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Mostrando ítems 721-730 de 759
Artículo
Evaluation of the optoelectronic properties and corrosion behavior of Al2O3-doped ZnO films prepared by dc pulsed magnetron sputtering
(IOPScience, 2014)
he main requirements for transparent conducting oxide (TCO) films acting as electrodes are a high transmission rate in the visible spectral region and low resistivity. However, in many cases, tolerance to temperature and ...
Artículo
Anisotropic in-plane conductivity and dichroic gold plasmon resonance in plasma assisted ITO thin films e-beam evaporated at oblique angles
(American Chemical Society, 2015)
ITO thin films have been prepared by electron beam evaporation at oblique angles (OA), directly and while assisting their growth with a downstream plasma. The films microstructure, characterized by scanning electron ...
Artículo
Radioecological assessment and radiometric dating of sediment cores from dynamic sedimentary systems of Pra and Volta estuaries (Ghana) along the Equatorial Atlantic
(Elsevier, 2017)
The Volta and Pra estuaries (Ghana, West Africa) are dynamical sedimentary systems whose natural equilibrium is being affected by anthropogenic activities. This paper reports depth-distributions of 210Pb, 226Ra, 234Th, ...
Artículo
On the use of 210Pb-based records of sedimentation rates and activity concentrations for tracking past environmental changes
(Elsevier, 2022)
Lead-210 from natural atmospheric fallout is widely used in multidisciplinary studies to date recent sediments. Some of the 210Pb-based dating models can produce historical records of sediment accumulation rates (SAR) and ...
Artículo
Atomic-Scale Model and Electronic Structure of Cu₂O/CH₃NH₃ PbI₃ Interfaces in Perovskite Solar Cells
(American Chemical Society, 2020-09)
Cuprous oxide has been conceived as a potential alternative to traditional organic hole-transport layers in hybrid halide perovskite-based solar cells. Device simulations predict record efficiencies using this semiconductor, ...
Artículo
Multi-site H-bridge breathers in a DNA–shaped double strand
(IOP Publishing, 2004)
We investigate the formation process of nonlinear vibrational modes representing broad H-bridge multi–site breathers in a DNA–shaped double strand. Within a network model of the double helix we take individual motions ...
Artículo
Thermally induced delamination of amorphous hydrogenated carbon coatings monitored by positron beam analysis
(ScienceDirect, 2004-03)
In this work we have studied the adhesion of PVD amorphous hydrogenated carbon (a-C:H) thin coatings (<200 nm) on crystalline silicon by means of positron beam analysis (PBA). PBA allows the study of the a-C:H layer and ...
Artículo
Determination of trace element concentrations and stable lead, uranium and thorium isotope ratios by quadrupole-ICP-MS in NORM and NORM-polluted sample leachates
(Elsevier Science BV, 2012)
This works focus on the monitoring of the potential pollution in scenarios that involves NORM related industrial activities (environmental or in-door scenarios). The objective was to develop a method to determine extent ...
Artículo
Development and operational performance of a single calibration chamber for radon detectors
(Elsevier Science BV, 2007)
This work shows the design, setup and performance of a new single radon detector calibration chamber developed at the University of Huelva (Environmental Radioactivity Group). This system is based on a certified radon ...
Artículo
An assay on the effect of preliminary restoration tasks applied to a large TENORM wastes disposal in the south-west of Spain
(Elsevier Science BV, 2006)
A large industrial wastes disposal site, where two phosphate rock processing plants release their wastes, located close to Huelva town (SW of Spain) has been partially submitted to restoration as a preliminary step in a ...