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Journal of Rare Earths 2024年第1期42卷 1-15,I0001页

作者： Julio Corredoira-Vázquez Cristina González-Barreira Paula Oreiro-Martínez Ana M.García-Deibe Jesús Sanmartín-Matalobos Matilde Fondo Departamento de Química Inorganica Facultade de QuímicaUniversidade de Santiago de CompostelaCampus Vida15782Santiago de CompostelaSpain Phantom-g CICECO-Aveiro Institute of MaterialsDepartment of PhysicsUniversity of Aveiro3810-193AveiroPortugal institute of materials(iMATUS) Universidade de Santiago de Compostela15782Santiago de CompostelaSpain

In this paper,the lanthanoid complexes of N_(5) and N_(6) macrocycle ligands,without pendant arms or additional heteroatoms,are *** review covers the period from 2015 to the current date,since in 2014 Schiff base macrocyclic ligands incorporating the pyridine moiety,and their complexes,were revised,and in 2015 the chemistry of pentaaza macrocycle ligands with rare earth metals was also *** and phthalocyanine ligands are not included in this review,which primarily focuses on complexes with Schiff bases and amines without pendant arms or any additional donor other than *** synthetic methods,structural characterization,based on single X-ray crystal data,and properties of the lanthanoid complexes,with special attention to magneto-structural correlations,are presented herein.

关键词： Lanthanoid N_(5),N_(6)macrocycle Coordination chemistry Chirality Biological activity Molecule magnet

极性杂化晶体中由可转换K-O配位键引发的异常铁弹转变（英文）

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Science China materials 2024年第10期67卷 3408-3414页

作者：李耀斌许伟剑陈晓娴刘德轩王志烁张伟雄 MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistryIGCMESun Yat-sen University Department of Chemistry&ciceco-aveiro institute of materials University of Aveiro

近年来,杂化铁弹体由于在机械开关和传感器等领域的应用潜力而引起广泛的研究兴趣.其中,铁弹性出现在高温相的异常铁弹相变尤其受到研究关注,但其实例较少,并且它们几乎都不涉及到化学键的断裂.本文基于含羟基的阳离子,构筑了一例其K-O... 详细信息

近年来,杂化铁弹体由于在机械开关和传感器等领域的应用潜力而引起广泛的研究兴趣.其中,铁弹性出现在高温相的异常铁弹相变尤其受到研究关注,但其实例较少,并且它们几乎都不涉及到化学键的断裂.本文基于含羟基的阳离子,构筑了一例其K-O配位键能发生可逆断裂与重组的极性杂化晶体（Me3NOH）2KBiCl6.该晶体经历了两步结构转变,伴随着Pna21-P1121-P63mc的空间群变化,即分别属于温度反转的mm2F2型铁弹相变和正常的6mmF2型铁弹相变.结构分析揭示该反常铁弹转变的来源为K-O配位键的断裂与重建.同时,有机阳离子的动力学变化和无机骨架的变形导致该晶体表现出不寻常的“高-低-中”倍频信号变化.本文展示了动态配位键在诱导异常铁弹相变中的巨大优势,为探索新型多功能铁弹材料提供了重要线索.

关键词： bond-switching transition ferroelastic phase transition hybrid crystal

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Liquid crystal immunosensors for the selective detection of Escherichia coli with a fast analysis tool

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Photonics Research 2024年第7期12卷 1564-1573页

作者： SANDRO C.OLIVEIRA MARIA S.SOARES BÁRBARA V.GONÇALVES ANDREIA C.M.RODRIGUES AMADEU M.V.M.SOARES RITA G.SOBRAL NUNO F.SANTOS JAN NEDOMA PEDRO L.ALMEIDA CARLOS MARQUES ciceco-aveiro institute of materials Physics DepartmentUniversity of Aveiro3810-193 AveiroPortugal i3N Physics DepartmentUniversity of Aveiro3810-193 AveiroPortugal Associate Laboratory i4HB-institute for Health and Bioeconomy School of Sciences and TechnologyNOVA University of Lisbon1099-085 LisbonPortugal CESAM-Centre for Environmental and Marine Studies and Department of Biology University of Aveiro3810-193 AveiroPortugal Department of Telecommunications VSB-Technical University of OstravaOstrava 70800Czech Republic i3N-CENIMAT School of Sciences and TechnologyNOVA University of Lisbon1099-085 LisbonPortugal UnIRE ISELPolytechnic Institute of Lisbon1549-020 LisbonPortugal Department of Physics VSB-Technical University of OstravaOstrava 70800Czech Republic

