Materials Literature
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We present predictions of thermoelectric figure of merit (ZT) on Si/Ge superlattice nanowires (SLNWs) based on ab initio electronic structure calculations and Boltzmann transport theory. Our results suggest that Si/Ge SLNW is a promising candidate for thermoelectric applications, much better than the known Si nanowire…
Air permeability is one of the important properties which affect the performance of nonwovens used for filtration, insulation and drainage applications. In this study, an analysis on the air permeability of the polyester/viscose blended needle-punched nonwovens has been carried out. In addition, a mixture-process cros…
Abstract Waxy corn starch (amylopectin) and three of its chemical derivatives: acetylated cross‐linked (ACLS), oxidized (OS), and octenyl‐succinylated (OSA), were used together with additives such as Tween 80, sorbitol, and beeswax suspension or safflower oil to test their effect on film‐forming solutions (FFS) and fi…
A MnO2/carbon nanotube (CNT) nanocomposite was synthesised using a simple hydrothermal treatment. The nanocomposite exhibits a CNT core/MnO2 porous sheath hierarchy architecture, which makes it promising as an electrode material for supercapacitors. An asymmetric supercapacitor based on activated carbon (AC) as anode,…
Os objetivos da pesquisa foram produzir chapas de partículas com resíduos do processamento da madeira de Pinus elliottii coladas com resina poliuretana à base de mamona e avaliar o efeito da combinação da pressão e temperatura na qualidade das chapas produzidas. Para tanto, foram confeccionadas 12 chapas, subdivididas…
Electrochromic (EC) devices for use as smart windows have a large energy-saving potential when used in the construction and transport industries. When upscaling EC devices to window size, a well-known challenge is to design the EC device with a rapid and uniform switching between colored (charged) and bleached (discha…
Molecular dynamics simulations of nanocrystalline FCC metals revealed the strain rate dependence to be reflected in the critical resolved shear stresses for dislocation propagation. The strain rate and temperature dependence study is complemented by a stress and grain size dependence supporting consistently the import…
This work addresses the development of an advanced modeling tool which describes the full nonlinear coupling in three-dimensional (3D) Galfenol transducers to provide system level input–output relationships. Maxwell's equations for electromagnetics and Navier's equations for mechanical systems are formulated in weak f…
Chlamydia trachomatis is a medically important pathogen that encodes a relatively high percentage of proteins with unknown function. The three-dimensional structure of a protein can be very informative regarding the protein's functional characteristics; however, determining protein structures experimentally can be ver…
Porous anodic alumina (PAA) is a well-defined material that has found many applications. The range of applications toward sensing and recognition can be greatly expanded if the alumina surface is covalently modified with an organic monolayer. Here, we present a new method for the organic modification of PAA based on t…
Abstract Flame retardancy for thermoplastics is a challenging task where chemists and engineers work together to find solutions to improve the burning behavior without strongly influencing other key properties of the material. In this work, the halogen‐free additives aluminum diethylphosphinate (AlPi‐Et) and a mixture…
We propose a novel and robust strategy for creating continuous conducting polymer films with ultralow percolation thresholds using polymer-coated gold nanoparticles (Au NPs) as surfactant. Continuous poly(triphenylamine) (PTPA) films of high internal phase polymeric emulsions were fabricated using an assembly of cross…
A 6-hydroxyindole-based BODIPY, named BODIPY-OH, with distinct spectroscopic characteristics is reported. Through a systematic study of the spectroscopic characteristics of BODIPY-OH and BODIPY-O(-) in various solvents containing an organic base, we found that the light-color of the fluorophore can be tuned over a wid…
Abstract A series of polyhedral oligomeric silsesquioxane (POSS) based hybrid copolymers poly(POSS‐co‐methyl methacrylate −co‐ 4‐vinylbenzyl fluoroether carboxylate) ( P(POSS‐MMA‐VBFC) ) were prepared via radical polymerization and characterized by nuclear magnetic resonance, fourier transform infrared spectroscopy, t…
Graphene sheets are an ideal carbon material with the highest area available for electrolyte interaction and can be obtained by reducing graphite oxide (GO). This study presents the photocatalytic reduction of GO in water with mercury-lamp irradiation. The specific capacitance of the reduced GO in an H 2 SO 4 aqueous…
Despite the recent advances in the chemical vapor deposition (CVD) of graphene, it is still a great challenge to control the thickness of graphene especially in real-time during the growth. So far, there are no reports on the real-time monitoring of graphene growth. Here, we show for the first time real-time in situ k…
The nematic phase of liquid crystals (LC), used in most LC display applications, is a fluid state formed by orientationally ordered molecules. The direction of their alignment, and hence the overall optical response of the material, is easily modified by the application of an electric field and elastically relaxes bac…
Abstract Some issues related to the modelling of the powder diffraction pattern of a nanocrystalline material are proposed. Serious misunderstanding of the results can occur when the peak profiles are not correctly considered in reciprocal space, or when the subtle details of the peak shape due to the peculiar microst…
The aim of this study was to understand the effects of braid pattern and the number of layers on three-dimensional (3D) braided unit cell structures. Various unit cell-based representative 3D braided preforms were developed. Data generated from these structures included unit cell dimensions, yarn angle, and yarn lengt…
The world market of lactic acid is growing every year, mainly as a solvent and precursor to poly(lactic acid) (PLA). The cost of renewable biomass-derived PLA will have to compete with other synthetic polymers, if it is to grab a significant and sustainable fraction of the market share. It is thus necessary to have ef…