Materials Literature
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Hemp fiber is a strong natural fiber similar to flax, kenaf, and ramie, possessing very good fiber quality and physical properties of strength, durability, and absorbency. Hemp fiber has been increasingly used for making nonwoven composites that are ideal for the production of biobased auto interior parts. This paper…
We report on the employ of several kinds of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) dispersions as hole injection layer to increase the stability and the charge injection in organic light emitting diodes (OLEDs). The PEDOT:PSS dispersions are different for PEDOT:PSS ratios and their prope…
We have investigated the temperature and frequency dependences of the impedance components of PbTe(In) nanocrystalline films within the frequency range of $20\phantom{\rule{0.3em}{0ex}}\mathrm{Hz}--1\phantom{\rule{0.3em}{0ex}}\mathrm{MHz}$ in the temperature interval of $4.2--300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$…
Preparation and properties of Chitosan (CS)-clay nanocomposites grafted with polydimethyl siloxane (PDMS) with different clay ratios are herein discussed. CS is intercalated into sodium montmorrilonite and PDMS is grafted onto CS under UV irradiation. Sample films of CS intercalated into clay and grafted with PDMS wer…
A theoretical framework for light scattering from individual nanoscale particles or structures is developed. The main considerations distinguishing the present treatment from the theories developed for conventional light-scattering experiments are the experimental requirements for the detection of the limited light fr…
AAO membranes were detached from Al substrates via an anodic voltage pulse using aqueous HClO 4 solution without any organic reagents. Previous studies used a mixture of HClO 4 (aq) and 2,3-butanedione or methanol. However, 2,3-butanedione has a strong disagreeable odour, methanol is harmful, and the oxidized products…
A straightforward methodology for the synthesis of multifunctionalized dendrimers that is based on an orthogonal functionalization strategy has been developed. Polyamide-based dendrimers that possess both a single aldehyde and a single azide moiety on their periphery have been synthesized by using a convergent synthet…
This work investigates the transformation mechanism, at atomic level, of anatase to titanate-type structures by carrying out ab initio molecular dynamics (ab-MD) calculations with the Harris functional, including the Γ-point approximation and also several k -points. The transformation mechanism is presented and discus…
We have demonstrated the reorientation of cholesteric liquid crystal (CLC) molecules in a thick cell by acoustic streaming. In the thick cell, the initial CLC does not have a planar alignment but a focal conic state in spite of the surface being coated with a planar polyimide and rubbed unidirectionally. The acoustic…
Although the mineralogical quantitative analysis of the soil clay fraction can provide useful information for the improvement of soil management practices, the quantitation of all clay components normally requires a combination of different analytical techniques, which makes this determination expensive and time-consu…
Novel porphyrin dimer ligand and cobalt complexes by directly bridging with l-glutamic acid have been prepared and characterized. The intensities of circular dichroism and UV-vis spectra that change the aggregate morphologies of the porphyrin dimer under different temperatures have been investigated.
In this paper, we report a simple method of fabricating silver and gold nanostructures at the air - water interface, which can be spontaneously assembled through the reduction of AgNO3 and HAuCl4 with ultraviolet (UV) irradiation in the presence of polyacrylic acid (PAA), respectively. It was found that the building b…
Abstract PLLA‐MPEG diblock copolymers with a controlled number‐average molar mass ranging from 7 330 to 117 610 g · mol −1 and an L ‐lactide conversion ranging from 65.1 to 97.3% were synthesized effectively in 20 min at 100 °C by MPEG‐initiated ROP of L ‐lactide under microwave irradiation. Prolonged microwave irradi…
Carbon nanocoils (CNCs) were synthesized via thermal chemical vapour deposition (CVD) with C2H2 and NH3 gases at 600 °C. A Ni catalyst was placed upon the copper micro-tip structures that were fabricated on a silicon substrate. Our CNCs had a long rope shape with a length not exceeding 100 µm and a nanoscale diameter.…
Ultrathin manganese monoxide films on silver substrates are studied as a function of the thickness using x-ray absorption spectroscopy and x-ray photoemission spectroscopy. By combining these techniques, an improved understanding of both the local geometry and the electronic structure is achieved. It was found that bo…
Deposition parameters were varied systematically to obtain NiO/Gd-doped CeO 2 composite films using the electrostatic spray deposition method. The microstructure and morphology of the obtained films were investigated using a scanning electron microscope and an x-ray diffractometer. The degree of wetting of aerosol dro…
A Yb 3+ and Tm 3+ co-doped LuF 3 sample has been successfully prepared with a combustion−fluorization method. Five up-converted emission bands attributing to eight transitions have been observed under a 980 nm diode laser excitation. The possibility of a cooperative sensitization mechanism and a three-step energy-tran…
First-principles plane wave basis calculations were performed to investigate the atomic-scale mechanism of grain boundary (GB) sliding along the $\ensuremath{\Sigma}13$ pyramidal twin GB in $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$. It was found that the GB sliding takes place with su…
Short-circuit diffusion was observed in a single CuO nanowire synthesized using a thermal oxidation method. The confocal Raman spectra of a single CuO nanowire permit direct observation of the nature of an individual CuO nanowire. The parameter order obtained from the inverse Raman B g 2 peak linewidth results in the…
A weakly Ti-doped copper nitride (Cu 3 N) film was prepared by cylindrical magnetron sputtering. The XPS results indicate that Ti atoms do not substitute for the Cu atoms but probably locate at the grain boundaries. The columnar grains size is about half of that of the undoped Cu 3 N film and the surface is smoother.…