Materials Literature
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The interaction of emeraldine base (PANI-EB) with silver and gold colloids was probed by using Surface-Enhanced Resonance Raman Scattering (SERRS) at 3 different exciting radiations. Due to the great sensitivity of SERRS technique the detection limit of PANI-EB concentration was ca. 2 x 10(-7) mol L(-1) in Ag and Au c…
Abstract This paper describes the isolation of four layered double hydroxide (LDH) compounds having the general formula[Ni II 3– x Cr III x (OH) 6 ](CO 3 ) x /2 · y H 2 O [ x = 0.57 ( 1 ), 0.69 ( 2 ), 0.81 ( 3 ) and 0.93 ( 4 )] by using homogeneous precipitation methods and varying the metal ratio in the synthetic sol…
Insulated polyaniline (PANI) polyrotaxane molecular wires were synthesized to apply them as advanced materials in photovoltaic devices and light emitting diodes. Benzylamine-substituted polyaniline is constructed through the synthesis and deprotection of tert-butoxycarbonyl (Boc) protected PANI using Pd-catalyzed poly…
The present work is a systematic numerical study of the thermal properties of single-walled carbon nanotubes (SWNTs) in suspensions. A computational model, based on the simulation of the random movement of Brownian thermal walkers in aqueous and in oil suspensions of SWNTs, was used to investigate the effect of the SW…
A series of isostructural M(mu-OH(2))(2)[Au(CN)(2)](2) (M = Co, Fe, and Mn) coordination polymers was synthesized from the reaction of M(II) with [(n)Bu(4)N][Au(CN)(2)]. The basic structural motif for these polymers is analogous to that of previously reported Cu(II)- and Ni(II)-containing polymers and contains repeati…
In this work, the synthesis of porous TiN/carbon composites via “reactive hard templating” is presented. The concept of this synthesis strategy is to use the template, responsible for the final morphology of the TiN/carbon material, as a reactant and nitrogen source; template removal is unnecessary as the final produc…
Multicolor fluorescent containers: A silica coating procedure has been devised for the preparation of multifluorescent dye-loaded zeolite L crystals with luminescent anisotropic cores and isotropic shells. The method comprises a combination of the polyelectrolyte layer-by-layer technique and Stöber synthesis (see sche…
The orthophosphate phosphors, Ba3La(PO4)3 activated with Dy3+ and Gd3+-Dy3+ ions, were prepared by a solid reaction technique at high temperature. Their spectroscopic properties were investigated in the vacuum ultraviolet (VUV)-visible range. We found that the introducing of Gd3+ greatly enhances the Dy3+ luminescence…
In the present paper, we report a simple approach for creating a nanocrystalline layer on the surface of stone wool fibers (SWFs) with a basalt‐like composition. The approach is based on a preoxidation process of the SWFs in atmospheric air at a temperature around the glass transition temperature ( T g ) for various d…
YNbO 4 and YNbO 4:RE (RE = Er 3+, Sm 3+, Tb 3+, and Tm 3+ ) nanophosphors have been prepared using a citrate-gel combustion procedure. The results of X-ray diffraction reveal that the YNbO 4 samples crystallized in both monoclinic and tetragonal phases in the investigated temperature range. The excitation spectra of t…
The purpose of this study was to compare the frictional properties of four self-ligating metal brackets, Speed, Damon 2, In-Ovation, and Time, with those of three conventionally ligated metal brackets, Time, Victory Twin, and Discovery. The self-ligating Time bracket can also be used as a conventionally ligated bracke…
Abstract Chitosan–poly(acrylic acid) polyelectrolyte complex nanoparticles were prepared by coacervation under mild experimental conditions without the use of any organic solvents or surfactants. The influence of some experimental parameters such as the pH of the polyelectrolyte solutions, their concentrations, and th…
Abstract A photosensitive epoxy resin was synthesized from bis(4‐hydroxy ‐3‐methoxy benzylidene) acetone and epichlorohydrin using solution polycondensation method. The prepared epoxy resin was characterized by UV, IR, 1 H NMR, and 13 C NMR spectroscopy. The thermal stability of the epoxy resin was assessed by thermog…
High quality films of polythiophene with different alkyl side chains were successfully synthesized by a novel method in the presence of sodium dodecylbenzenesulonate (SDBS) under N 2 atmosphere on the PTFE (polytetrafluorethylene) substrate. The as-prepared films were characterized by scanning electron microscopy (SEM…
Multiwalled carbon nanotubes (MWCNTs) are considered to be ideal multifunctional materials for biorelated applications, but there is still some controversy regarding their toxicity. In addition, the poor dispersibility of MWCNTs in either water or organic solvents has limited their practical applications. Therefore, o…
Trimethylsilylation of cellulose in different 1,3-dialkylimidazolium ionic liquids (IL) with hexamethyldisilazane (HMDS) as a silylating agent was investigated. Trimethylsilyl (TMSi) cellulose with a degree of substitution (DS) greater than 1 is insoluble in the IL. The maximum DS obtained depends on the nature of the…
The fracture toughness of four different silicon carbides was measured using single‐edge precracked beam (SEPB) and indentation/strength techniques. Two were development grades with similar microstructures and chemistries, and yet exhibited different fracture modes. The grade that exhibited a predominantly intergranul…
Abstract The local structure of Ba(Ti 0.70 ,Sn 0.30 )O 3 (BSnT) was investigated using micro Raman spectroscopy from 80 to 500 K, which indicated three local phase sequences. The dielectric spectroscopy studies illustrated freezing of polar nano‐regions (PNR) below 95 K, merger of frequency dispersion at 220 K, and th…
Temperature-dependent reflectivity spectra of a multiferroic hexagonal ${\text{YMnO}}_{3}$ single crystal were measured with polarized light in the ferroelectric phase. The phonon parameters for both $E\ensuremath{\parallel}c$ and $E\ensuremath{\perp}c$ polarizations are obtained by fitting the dielectric function to…
The geometrical, electronic and optical properties of alpha,alpha'-quater(3,4-ethylenedioxythiophene) (4EDOT) and alpha,alpha'-quater(thiophene) (4T) are studied by quantum-chemical calculations; the computed vibronic spectra at low and room temperature (RT) are compared to experiment. Our results suggest that the bet…