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Amorphous WO_(3-x)thin films with color characteristics tuned by the oxygen vacancies created during reactive DC sputtering

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journal of Materials Science & Technology 2021年第19期78卷 223-228页

作者： C.Guillén j.herrero Departamento de Energia(CIEMAT) Avda.Complutense 40.28040 MadridSpain

Tungsten oxides are interesting for a variety of applications due to their versatile optoelectronic characteristics,which can be tuned changing the composition and/or the crystalline *** due to sub-bandgap absorption is often achieved by ion intercalation or doping in WO_(3):M films(with M=H^(+),Li^(+),Na^(+),*** extra electrons),but a more direct way is creating charged oxygen vacancies(V_O^(+)and/or V_O~(2+))in sub-stoichiometric WO_(3-x)***,amorphous WO_(3-x)thin films are obtained by reactive DC sputtering of a pure W target,on unheated glass substrates,changing the oxygen to argon pressures *** control of intrinsic defects(oxygen vacancies and tungsten valence states)by the oxygen partial pressure allows tuning the morphology,sub-bandgap absorption and carrier density in these WO_(3-x)films,as it is proven by Raman spectroscopy,atomic force microscopy,optical spectrophotometry and Hall effect measurements.

关键词： Metal oxide Stoichiometry Optical absorption Electrical conductivity

P-type SnO thin films prepared by reactive sputtering at high deposition rates

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journal of Materials Science & Technology 2019年第8期35卷 1706-1711页

作者： C.Guillén j.herrero Department of Energy CIEMATAvda. Complutense 40Edif. 42Madrid28040Spain

SnO is an ideally suitable p-type conductive material, with large hole mobility, and has attracted great interest in connection with next-generation electronic applications. In the present work, tin oxide(SnOx)thin films were deposited on unheated soda lime glass substrates by reactive DC sputtering from a pure Sn target. The structural, optical and electrical properties of the films were analysed as a function of the oxygen partial pressure in the sputtering atmosphere and of the post-deposition annealing temperature in air. A structural analysis was carried out using Raman spectroscopy and X-ray diffraction. Optical and electrical characterizations were performed using photo-spectrometry and Hall effect measurements,respectively. The films grown at room temperature and low oxygen pressures reached high deposition rates of above 45 nm/min, showing poorly crystalline SnO and low transparency. Subsequent heating to 350℃ allowed to achieve a more crystalline tetragonal SnO with an average visible transmittance of 65%,a p-type conductivity of 0.8 S/cm, and a hole mobility of 3.5 cm^2/(V s).

关键词： Transparent conducting oxide (TCO) Nanocrystalline structure Optical absorption Hole mobility

Time for a Nuclear Meeting： Protein Trafficking and Chromatin Dynamics Intersect in the Plant Circadian System

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Molecular Plant 2012年第3期5卷 554-565页

作者： Eva herrero Seth j. Davis Max Planck Institute for Plant Breeding Research Carl-von-Linne＇weg 10 50829 Cologne Germany Present address： MRC National Institute for Medical Research The Ridgeway Mill Hill NW7 1AA London UK

Circadian clocks mediate adaptation to the 24-h world. In Arabidopsis, most circadian-clock components act in the nucleus as transcriptional regulators and generate rhythmic oscillations of transcript accumulation. In this review, we focus on post-transcriptional events that modulate the activity of circadian-clock components, such as phosphorylation, ubiquitination and proteasome-mediated degradation, changes in cellular localization, and protein-protein interactions. These processes have been found to be essential for circadian function, not only in plants, but also in other circadian systems. Moreover, light and clock signaling networks are highly interconnected. In the nucleus, light and clock compo- nents work together to generate transcriptional rhythms, leading to a general control of the timing of plant physiological processes.

