Materials Literature
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As demand for clean and healthy environment, people make many alternate solutions to save the environment. To save trees and overcome landfill of waste material and waste disposal by burning activities issues (cause to losing energy and increase pollution), people nowadays take recycling as a recovery. Recycling waste…
In this work, the evolution of some key physicochemical parameters of oxide engineered nanomaterial (ENM) dispersions was studied during an in vitro biological assessment. Commercial oxide ENMs, SiO 2 and TiO 2 , were dispersed in aqueous solutions (20 μg/mL) to A549 cells and N-hTERT keratinocytes and were assessed a…
Titanium and silicon dioxide nanoparticles (TiO 2 and SiO 2 NPs) are now in daily use in many commercial products of which food, sunscreens, toothpastes or cosmetics. However, their effects on human body, especially on the central nervous system, are still unclear. The aim of this study was to determine whether direct…
Systematic atomic simulations based on molecular mechanics were conducted to investigate the pull-out behavior of a capped carbon nanotube (CNT) in CNT-reinforced nanocomposites. Two common cases were studied: the pull-out of a complete CNT from a polymer matrix in a CNT/polymer nanocomposite and the pull-out of the b…
This study investigated the use of metal impurities in single-wall carbon nanotubes (SWCNT) as potential tracers to distinguish engineered nanomaterials from background aerosols. TEM and SEM were used to characterize parent material and aerosolized agglomerates collected on PTFE filters using a cascade impactor. SEM i…
Cellulose nanocrystals (CNCs) exhibit advantageous chemical and mechanical properties that render them attractive for a wide range of applications. During the life-cycle of CNC containing materials the nanocrystals could be released and become airborne, posing a potential inhalatory exposure risk towards humans. Absen…
Research about the fate and behavior of engineered nanoparticles in the environment is despite its wide applications still in the early stages. The fast-growing area of nanoparticle research and the high level of uncertainty create a big challenge for describing clearly the recent state of the current scientific knowl…
Photochemical upconversion is a regenerative process that transforms lower-energy photons into higher-energy light through two sequential bimolecular reactions, triplet sensitization of an appropriate acceptor followed by singlet fluorescence producing triplet–triplet annihilation derived from two energized acceptors.…
In the present work polyurethane foams containing various content loadings of kenaf fiber and recycled tire rubber particulates were prepared and studied, with the objective of developing alternative composite rigid foams. The influence of the filler content on the foam microstructure and its physical and mechanical b…
Thermoelectric performance of p-type skutterudites currently lags that of the corresponding n-type materials, and improvement of this important class of materials has become the focus of considerable research effort world-wide. Recent calculations find promising band structure features in p-type skutterudite materials…
Although γ-Ba 4 Nb 2 O 9 was considered to be metastable at room temperature (RT) and, therefore, prepared only by quenching from high temperatures, a new procedure for preparation of pure γ-Ba 4 Nb 2 O 9 from a single-molecular precursor, the oxalate-based complex {Ba 2 (H 2 O) 5 [NbO(C 2 O 4 ) 3 ]HC 2 O 4 }·H 2 O, i…
This paper reports the formation of Ni–CdSe core–shell structures. The Ni–CdSe core–shell structures were synthesized via a seed-mediated growth method where a CdSe shell was grown on preformed nickel core particles. The types of nickel cores include nickel nanocubes of 13 nm in size and spherical nickel nanoparticles…
2-Dimensional (2-D) TiO2 thin films and 1-dimensional (1-D) TiO2 nanotube arrays were fabricated on Si and quartz substrates using atomic layer deposition (ALD) with an anodic aluminum oxide (AAO) template at 400 °C. The film thickness and the tube wall thickness can be precisely controlled using the ALD approach. The…
In this paper, we present a comparison of profile measurements of vertical field effect transistor (FinFET) fin arrays by optical critical dimension (OCD) metrology and critical dimension small angle X-ray scattering (CD-SAXS) metrology. Spectroscopic Muller matrix elements measurements were performed at various azimu…
Magnetic properties and magnetocaloric effects of LaFe11.5−xTxSi1.5 (T = Cr, Ni; x = 0, 0.1, 0.15, and 0.2) have been investigated by magnetic measurements and differential scanning calorimetry and compared with that of Mn, Co substitution. The Curie temperatures (TC) of LaFe11.5−xCrxSi1.5 compounds are decreased from…
The charge transfer rates of a localized excited electron to graphene monolayers with variable substrate coupling have been investigated by the core hole clock method with adsorbed argon. Expressed as charge transfer times, we find strong variations between ~3 fs (on graphene "valleys" on Ru(0001)) to ~16 fs (quasi-fr…
Abstract The main objective of this research is to achieve atmospheric plasma induced graft polymerization of non‐C8 fluorocarbons onto cotton fabrics to achieve a durable nanolayer fluorocarbon coating that is water, alcohol, and oil repellent through home launderings. The influence of process parameters on the perfo…
In this research work, ferrite nanoparticles with composition of SrFe12−x(Ni0.5Co0.5Ti)x/2O19 (x = 0-2.5 in a step of 0.5) were synthesized by a reverse micelle. Multiwalled carbon nanotubes (MWCNT) were also functionalized by employing poly(acrylic acid). Then the ferrite nanoparticles were deposited on the functiona…
Kontrolle am Arbeitsplatz: Ein industrieller Methanolsynthesekatalysator wurde mit In-situ-Neutronenbeugung unter Arbeitsbedingungen bei hohen Drücken untersucht. Die besondere Mikrostruktur des Cu/ZnO/Al2O3-Nanokatalysators hat sich dabei als stabil erwiesen. Im Einklang mit der Bedeutung von Stapelfehlern für die Ka…
Systematic measurements of the surface viscosity of several nematic liquid crystals in contact with a polymercaptan layer show that the latter scales like the bulk rotational viscosity . This result is interpreted in the framework of a ‘delocalized model’ for the surface viscosity.