Buscar
Mostrando ítems 121-130 de 252
GaN haeckelite single-layered nanostructures: monolayer and nanotubes
(2015-12)
"Nowadays, III-V semiconductors are interesting candidate materials for the tailoring of two dimensional (2D) graphene-like structures. These new 2D materials have attracted profound interest opening the possibility to ...
Transformación magneto-estructural y efecto magnetocalórico en aleaciones Mn1−xCrxCoGe (x = 0.04, 0.11) y MnNiGe1.05 obtenidas por solidificación rápida
(2015-06)
"En la presente tesis se estudia el efecto magnetocalórico (EMC) en cintas de aleaciones Mn1-xCrxCoGe para x=0.04, 0.11 y MnNiGe1.05 obtenidas por enfriamiento ultrarrápido empleando la técnica de temple rotatorio. Las ...
Simulating unusual phenomena in low dimensional systems
(2011-12)
"This thesis deals with physics phenomena in low dimensional systems, i.e., systems that range between few atoms and the bulk. The work deals with well studied (in this sense, classical) phenomena such as quantum tunneling ...
Síntesis de nanopartículas metálicas y su aplicación en la reducción de 4-nitrofenol por un consorcio microbiano anaerobio
(2014-12)
"Las nanopartículas metálicas de paladio pueden actuar como catalizadores y modificando los catalizadores con la adición de un segundo metal como el cobre aumentan el rendimiento de las reacciones. Para el tratamiento de ...
Surface modified semiconductors with metal nanoparticles: photocatalysts with high activity under solar light
(2016-05)
"La modificación del TiO2-P25, con uno o dos-metales, han atraído una considerable atención en los últimos años, como una clase de catalizadores y photocatalizadores altamente activos bajo la radiación UV y la luz visible. ...
On the kinetic arrest of martensitic transformation in Ni-Mn-In melt-spun ribbons
(2017)
"Kinetic arrest (KA) of martensitic transformation (MT) has been observed in as-solidified Ni52.2Mn34.3In13.5 melt-spun ribbons; a characterization by dc magnetization measurements was carried out. These alloy ribbons ...
Magnetic matrices used in high gradient magnetic separation (HGMS): a review
(2017)
"HGMS is effective in separating or filtering fine and weakly magnetic particles and widely applied in mineral processing, water treatment, cell and protein purification. The magnetic matrix is a crucial device used in ...
Influence of Fe doping and magnetic field on martensitic transition in Ni–Mn–Sn melt-spun ribbons
(Elsevier, 2016-04)
"Mn-rich Ni-Mn-Sn metamagnetic shape memory alloys exhibiting magnetostructural transformation are of a great potential as the base materials for solid-state refrigeration. With the aim of fine tuning of the transformation ...
Enhanced refrigerant capacity in Gd-Al-Co microwires with a biphase nanocrystalline/amorphous structure
(2016-02)
"A class of biphase nanocrystalline/amorphous Gd(50+5x)Al(30-5x)Co20 (x = 0, 1, 2) microwires fabricated directly by melt-extraction is reported. High resolution transmission electron microscopy and Fourier function transform ...
High-quality InN films on MgO (100) substrates: the key role of 30 degrees in-plane rotation
(2014-05)
"High crystalline layers of InN were grown on MgO(100) substrates by gas source molecular beam epitaxy. Good quality films were obtained by means of an in-plane rotation process induced by the annealing of an InN buffer ...