关键词： circadian light signaling chromatin cellular dynamics ubiquitin/proteasome-mediated proteolysis

Analytical model of IoT CoAP traffic

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Digital Communications and Networks 2019年第2期5卷 63-68页

作者： Rolando herrero College of Engineering Northeastern University02115BostonMAUSA

The Constrained Application Protocol (CoAP) is a mechanism that enables the efficient transmission of information in the context of Wireless Sensor Networks (WSNs) characteristic of the Internet of Things (IoT). CoAP is specifically intended to work well with low complexity sensors that have lim让ed access to computational resources. And because it lacks the overhead of other more sophisticated transport protocols,让 is suitable for high packet loss wireless networks. Relying on the User Datagram Protocol (UDP), CoAP introduces, among other things, confirmable and non-confirmable message types, depending on the nature of the source data. This paper presents a novel analytical model that can relate the application to network packet loss and be used to estimate the effect of lossy wireless channels in CoAP scenarios. Moreover, the model is ultimately validated by an experimental framework in which theoretical and experimental results are compared.

关键词： CoAP UDP WSN IoT Wireless

Injuries in Spanish female soccer players

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journal of Sport and Health Science 2018年第2期7卷 183-190页

作者： juan Del Coso Helena herrero juan j.Salinero Sport Sciences Institute Exercise Physiology LaboratoryCamilo Jose Cela University Medical Services Royal Spanish Football Federation Faculty of Medicine Complutense University of Madrid

Background: Epidemiologic research to learn the incidence, type, location, and severity of female soccer injuries and the risk factors for sustaining a sport injury is the first step in developing preventive policies. The aim of this study was to analyze the incidence of injuries in the population of female soccer players in ***: The injuries incurred by 25,397 female soccer players were registered by the medical staff of the Spanish Football Federation during 1 season. A standardized medical questionnaire was used to classify the injury according to type, severity, location, and injury mechanism. A total of 2108 injuries was reported with an incidence of 0.083 injuries per player per season. Most injuries were in the lower limbs(74.0%), mainly affecting knee(30.4%) and ankle joints(17.9%).Results: The proportion of injuries derived from contact with another player was higher during matches(33.7%) than during training(11.4%;p juries were classified as severe more frequently than were contact injuries(51.0% vs. 42.6%; p jury was found in adult soccer players(≥18 years) vs. their counterparts younger than 18 years(0.094 vs. 0.072 injuries per player per year, respectively; p jury variable(e.g., type, mechanism, location, or severity; p > 0.05).Conclusion: Most female soccer injuries were located at the knee and ankle; the injury mechanism determined the playing time lost; and the player's age did not affect injury characteristics.

关键词： Ankle Epidemiology Knee Sport injuries Women

First-principle calculations of magnetic properties of Ho_(6)(Fe,Mn)Bi_(2)compounds

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Rare Metals 2024年第11期43卷 6034-6047页

作者： Angel j.Garcia-Adeva Estibaliz Apinaniz Aritz herrero Ivan R.Aseguinolaza Alberto Oleaga Departamento de Fisica Aplicada Escuela de Ingenieria de V itoria-GasteizUniversidad del Pais V asco UPV/EHU01006 V itoria-GasteizSpain Departamento de Fisica Aplicada Escuela de Ingenieria de BilbaoUniversidad del Pais V asco UPV/EHU48013 BilbaoSpain

The magnetic properties of Ho_(6)MnBi_(2)and Ho_(6)FeBi_(2)crystals are investigated by means of density functional *** materials are currently an active subject of research in the context of magnetic refrigeration applications since they exhibit a remarkable magnetocaloric *** this work,the equation of state,density of states and magnetic moments are calculated and compared with previous experimental results for these ***,the Curie temperatures for the paramagnetic to ferromagnetic phase transition observed in these systems are calculated from first *** the calculated quantities are in reasonable agreement with experimental data,which suggests that density functional theory could provide a reliable framework to theoretically investigate the magnetic properties of intermetallic ternary compounds.

关键词： Intermetallic compounds Rare earths Magnetic properties Magnetocaloric effect Density functional theory Heisenberg model

The reversed intra- and extracellular pH in tumors as a unified strategy to chemotherapeutic delivery using targeted nanocarriers

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Acta Pharmaceutica Sinica B 2021年第8期11卷 2243-2264页

作者： Edgar Pérez-herrero Alberto Fernández-Medarde Departamento de Ingeniería Química y Tecnología Farmacéutica Universidad de La LagunaLa Laguna 38206TenerifeSpain Instituto Universitario de Bio-Orgánica Antonio González Universidad de La LagunaLa Laguna 38206TenerifeSpain Instituto Universitario de Tecnologías Biomédicas Universidad de La LagunaLa Laguna 38200TenerifeSpain Instituto de Biología Molecular y Celular Del Cáncer Centro de Investigación Del Cáncer(USAL-CSIC)Salamanca 37007Spain