The consumption of contaminated food may cause serious illnesses,and traditional methods to detect Escherichia coli are still associated with long waiting times and high costs given the necessity to transport samples to specialized *** is a need to develop new technologies that allow cheap,fast,and direct monitoring at the site of ***,in this work,we developed optical immunosensors for the selective detection of ***,based on liquid crystal technology,whose molecules can align in different manners depending on the boundary conditions (such as substrates) as well as the environment that they *** glass substrate was functionalized with *** antibody using cysteamine as an intermediate,and a vertical alignment was imposed on the liquid crystal molecules by using DMOAP during *** presence of bacteria disrupts the alignment of the liquid crystal molecules,changing the intensity of light emerging between cross polarizers,measured using a polarized optical microscope and a *** was possible to detect *** in suspensions in the concentration range from 2.8 cells/mL to 2.8×10^(9) cells∕*** was also evaluated,and the sensors were used to analyze contaminated water samples.A prototype was developed to allow faster,in-situ,and easier analysis avoiding bulky instruments.

关键词： crystal alignment analysis

A new approach to pedestal differentiation for soil loss estimation-a case study from a burnt area in north-central Portugal

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Journal of Forestry Research 2024年第3期35卷 45-54页

作者： Frank G.A.Verheijen Martinho A.S.Martins Sergio A.Prats Jan J.Keizer Centre for Environmental and Marine Studies(CESAM) Department Environment and PlanningUniversity of Aveiro3810-193 AveiroPortugal Mediterranean institute for Agriculture Environment and Development(MED-CHANGE)Institute for Advanced Studies and ResearchUniversity of EvoraPolo da MitraAp.947006-554 EvoraPortugal GeoBiociencias Geotecnologias E Geoengenharias(GEOBIOTEC)Department Environment and PlanningUniversity of Aveiro3810-193 AveiroPortugal

Soil pedestals have long been used as qualitative indicators of soil splash *** rangelands,plant-capped pedestals,generally grass tussocks,have also been used to quantitatively estimate soil loss since the first half of the twentieth *** agricultural lands,forests,and bad-lands,stone-capped pedestals have been used as qualitative and semi-quantitative indicators of active,'extreme'*** work has been reported on using capstone pedestal data for quantifying soil *** postulate that three distinct capstone pedestal types may be present in any given location and that a detailed analysis of a pedestal height histogram may be used to recognize their *** analysis can subsequently inform if soil loss can be reliably estimated and if so,which of the existing methods using pedestal height data will provide more accurate *** three proposed capstone pedestal types are:(1)neo-pedestals formed underneath surface stones exposed by(partial)removal of the soil surface cover;(2)endo-pedestals formed underneath stones that were buried in the soil but have been exposed by erosion;and(3)phoenix-pedestals formed underneath stones from collapsed *** the pedestal height histogram of any given location,a skew to smaller heights may indicate the existence of endo-and/or phoenix-pedestals,which may be revealed as a bi-(or tri)modal distribution when using a smaller bin *** concept was applied to a case study where soil loss had been monitored for control plots and mulched plots during a 5-year period following wildfire in a eucalypt *** measured pedestal heights and used methods to quantitatively assess soil loss from soil pedestal data in the available *** pedestal data at the end of the 5-year period under or overestimated soil loss in the control treatment,with results ranging from 60 to 115%of measured soil loss,depending on the *** is postulated that phoenix-and endo-pedestals may be a driving fact

关键词： Soil pedestals Mulch Wildfire Soil erosion Char

Remaking a connection:molecular players involved in post-injury synapse formation

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Neural Regeneration Research 2025年第6期20卷 1719-1720页

作者： Diogo Tomé Ramiro D.Almeida iBiMED-institute of Biomedicine Department of Medical SciencesUniversity of AveiroAveiroPortugal CNC-Center for Neuroscience and Cell Biology University of CoimbraCoimbraPortugal

Functional recovery from central nervous system(CNS)trauma depends not only on axon regeneration or compensatory sprouting of uninjured fibers but also on the ability of newly grown axons to establish functional synapses with appropriate *** several studies have successfully promoted long-distance axonal regeneration in distinct CNS injury models,none of them have resulted in a viable therapeutic approach for patient recovery.A possible reason may be the lack of new synaptogenesis for reestablishing the circuitry lost after ***,we discuss how our understanding of the mechanisms that instruct synapse formation in the injured nervous system may contribute to the design of new strategies to promote functional restoration in traumatic CNS disorders.

