In this work, we synthesized ZnO nanorods by a wet chemical process. By varying different parameters of the synthesis process like precursor concentration, solvent used, surfactant, temperature, and reaction time, were able to control aspect ratio (l/d) sharpness factor (Sf = h/b) rods. Rods with an ∼20 10 repeatedly obtained characterized from scanning electron microscopy. High-resolution transmission microscopy dark field analysis revealed that grow as single crystal along c axis [0001]....

Lately, the development of green chemistry methods with high efficiency for metal nanoparticle synthesis has become a primary focus among researchers. The main goal is to find an eco-friendly technique production nanoparticles. Ferro- and ferrimagnetic materials such as magnetite (Fe3O4) exhibit superparamagnetic behavior at nanometric scale. Magnetic nanoparticles have been gaining increasing interest in nanoscience nanotechnology. This attributed their physicochemical properties, particle...

In this work, bismuth nanoparticles were synthesized when a precursor, sodium bismuthate, was exposed to an electron beam at room temperature in transmission microscope (TEM). The irradiation effects investigated situ using selected-area diffraction, high-resolution microscopy and x-ray energy dispersive spectroscopy. After the irradiation, with rhombohedral structure diameter of 6 nm observed. average particle size increased time. electron-induced reduction is attributed desorption oxygen...

By way of the sol–gel chemical synthesis method, it is possible to synthesize SiO2 nanoparticles with a defined specific particle size, surface area, and crystal structure that can be effectively used as nanoadsorbent remove various organic dyes. were synthesized by method using sodium silicate (Na2SiO3) green without tetraethyl orthosilicate (TEOS) precursor, which very expensive highly toxic. This process involves formation colloidal suspension (sol) solid gelation form network in...

Concrete is the most used construction material, needing large quantities of Portland cement. Unfortunately, Ordinary Cement production one main generators CO2, which pollutes atmosphere. Today, geopolymers are an emerging building material generated by chemical activity inorganic molecules without addition. The common alternative cementitious agents in cement industry blast-furnace slag and fly ash. In present work, effect 5 wt.% µ-limestone mixtures granulated ash activated with sodium...

The interactions of Pt nanoparticles, deposited by evaporation onto highly oriented pyrolytic graphite surfaces modified kiloelectronvolt Ar+ beam treatment, have been studied X-ray photoelectron spectroscopy core-level line shape analysis. C1s and Pt4f7/2 peaks were each considered to be composed one asymmetric peak, changes in their asymmetry parameters used study interfacial interactions. In addition these changes, strong signal intensity with time found for both the Pt4f peaks,...

In the present work, reduced graphene oxide was obtained by green synthesis, using extracts of Larrea tridentata (gobernadora) and Capsicum Chinense (habanero). Graphene synthesized modified Hummers' method subsequently natural to obtain a stable environmentally friendly precursor. Consequently, gobernadora aqueous extract found have better reducing power than habanero extract. This opportunity for synthesis allows application RGO in photocatalysis degradation methylene blue dye. Degradation...

An alternative approach to reducing the clinker factor, i.e., worldwide CO

The climatic chambers are enclosures that provide a desired climate regardless of the outside environment. They frequently used in research and industry, durability testing materials, devices or appliances. FIME-UANL developed chamber, it is located climate-controlled laboratory. This chamber has facility electronic expansion valve (EEV), hot gas bypass (EHGB), pressure regulating (EPR). goal this work to develop implement control algorithms, improve performance cooling system without...

The morphological characteristics of ZnO nanostructures were systematically studied from dense rods to flower-like shapes.The samples prepared by direct decomposition a Zn(OH) 4 2-precursor and the sequential nucleation growth method consisted multistep synthesis complex nanostructured films.Condition-dependent experiments compared as reveal formation detailed process nanosized crystallites aggregates.X-ray diffraction, transmission scanning electron microscopy indicated that precursor,...

Agave salmiana ash and poultry eggshell powder as CaO sources were used for obtaining nanostructured hydroxyapatite (HAP). The synthesis was carried out by the Green Chemistry Hydrothermal Biosynthesis at 180°C with a pH of 5, reacting from Salmiana Eggshell powder, dibasic calcium phosphate (CaHPO4•2H2O) in an aqueous solution, Aloe barbadensis extract. product characterized X-ray diffraction, Fourier-transform infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Transmission...

We present experimental and numerical results of simultaneous surface plasmon polariton (SPP) excitation in-plane manipulation with random arrays gold nanoparticles. The recorded images were obtained by using leakage radiation microscopy (LRM) for the wavelength 633 nm different densities particles. model makes use a composed analytic Green dyadic which takes into account near- far-field regions, latter being approximated part describing scattering via SPP. LRM optical are related to...

High resolution transmission electron microscopy analysis of two‐layered graphene yielded Moiré patterns induced by Pt atoms/clusters located at the top one layers, which rotation between planes. The rotations measures varied three and five degrees. Theoretical was performed using an extended Hückel tight‐binding scheme on with either containing two‐carbon atom vacancies or two atoms, a cluster 6 atoms 13 layers. In most cases, system remains semimetallic, except when surface For this case,...

In this work, the risk-sensitive optimal control equations for polynomial stochastic systems of third degree with exponential criterion to be minimized and parameter diffusion into state has been applied Fitz Hugh-Nagumo (Bon Hoeffervan der Pol) model. This model represents an excitable system driven noise, which could associated diverse processes, from kinetic one chemical reactions physics solid up biological. some applications model, supervenience depends maintaining certain noise...

The properties of high-performance concretes obtained by the internal curing technique were studied in fresh and hardened states.In some concrete mixtures, fine normal weight aggregates replaced with lightweight (LWA) at 20 % vol.and ordinary portland cement was pulverized class F fly ash mass.Additionally, mixtures prepared including a shrinkage-reducing admixture, either as part mixing water or pre-soaked into aggregates.The subjected to degradation tests, such accelerated carbonation...