Browsing División de Nanociencias y Materiales by Title
Now showing items 357-376 of 528
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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 ... -
Producción y caracterización de nuevos materiales: cárbon activado y materiales mesoporosos obtenidos de frijol.
(2008)"La presente investigación consistió en fundamentar con resultados experimentales la factibilidad de utilizar vaina de frijol como materia prima en la producción de carbón activado y su aplicación en la remoción de cadmio ... -
Production of biodiesel from roasted chicken fat and methanol: free catalyst
(2014)"Transesterification reactions free of catalyst between roasted chicken fat with methanol were carried out in a batch reactor in order to produce biodiesel to temperatures from 120°C to 140°C. Parameters related to the ... -
Promotional effect of Rh nanoparticles on WO3/TiO2 titanate nanotube photocatalysts for boosted hydrogen production
(2018)"In this work, we explore the hydrogen production via the water splitting process on Rh-WO3 photocatalysts supported on nanotubes of TiO2. H2 production tests were performed in a 2-propanol-water solution. The support ... -
Propiedades estructurales y magnéticas de aleaciones subnanométricas de FePt
(2018-08)"Las nanoaleaciones binarias, compuestas por metales de transición, han sido objeto de numerosos estudios, ya que se espera que las propiedades de los elementos individuales se acoplen y potencialicen al ser mezclados. Del ... -
Propiedades fotónicas en nanoestructuras de Au y Au@SiO2
(2018-11)"La principal motivación de este trabajo de investigación es analizar e interpretar la interacción de la luz con arreglos de nanopartículas de distintas geometrías mediante cálculos en la Aproximación de Dipolo Discreto ... -
Propiedades magnéticas de agregados CoAgN(N≤6).
(2010)"El presente trabajo es un estudio de la interrelación entre las propiedades estructurales y magnéticas de agregados de plata dopados con una impureza de cobalto. Estos sistemas muestran a nivel experimental interesantes ... -
Propiedades magnéticas de agregados de metales 3d adsorbidos sobre superficies no magnéticas
(01/11/2019)The magnetic elements of the 3d row of the periodic table, have been extensively studied from an experimental and theoretical points of view. The study of these systems has been encouraged because their possible applications ... -
“Propiedades mecánicas y calóricas de cintas elaboradas por solidificación rápida de aleaciones ferromagnéticas con memoria de forma base Níquel”
(2017-08)"La refrigeración en estado sólido basada en efectos calóricos es una tecnología amigable con el medio y con una eficiencia energética mayor respecto a la convencional. Un efecto calórico es la respuesta térmica de un ... -
Pseudorandom sequences in spread-spectrum communications generated by cellular automata
(Universidad Nacional Autónoma de México, 2012)"Dynamical systems methods have been recently used in spread-spectrum digital communication systems. The expansion of the spectrum using a pseudorandom sequence with a higher frequency than the information signal is the ... -
Pure and doped boron nitride nanotubes
(2007-05)"More than ten years ago, it was suggested theoretically that boron nitride (BN) nanotubes could be produced. Soon after, various reports on their synthesis appeared and a new area of nanotube science was born. This review ... -
Pyrrolic nitrogen-doped multiwall carbon nanotubes using ball-milled slag-SiC mixtures as a catalyst by aerosol assisted chemical vapor deposition
(IOP Publishing, 2020)"We demonstrated that the ball-milled slag-SiC mixture is an effective catalyst to grow pyrrolic nitrogen-doped multiwall carbon nanotubes (N-MWCNTs) by aerosol assisted chemical vapor deposition (AACVD) method. N-MWCNTs ... -
Quantum Hamiltonians and prime numbers
(2003)"A short review of Schrödinger Hamiltonian for which the spectral problem has beenVrelated in the literature to the distribution of the prime numbers is presented here. WeVnotice a possible connection between prime numbers ... -
Radius evolution for bubbles with elastic shells
(Elsevier, 2021)"We present an analysis of an extended Rayleigh–Plesset (RP) equation for a three dimensional cell of microorganisms such as bacteria or viruses in some liquid, where the cell membrane in bacteria or the envelope (capsid) ... -
Raman spectroscopy study of heat-treated and boron-doped double wall carbon nanotubes
(2009-07)"We performed Raman spectroscopy experiments on undoped and boron-doped double walled carbon nanotubes (DWNTs) that exhibit the "coalescence inducing mode" as these DWNTs are heat treated to temperatures between 1200 C and ... -
Ramanujan sums for signal processing of low-frequency noise
(2002)"An aperiodic (low-frequency) spectrum may originate from the error term in the mean value of an arithmetical function such as Mobius function or Mangoldt function, which are coding sequences for prime numbers. In the ... -
Reactividad y propiedades catalíticas de partículas subnanométricas de Pt y FePt: un estudio basado en la teoría de la funcional de la densidad
(2015-11)"Atomic clusters constitute a new phase of matter, being the bridge between atoms and bulk. These systems have generated considerable interest, triggering one extensive research due to the fact that their physical and ... -
Reconfigurable dynamical logic gate with linear core
(2013)"A dynamically reconfigurable linear core logic gate is a device that allows logical outputs dependent upon configurable parameters set within device. The device is comprised of three blocks: The first block receives at ... -
Recrystallization of a Ti-45Ni-5Cu cold-worked shape memory alloy characterized by thermoelectric power and electrical properties
(2014)"The recrystallization of a cold-worked shape memory alloy (SMA) without R-phase transition, i.e. the Ti-45.0Ni-5.0Cu (% at.), has been studied by thermoelectric power (TEP) technique and electrical resistivity change (Dρ) ...