Solid tumors are complex entities,comprising a wide variety of malignancies with very different molecular *** this,they share a set of characteristics known as"hallmarks of cancer"that can be used as common therapeutic ***,every tumor needs to change its metabolism in order to obtain the energy levels required for its high proliferative rates,and these adaptations lead to alterations in extra-and intracellular *** changes in p H are common to all solid tumors,and can be used either as therapeutic targets,blocking the cell proton transporters and reversing the pH changes,or as means to specifically deliver anticancer *** this review we will describe how proton transport inhibitors in association with nanocarriers have been designed to block the pH changes that are needed for cancer cells to survive after their metabolic *** will also describe studies aiming to decrease intracellular pH in cancer using nanoparticles as molecular cages for protons which will be released upon UV or IR light ***,we will comment on several studies that have used the extracellular pH in cancer for an enhanced cell internalization and tumor penetration of nanocarriers and a controlled drug delivery,describing how nanocarriers are being used to increase drug stability and specificity.

关键词： pH-Gradient inversion Metabolism of glucose Proton transport inhibitors Proton-caged carriers Chemotherapy Targeted drug delivery pH-Sensitive nanocarriers Warburg effect Cancer

The effect of rippling on the mechanical properties of graphene

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Nano Materials Science 2022年第1期4卷 18-26页

作者： Guillermo Lopez-Polin Cristina Gomez-Navarro julio Gomez-herrero Instituto de Ciencia de Materiales de Madrid CSICMadrid E 28049Spain Departamento de Física de La Materia Condensada Universidad Autónoma de MadridMadridE-28049Spain IFIMAC Condensed Matter Physics Center(IFIMAC).Universidad Autónoma de Madrid MadridE-28049Spain

Graphene is the stiffest material known so far but, due to its one-atom thickness, it is also very ***, free-standing graphene exhibit ripples that has major effects on its elastic properties. Here we will summarize three experiments where the influence of rippling is essential to address the results. Firstly, we observed that atomic vacancies lessen the negative thermal expansion coefficient(TEC) of free-standing *** also observed an increase of the Young's modulus with global applied strain and with the introduction of small density defects that we attributed to the decrease of rippling. Here, we will focus on a surprising feature observed in the data: the experiments consistently indicate that only the rippling with wavelengths between 5 and 10 nm influences the mechanics of graphene. The rippling responsible of the negative TEC and anomalous elasticity is thought to be dynamic, i.e. flexural phonons. However, flexural phonons with these wavelengths should have minor effects on the mechanics of graphene, therefore other mechanisms must be considered to address our observations. We propose static ripples as one of the key elements to correctly understand the thermomechanics of graphene and suggest that rippling arises naturally due to a competition of symmetry breaking and anharmonic fluctuations.

关键词： Graphene Mechanical properties Atomic force microscopy Defects Ripples Stmain

Thrombolysis in elderly patients

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journal of Geriatric Cardiology 2007年第4期4卷 250-253页

作者： Santiago herrero jose Antonio Lapuerta-Irigoyen Pacemaker and Coronary Unit Intensive Care ServiceCabuees HospitalGijon Spain Pacemaker and Coronary Unit Intensive Care ServiceCabuees HospitalGijonSpain

The elderly population consists of those over age 75 years and appears to represent the fastest-growing segment of the population. Intravenous thrombolytic therapy (TT) is the most common strategy for the treatment of acute myocardial infarction (AMI) in many parts of the world. However, TT carries a higher risk of intra-cranial hemorrhage (ICH) in the elderly patients. Primary percutaneous transluminal coronary angioplasty and stenting (PCI) represents an important alternative in these elderly individuals with contraindications to TT. In developing countries, or in areas without availability of primary PCI, TT remains the only therapeutic modality. Dedicated randomized trials are needed to provide a comprehensive understanding of AMI management in the elderly group.(j Geriatr Cardiol 2007;4:250-253.)

关键词： acute myocardial infarction thrombolysis elderly