Browsing División de Nanociencias y Materiales by Title
Now showing items 337-356 of 526
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Parametric oscillators from factorizations employing a constant-shifted Riccati solution of the classical harmonic oscillator
(Elsevier, 2011)"We determine the kind of parametric oscillators that are generated in the usual factorization procedure of second-order linear differential equations when one introduces a constant shift of the Riccati solution of the ... -
Perceptual security of encrypted images based on wavelet scaling analysis
(2016)"The scaling behavior of the pixel fluctuations of encrypted images is evaluated by using the detrended fluctuation analysis based on wavelets, a modern technique that has been successfully used recently for a wide range ... -
Periodic Sturm-Liouville problems related to two Riccati equations of constant coefficients
(Elsevier, 2010)"We consider two closely related Riccati equations of constant parameters whose particular solutions are used to construct the corresponding class of supersymmetrically-coupled second-order differential equations. We solve ... -
Phase transformation and magnetocaloric effect of Co-doped Mn–Ni–In melt-spun ribbons
(American Institute of Physics, 2020)"Ribbon-shaped magnetocaloric materials are favorable to achieve high heat-transfer efficiencies due to their large specific surface area. In this work, Mn50Ni41−xIn9Cox (0 ≤ x ≤ 4) ribbons were prepared using a melt-spinning ... -
Phase transition and magnetocaloric properties of Mn50Ni42−xCoxSn8 (0 ≤ x ≤ 10) melt-spun ribbons
(International Union of Crystallography, 2018)"The characteristics of magnetostructural coupling play a crucial role in the magnetic field-driven behaviour of magnetofunctional alloys. The availability of magnetostructural coupling over a broad temperature range is ... -
Phase transition systematics in BiVO4 by means of high-pressure-high-temperature Raman experiments
(American Physical Society, 2018)"We report here high-pressure-high-temperature Raman experiments performed on BiVO4. We characterized the fergusonite and scheelite phases (powder and single crystal samples) and the zircon polymorph (nanopowder). The ... -
Photo-assisted inactivation of Escherichia coli bacteria by silver functionalized titanate nanotubes, Ag/H2Ti2O5H2O
(2017)"One-dimensional titanate nanotubes (H2Ti2O5·H2O) functionalized with silver nanoparticles (AgNPs) exhibited unique properties for the effective inactivation of the Gram-negative Escherichia coli within 45 minutes under ... -
Photoanodes modified with reduced graphene oxide to enhance photoelectrocatalytic performance of B-TiO2 under visible light
(2015)"The effect of reduced graphene oxide (rGO) content in boron-modified TiO2 nanocrystalline films on their photocatalytic activity in phenol oxidation is investigated. Visible-light-active TiO2 modified photoanodes were ... -
Photocatalytic properties of BiOCl-TiO2 composites for phenol photodegradation
(Elsevier, 2018)"BiOCl-TiO2 composites were synthesized by sol-gel method; using two commercial BiOCl (P2600 and SB) with different BiOCl-TiO2 weight ratios. They were characterized by different techniques such as X-ray diffraction (XRD), ... -
PI-controlled bioreactor as a generalized Liénard system
(Elsevier, 2007)"It is shown that periodic orbits can emerge in Cholette’s bioreactor model working under the influence of a PI-controller. We find a diffeomorphic coordinate trans-formation that turns this controlled enzymatic reaction ... -
Pine-tree-like morphologies of nitrogen-doped carbon nanotubes: Electron field emission enhancement
(2014)"Nitrogen-doped multiwalled carbon nanotube (CNT) bundles exhibiting pine-tree-like morphologies were synthesized on silicon-silicon oxide (Si/SiO2) substrates using a pressure-controlled chemical vapor deposition process. ... -
Planar motion with Fresnel integrals as components of the velocity
(Sociedad Mexicana de Física, A.C., 2020)"We analyze the two-dimensional motion of a rigid body due to a constant torque generated by a force acting on the body parallel to the surface on which the body moves extending an old note of Ferris-Prabhu [Am. J. Phys. ... -
Planeación en la era de las pandemias; una visión de futuro
(Academia Mexicana de Ciencias, 2020)"La pandemia ocasionada por el SARS-CoV-2 ha puesto al mundo entero al borde del colapso económico y de salud. Sorprende la falta de previsión en muchos países, México entre ellos. Tenemos la certeza de que otros eventos ... -
Plasmonic sensing of aqueous-divalent metal ions by biogenic gold nanoparticles
(Hindawi Publishing Corporation, 2019)"The chemical interaction between biogenic gold nanoparticles (AuNPs) and several metal (II) ions can be regarded as a practical, twofold, colorimetric, and plasmon resonance sensing method for the recognition of some ... -
Platinum nanoclusters in silica: Photoluminescent properties and their application for enhancing the emission of silicon nanocrystals in an integrated configuration
(2016-09)"We studied photoluminescence of ion implanted platinum nanoclusters embedded in silica. Pt ions were implanted at 2 MeV and the Pt nanoclusters were then nucleated by thermal treatment under either argon, air, or a reducing ... -
Polystyrene grafting of CNx nanotubes for the elaboration of polystyrene-based nanocomposites.
(2007)"This thesis is concerned to the development of novel engineered surface materials using nitrogen-doped carbon nanotubes (CNx) that were grafted with polystyrene (PS) chains using in situ radical polymerization controlled ... -
Practical mediated-assembly synthesis of silver nanowires using commercial Camellia sinensisextracts and their antibacterial properties
(2018)"Camellia sinensis is a well-known plant used for health purposes due to its high phenolic compound content and antioxidant properties. For the first time, the infusion of green tea has allowed the growth and stabilization ... -
Predicción de parámetros estructurales para membranas de Polisulfona, mediante modelos de Diseño de Experimentos y Aprendizaje de Máquina.
(2022-04)"Actualmente enfrentamos una crisis del agua muy grave, que nos obliga a buscar múltiples soluciones a dicho problema. Una de ellas es filtrar el agua para reutilizarla, y para ello se han usado membranas con distintos ... -
Preparación de materiales compuestos mediante la funcionalización covalente de nanotubos de carbono (CNTs) con polímero
(2013-02)"En este trabajo de tesis doctoral estudiamos la preparación de nanocompositos de nanotubos de carbono (CNTs) y polímero mediante la funcionalización covalente de CNTs por adición alquílica, usando la reacción de sales de ... -
Producción de nanoestructuras de carbono con morfología controlada y sus aplicaciones
(2013-08)"In this work we report the results of the synthesis and characterization of different carbon nanostructures with controlled morphology by modified chemical vapor deposition (CVD). The CVD modifiable parameters are: the ...