Materials Literature
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Since the historical observation of single layer graphene by Germ and his co-workers in 2004, this atomically thin carbon film has received ever-increasing attention and become a rapidly rising star on the horizon of materials science and condensed-matter physics (Novoselov et al., 2004).Graphene exhibits many unusual…
Abstract SiO 2 particles prepared by Stöber method were modified using 1,3,5,7‐tetravinyl‐1,3,5,7‐tetramethylcyclotetrasiloxane (Vi‐D 4 ), and SiO 2 /polystyrene (PS) composite particles with core‐shell structure were synthesized adopting mulsion polymerization of PS in a water–ethanol medium. The products were charac…
Thermoelectric (TE) properties of skutterudites DDy(Fe1-xCox)4Sb12 for 0.2 x 0.3 were studied in the temperature range from 300 K to 800 K and compared with values for x = 0. Didymium (DD, 4.76 mass % Pr and 95.24 mass % Nd) was used as natural double filler. At Co-concentrations 0.225 x 0.25 maximum TE-perform…
This book chapter is based on the experimental activities conducted mainly at Sapienza University of Rome: Astronautic, Electric and Energetic Engineering Department in collaboration with University of Maryland, Institute for Research in Electronics and Applied Physics (IREAP). A branch of scientific research about co…
Abstract An imidazoline‐based dissymmetric bis‐quaternary ammonium gemini surfactant has been synthesized. Its surface active properties at equilibrium in water at 25 °C were determined. The inhibitive effect of the compound on Q235 steel in 1 M hydrochloric solution was investigated by the weight‐loss method, potenti…
Ensembles of alumina capped ZnO quantum dots (ZQDs) were grown using pulsed laser deposition. The ZQDs of mean radii comparable to and smaller than the pertinent excitonic Bohr radius (∼2.34 nm), called ultrasmall quantum dots, show size dependent optical absorption edges, which follow the strong confinement model. In…
Abstract Linear and heavy alkyl benzene (HAB) were sulfonated with fuming sulfuric acid (oleum) and the sulfonated products were esterified with tri and poly ethanolamine ( d = 4 and 6). The prepared three esters from each series were quaternized with n ‐butyl bromide. The resulted six quaternized ester of linear and…
Abstract Raman spectroscopy complemented with infrared spectroscopy has been used to study the rare‐earth‐based mineral decrespignyite [(Y,REE) 4 Cu(CO 3 ) 4 Cl(OH) 5 · 2H 2 O] and the spectrum compared with the Raman spectra of a series of selected natural halogenated carbonates from different origins including bastn…
The use of carbon nanohorns (SWCNHs) as a modifying filler in a polyacrylonitrile (PAN) matrix is studied with the goal of elaborating nanocomposites. The study deals with assessment of the dispersity of SWCNHs in a PAN polymer suspension. The SWCNHs were introduced into the PAN-based suspension using different method…
Nanocomposites are multiphase materials where one of the structural units, either organic or inorganic, is in a defined size range 1-100 nm. In order to prepare organic-inorganic nanocomposites either the particles or the polymers or both can be synthesized “in situ” or used in the final state. When dispersing the nan…
Herein, we utilize surface enhanced Raman spectroscopy (SERS) for the in situ analyses of catalyst structure while operating at elevated temperatures in various atmospheres. In order to accomplish this, robust SERS substrates were generated by depositing an ultrathin protective coating of alumina on top of silver nano…
Recent research revealed that using the effective medium approach to generate arbitrary multi-phase level computer-generated holograms is a promising alternative to the conventional multi-height level approach. Although this method reduces the fabrication effort using one-step binary lithography, the subwavelength pat…
Materials science continues to occupy a central place in our lives primarily through the design and creation of new materials, and our quality of life has improved over time thanks to the discovery of new materials. Major milestones in the advancement of our society are intimately associated with materials throughout…
We present a new program for conformer generation, Confab, which aims to generate diverse low energy conformers that span the space of all possible conformations. Such conformers are required for use in fields such as docking and pharmacophore searching and generation. Confab uses a torsion driving approach to travel…
Abstract The crystallization, melting behavior, and spherulitic growth kinetics of biodegradable poly(ethylene succinate‐ co ‐6 mol % butylene succinate) [P(ES‐ co ‐6 mol % BS)] were investigated and compared with those of the homopolymer poly(ethylene succinate) (PES) in this work. The crystal structure of P(ES‐ co ‐…
Cobalt-phosphorous (Co-P) was coated in alkaline solution on the E-glass fiber/fabric over a range of coating time (0–30 minutes, in intervals of 5 minutes) and temperature (50–90°C, in intervals of 10°C). The effects of coating time and temperature on the structural, compositional, morphological, thermal and magnetic…
Abstract A theoretical Raman polarization analysis is proposed for the corundum structure of sapphire (α‐Al 2 O 3 ) and validation experiments conducted with the purpose of retrieving the full set of phonon deformation potentials (PDPs). From the theoretical side, the change in force constants under stress/strain has…
The amazing technicolor dreamcoating: Multicolor superhydrophobic coating materials were synthesized by the precipitation of fatty acid-metal ion (Cu2+, Zn2+, Fe3+, Co2+, and Ni2+) complexes. All of the material surfaces showed excellent water-repellent self-cleaning properties.
Several methods have been offered for silver nanoparticles production. A new method has been developed including shape-controlled synthesis of silver nanoparticles in different shapes. Dendrite, cubic, spherical and porous structures were formed by self-arrangement of the surfactant as a template under ultrasound radi…
We model quantitatively the chemical dynamics of terra rossa formation that we deduced earlier from new field and petrographic evidence. The key phenomenon is that authigenic kaolinite (a proxy for kaolinite solid solutions and other clays) replaces limestone at a downward-moving reaction front at the base of the exis…