was synthesized by a typical Suzuki coupling. The aggregation-induced emission (AIE) properties and interactions with metal ions in THF–water (fw = 90%) and in THF were investigated. Aggregation-induced emission logic gates were fabricated based on the metal ion sensing of…
A spider's ability to store silk protein solutions at high concentration is believed to be related to the protein's terminal domains. It has been suggested that a shift in salt concentration and pH can have a significant influence on the assembly process. Based on experimental data, a model has been proposed in which…
Room-temperature ferromagnetism has been observed in Mg-doped AlN (AlN:Mg) nanowires. The saturation magnetization and the coercivity of the AlN:Mg nanowires are about 0.051 emu g−1 and 127 Oe, respectively. The Al vacancy and substitutional Mg could play very important roles in room temperature ferromagnetism. These…
We investigated the temperature-responsive gelation of collagen/genipin solutions using pepsin-solubilized collagen (PSC) and acid-solubilized collagen (ASC) as substrates. Gelation occurred in the PSC/genipin solutions at genipin concentrations 0-2 mM under moderate change in temperature from 25 to 37°C. The PSC/geni…
ZnO/Ag sea urchin-like hybrids were prepared through the reaction of zinc salts with KOH to form ZnO particles. This was followed by the deposition of Ag nanoparticles (NPs) onto the surface of the ZnO particles. As the duration of the photochemical deposition reaction was extended from 0.5 h to 2 h then 8 h, the size…
To understand the effects of the modular motifs on the silk fibroin self-assembly, regenerated silk fibroin (RSF) and synthetic SF model peptides (GS6: GAGAGS; GS10: GAGAGSGAAS; GY8: GAGAGVGY; GY6: GAGAGY) were prepared and then their self-assembly behaviors were investigated by atomic force microscopy, scanning elect…
In this study, Pb-MnO 2 composite anodes were developed through single-action powder pressing.The effect of MnO 2 content of the composite anodes on the physical and electrochemical properties of the samples were investigated and compared with those of the pure pressed Pb and a commercial Pb-Sn-Ca electrowinning anode…
ZnO nanorods were grown on thermally oxidized p‐type silicon substrate using sol‐gel method. The SEM image revealed high‐density, well‐aligned, and perpendicular ZnO nanorods on the oxidized silicon substrate. The XRD profile confirmed the c‐axis orientation of the nanorods. PL measurements showed the synthesized ZnO…
Silicon–boron–carbon–nitrogen (Si–B–C–N) monoliths with high, interconnected and hierarchical porosity have been prepared by spark plasma sintering (SPS) of ordered mesoporous powders with a P6mm hexagonal symmetry at low temperature without any sintering additives. The ordered mesoporous Si–B–C–N powders derived from…