Materials Literature
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Phosphate conversion coatings on the rebar surfaces with oxide scale (OS) and without oxide scale (WOS) have been tried with or without addition of n-silica particles as an additive to check the effect of n-silica on phosphating behaviour of rebar. All the phosphate coatings were characterised using SEM–EDS, XRD, Tafe…
Irradiated fuel pellets present radial gradient porosity. CeO2 has been proven as a surrogate material to understand irradiated mixed oxide (MOX) due to its similar structural and mechanical properties. A novel compaction device was developed to produce CeO2 cylindrical pellets with controlled radial porosity. Three b…
Nanophytosynthesis of silver nanoparticles by plant-mediated hydromethanolic extract from Hypericum scabrum seeds and investigation of those physicochemical properties and antimicrobial activity are reported. The nanoparticles were analyzed and characterized by UV-Vis, X-ray diffraction (XRD), transmission electron mi…
The chemical modification of starch from physiologically immature bananas (Musa paradisiaca L.) was performed via the in situ polymerization of ϵ-caprolactone (CL) utilizing ammonium decamolybdate as a catalyst to obtain a starch-g-PCL copolymer in one step. The copolymerization conditions were studied by varying the…
Protein entrapment within silica matrices during sol–gel formation is an effective way of producing biocatalysts with high load, activity retention, and minimal leaching. On the other hand, mesoporous silica materials have been favored for diffusional control of protein delivery because of their regular pore size and…
The thermal buckling analysis of nanoplates is based on nonlocal elasticity theory with four-unknown shear deformation theory resting on Winkler–Pasternak elastic foundation. The nanoplate is assumed to be under three types of thermal loadings, namely uniform temperature rise, linear temperature rise, and nonlinear te…
We perform atomistic simulations of nanoindentation on Lennard–Jones 2D hexagonal crystals. In this work, we find a new spatially extended buckling-like mode of instability, which competes with the previously known instability governed by dislocation-dipole nucleation. The geometrical parameters governing these instab…
Waste water treatment reservoirs are contaminated with many hazardous chemicals and acids. Reservoirs typically comprise concrete and reinforcement steel bars, and the main elements responsible for their deterioration are hazardous chemicals, acids, and ozone. Currently, a variety of techniques are being used to prote…
This paper reviews recent studies done in academia or industrial laboratories on polymer nanocomposites based on various type of polyolefins like homopolymers, copolymers and polyblends reinforced with various mineral (montmorillonite, bentonite, closite, laponite, layered double hydroxide, etc.) carbon based (graphit…
In the present study, the surface effect on the forced vibration of a double, single-walled carbon nanotube system (DSWNTS) under excitation of a moving nanoparticle is analyzed based on the modified nonlocal elasticity theory. The nanotube surroundings are modeled by an elastic medium and it is assumed that two nanot…
The separation and purification of important biomolecule deoxyribonucleic acid (DNA) molecules are extremely important. The adsorption technique among these methods is highly preferred as the adsorbent cryogels are pretty much used due to large pores and the associated flow channels. In this study, the adsorption of D…
In this study, the influence of the size on the electronic properties (e.g. electronic energy) of three nanometal oxides: ZnO, TiO 2 , and Al 2 O 3 were investigated. The wurtzite, rutile and corundum type of clusters were selected to represent ZnO, TiO 2 , and Al 2 O 3 , respectively. To study the effect of the size…
Mixed oxide catalysts derived from hydrotalcites were applied to model biogas reforming (CH4:CO4 = 1.5:1). Nix/MgAl and Nix/MgAlCe (x = 10% or 25% w/w nominal nickel content) were prepared by the coprecipitation method. Both Ni10%/MgAl and Ni10%/MgAlCe catalysts showed potential for syngas production due to their stab…
Partially acetylated chitosan oligosaccharides (paCOS) are potent biologics with many potential applications, and their bioactivities are believed to be dependent on their structure, i.e., their degrees of polymerization and acetylation, as well as their pattern of acetylation. However, paCOS generated via chemical N-…
Co-deformation behavior is a key issue for plasticity stability of heterogeneous nanolayered materials. Using indentation testing, we investigated the plastic deformation behavior of a Cu–Au nanolayered composite (NLC) with an individual layer thickness of 50 nm. We found that the softer Au layer exhibited less deform…
A magnetic skyrmionium is a nontopological soliton, which has a doughnut-like out-of-plane spin texture in thin films, and can be phenomenologically viewed as a coalition of two topological magnetic skyrmions with opposite topological numbers. Due to its zero topological number ($Q=0$) and doughnut-like structure, the…
Single phase polycrystalline sample of perovskite Sr2TiMnO6 (STMO) has been successfully synthesized via solid state reaction route. Its detailed structural and physical properties have been studied using x-ray diffraction, transmission electron microscopy, magnetization, specific heat, and dielectric measurements. Ri…
Topological phases of matter are usually realized in deconfined phases of gauge theories. In this context, confined phases with strongly fluctuating gauge fields seem to be irrelevant to the physics of topological phases. For example, the low-energy theory of the two-dimensional (2D) toric code model (i.e. the deconfi…
Crystalline 3-D materials bearing interlinked domains of differential porosity and functionality offer the potential for organizing and shuttling molecular and nanoscale matter to specific locations within 3-D space. Here, we present methods for creating prototype MOF materials that have such structural features. Spec…
Modélisation moléculaire de la réactivité de GABA-AT : de petits modèles représentatifs à la protéine complète, de la mécanique moléculaire à la chimie quantique, du statique au dynamique La compréhension des enzymes et de leurs mécanismes catalytiques est d'une grande importance dans le développement de médicaments p…