Materials Literature
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High density concrete is widely used in railway, crane counterweight, radiation shielding in nuclear plants or other radiation related application in medical establishment. The aim of this study is to increase the density of concrete and accomplish it by using steel treatment waste as aggregatesiron dross (mainly iron…
In this chapter, we outline the protocols for PEGylation of some drug carriers, such as dendrimer, polymeric nanoparticles, liposomes, for systemic delivery. PEGylation simply refers to the modification of particle surface by covalently grafting, entrapping, or adsorbing PEG chains of vivid length. However, limitation…
نم نكمتلا مت دقل طئلاخ ى لع لوصحلا DGEBA/Phn ةطاسوب يبقا عتلا ط لخلا ة ينقت . د قو ةسارد تمت طئلاخلا هذ هل يرارحلا ليصوتلا لماعم يرارحلا ىدملا للاخ 303-373°K و ، كلاو فونلل ةينزولا ةبسنلا ةدايز دنع يرارحلا ليصوتلا لماعم ميق يف ةدايز جئاتنلا ترهظأ ) Phn ( ، تدصرو ة يلخادلا ة يئيزجلا ةآرحلا ةدايز ةجيتن ةيلاعلا ةرارحلا ت…
Based on first-principles equation-of-state and lattice dynamics calculations, a new boron allotrope with K(4) structure is proposed, which gives the first example of a three-dimensional all sp(2) network.
Modeling elastic and thermal properties of 2.5D carbon fiber and carbon
Wetting properties of a wide range of materials can be modified by accurate laser micromachining with ultra short laser pulses. Controlling the surface topography in a micro and sub-micrometer scale allows the generation of waterrepellent surfaces, which remain dry and prevent ice accumulation under certain conditions…
We demonstrate the successful use of hard X-ray photoelectron spectroscopy (HAXPES) for selectively probing the platinum partial d-density of states (DOS) in a Pt-Cu nanoparticle catalyst which shows activity superior to pure Pt towards the oxygen-reduction reaction (ORR). The information about occupied Pt d-band stat…
Adjusting the molar ratio between α-CD and copolymer can induce supramacromolecular complexes to dynamically and reversibly self-tune their fabrication from micelles to cylinders to vesicles to sheets like “living” assemblies.
Abstract—Here we present the rigorous electrodynamical solution of diffraction problem about the microwave scattering by a multilayered cylinder. The number and thickness of layers is not limited. We offer the solution when the central core of multilayered cylinder can be made of different isotropic materials as a met…
Block copolymer vesicles containing paramagnetic lanthanide complexes represent a versatile class of MRI contrast agents. By exploiting the water flux across the membrane, these nanovesicles can be employed as T1- and CEST MRI contrast agents. The incorporation of paramagnetic amphiphilic lipids (Gd-1 for T1 MRI CAs a…
We investigate the microstructure and dynamic behavior of diblock copolymer/nanoparticle composites under electric fields by a series of cell dynamical system simulations. The study focuses on the effects of two factors, i.e., the electric field strength and the polymer/nanoparticle coupling interaction strength. Our…
This paper reports the facile preparation of gels of guar gum (GG) with an ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl), from the solutions of GG in BMIMCl in various concentrations by heating–cooling process. The mechanical properties of the gels were evaluated by stress–strain curves under both compre…
The excitation of an antisymmetric trapped mode on a symmetric metamaterial resonator is experimentally demonstrated.We use an active electronic device to break the electrical symmetry and therefore to generate this trapped mode on a symmetric spilt ring resonator.Even more, with such a tunable mode coupling resonator…
The vibrational properties of the trimeric iron complex [Fe(3)(4-(2'-hydroxy-ethyl)-1,2,4-triazole)(6)(H(2)O)(6)](CF(3)SO(3))(6) which serves as a model of the 1D iron coordination polymers based on 1,2,4-triazoles have been investigated by nuclear inelastic scattering of synchrotron radiation (NIS), as well as by Ram…
New layered hybrid organic-inorganic materials were obtained directly by hydrolysis and polycondensation of monosilylated precursors of type (EtO)(3)Si(CH(2))(3)NH(C=O)NHC(n)H(2n+1) (n = 3, 8, 12 and 16). These precursors were easily prepared by reaction between commercially available triethoxysilylpropylisocyanate an…
The impact of high-intensity laser radiation on a polymer in vacuum is accompanied by the release of gaseous products of degradation and, in some cases, of clusters of the partially destroyed polymer. Polytetrafluoroethylene (PTFE) exhibits an abnormal behavior in this process: being exposed to continuous CO 2 laser r…
We describe the preparation of magnetic silica nanocomposite millimetric beads using alginate as a green biopolymer template. The simple and soft method which is used here is particularly suitable since the alginate template allows a multiscale control of the structure of the material, both its morphological character…
Structural investigation of the coil–rod–coil molecules reveals that side chains, methyl and ethyl groups in the middle of the rod segment, dramatically influence the self-assembly behavior.
The binding energies of multiple CO molecules to five-atom silver-gold cluster cations have been obtained employing temperature dependent gas phase ion trap measurements and ab initio calculations. The CO binding energies to Ag(n)Au(m)(+) (n + m = 5) decrease with increasing number of silver atoms. Most strikingly, af…
Synthesis of new heterometallic layered magnets with controlled chirality have been achieved by insertion of chiral and non-chiral salen-type Ni(II) complexes into copper and cobalt layered simple hydroxides.