Materials Literature
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Current density was a key factor of plasma electrolytic oxidation (PEO) process. It influenced the composition, morphology and corrosion resistance of ceramic coatings on ZK60 Mg alloy by plasma electrolytic oxidation in Na2SiO3 solution. The microstructure and composition of coatings were examined by scanning electro…
The syntheses of gold nanoclusters, namely, the 25-gold-atom nanocluster (Au25(SR)18) and 38-gold-atom nanocluster (Au38(SR)24), with SR representing the thiol ligand, were described in previously reported studies. The synthesis was via a fast reduction process using sodium borohydride. The ratio of Au:HSR:NaBH4 was 1…
  Introducing substantial mesoporosity in zeolites has recently attracted more interests in both fundamental and applied research, thanks to the integration of the advantages of mesoporous materials and zeolite crystals. This article highlights the recent developments of synthesis, characterization a…
Abstract In this study, the influence of β‐nucleation agent (β‐NA) on the morphology and properties of multi‐walled carbon nanotube (MWCNT) filled isotactic polypropylene (iPP) composites was explored in details. The results show that the incorporation of β‐NA has promoted the dispersion of MWCNT in the iPP matrix, wh…
The surface-enhanced coherent anti-Stokes Raman scattering (SECARS) from a self-assembled monolayer (SAM) of benzenethiol on a silver-coated surface-enhanced Raman scattering (SERS) substrate has been measured for the 1574 cm(-1) SERS mode. A value of 9.6 ± 1.7×10(-14) W was determined for the resonant component of th…
CdSe is a II-VI group semiconducting material with optimum bulk band gap of 1.74eV. It is a promising material due to its wide range of technological applications in optoelectronics devices. CdSe nanoparticles have been synthesized at different temperatures starting from Room temperature to 80°C using appropriate prec…
High-temperature and high-pressure electrochemical measurement techniques, scanning electron microscopy and X-ray diffraction were applied to investigate the effects of the corrosion product films formed on the surface of L360NCS pipeline steel at different temperatures on the hydrogen permeation and the corrosion rat…
Urban trees have aesthetic functions and mitigate high temperatures, however their maintenance requires constant pruning. This work aimed to apply the tailings resulting from tree management in particleboard production. Particles from urban tree pruning of Jatobá, Canelinha and mixture of these species were used, in…
Organic semiconducting materials have been a subject of intensive studies recently, fueled by both academic interest and a series of potential technological applications. Their molecular structure characterized by extended π-electron systems can be easily tuned by chemical substitution. The most promising organic semi…
The spectral properties of trivalent erbium ions (Er 3+ ) are systematically studied in a melt-quenched germanate glass (60 GeO 2 -20PbO-10BaO-10K 2 O-0.1Ag 2 O) containing silver (Ag) particles. Thermal treatment of the material leads to the precipitation of Ag particles as observed by transmission electron microscop…
A microscopic study of electronic transport in suspended monolayer graphene is presented. The results have been obtained by means of an ensemble Monte Carlo simulator that takes into account the main physical properties of the graphene bandstructure and the most relevant scattering mechanisms for this type of material…
To study the discharge performance of air gap under rain conditions and provide reference to the selection of clearance distance of external insulation in strong rain, this paper explored the influence of different environment conditions, rain intensity, rain conductivity, and ambient temperature on the dc positive br…
Abstract Kleberite, ideally Fe 3+ Ti 6 O 11 (OH) 5 , is a new mineral (IMA 2012-023) from Tertiary sands at Königshain, Saxony, northeast Germany. It is also found in heavy mineral sands from the Murray Basin, southeast Australia and at Kalimantan, Indonesia. It occurs as rounded anhedral to euhedral translucent grain…
Nucleation of single-walled carbon nanotubes (SWCNTs) from C 2 molecules adsorbed on silicon nanoparticles (SiNPs) has been investigated using quantum chemical molecular dynamics (QM/MD) simulations. The SWCNT nucleation mechanism was observed to be strikingly different from that of traditional, transition metal catal…
We propose to use wavelength modulation approach, i.e., the spectroscopy of a surface plasmon in the frequency domain, to characterize the optical dispersion property of gold film. Using this method, we determine the dispersion relationship of gold film in a wavelength range from 537.12 nm to 905.52 nm, and our result…
Co-P-B/FeCrAlloy 촉매의 <TEX>$NaBH_4$</TEX> 가수분해 특성과 내구성에 대해 연구하였다. 5 wt% <TEX>$NaBH_4$</TEX> 농도에서 활성화 에너지가 25.2 kJ/mol로 귀금속 촉매와 비슷했고, <TEX>$NaBH_4$</TEX> 농도가 증가할수록 활성화 에너지가 증가하였다. 20 wt% 이상의 <TEX>$NaBH_4$</TEX> 농도에서 겔 형성이 수소발생과 촉매 내구성에 많은 영향을 줬다. <TEX>$NaBH_4$</TEX> 농도가 높을 때 반응온도가 높을수록 겔 형성이 안 되므로 촉매 손실률이 낮았다. 수소발생과 촉매…
The Rhizophora spp. wood what is hard and heavy is considered strong in strength and is suitable for structural purposes. Generally, Rhizophora spp. was used in radiation dosimetry research and it is being used in this project too. There are some disadvantages in using the raw (natural) material of Rhizophora spp. in…
Nanocellulose has attracted a great deal of interest as a source of nanometer-sized materials because of their biodegradability, easy availability, and the related characteristics such as a very large surface-to-volume ratio, and outstanding mechanical property. This article assembles the current applications of nanoc…
Poly(methyl methacrylate)‐based copolymers were prepared by solution copolymerization of methyl methacrylate (MMA) with methacrylamide (MAAM) or methacrylic acid (MAA) in dioxane. The blends of poly(methyl methacrylate‐ co ‐methacrylamide) (MMA‐MAAM) with poly(methyl methacrylate‐ co ‐methacrylic acid) (MMA‐MAA) were…
Three dimensional (3D) hierarchical nanostructures are expected to provide enhanced microwave absorption properties for nanomaterials. In this report we prepared hollow urchinlike alpha-MnO2 nanostructures and dispersed alpha-MnO2 nanorods via a facile hydrothermal method. The complex permittivity and permeability of…