关键词： viable injury instru

Theranostic of orthotopic gliomas by core-shell structured nanoplatforms

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Light(Science & Applications) 2022年第6期11卷 1034-1035页

作者： Luis D.Carlos Phantom-G CICECO-Aveiro Institute of MaterialsPhysics DepartmentUniversity of Aveiro3810-193 AveiroPortugal

Smart designed core-shell nanostructures formed by a YVO_(4)∶Nd^(3+) nanoparticle as the core,the sonosensitizer hematoporphyrinmonomethyl ether as the carrier,and MnO_(2) nanosheets as the shell demonstrate bimodal ... 详细信息

关键词： modal glioma orthotopic

Colloidal(Gd0.98Nd0.02)2O3 nanothermometers operating in a cell culture medium within the first and second biological windows

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Journal of Rare Earths 2020年第5期38卷 483-491页

作者： M.L.Debasu H.Oliveira J.Rocha L.D.Carlos Department of Physics CICECO-Aveiro Institute of MaterilsUniversidade de Aveiro3810-193AveiroPortugal Department of Chemistry CICECO-Aveiro Institute of MaterialsUniversidade de Aveiro3810-193AveiroPortugal Department of Biology CESAMLaboratory of Biotechnology and CytomicsUniversidade de Aveiro3810-193AveiroPortugal

Non-contact,self-referenced and near-infrared luminescent nanothermometers have been recognized as emerging tools in the fields of nanomedicine and nanotechnology due to their great capability of precise temperature readout at the nanoscale and real-time deep-tissue ***,the development of multifunctional and biocompatible luminescent nanothermometers operating within the optically transparent biological windows with high thermal sensitivity(>2.0%/K)remains ***,we present(Gd0.98Nd0.02)2O3 nanothermometers operated effectively within the first and second biological windows upon continuous-wave laser diode excitation at 808 *** thermometric parameters are defined by the relative changes in the emission intensities originating from the two Stark components of the 4 F3/2 level(R2 and R1)to the 4 I9/2(900-1000 nm),4 I11/2(1035-1155 nm)and 4 I13/2(1300-1450 nm)*** thermo metric parameters are evaluated for colloidal samples in a cell culture medium and powder samples,and the highest thermal sensitivity(2.18%/K at 298 K)is attained for the former in the first biological window(both the excitation and emission in the 800-965 nm range).The repeatability and temperature uncertainty are 99%and 1.2 K,*** nanothermometers are biocompatible with human MNT-1 melanoma and HaCaT cells for 24 h of exposure and nanoparticle concentration up to 0.400 mg/mL,showing their potential for applications in nanomedicine,e.g.,intracellular imaging and temperature mapping.

关键词： Gd2O3 Nd3^+-doped nanoparticles Luminescent nanothermometry Thermal sensitivity Cytotoxicity of nanoparticles Rare earths

Comment on“Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO_(3)ceramics with Sr deficiency”

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Journal of materials Science & Technology 2021年第6期65卷 151-153页

作者： Alexander Tkach Olena Okhay ciceco-aveiro institute of materials Department of Materials and Ceramic EngineeringUniversity ofAveiroAveiro3810-193Portugal Centre for Mechanical Technology and Automation(TEMA) Department of Mechanical EngineeringUniversity of AveiroAveiro3810-193Portugal

With this contribution,as a comment to the publication in Journal of Mate rials Science&Technology 44(2020)54,reporting giant dielectric response,structural characterization and numerical simulations in Sr_(1-1.5 x)Bi_xTiO_(3)ceramics,we show that the re ported results are rather contradicting and not well analysed,while the suggested mechanism for the giant permittivity response is not valid or doubtful and has to be ***,many details and data are missing making impossible not only to call the obtained results very suitable for practical application but even to reproduce them.

关键词： SrTiO_(3)ceramics Doped dielectrics Perovskite structure Giant permittivity

Preparation,luminescence and photofunctional performances of a hybrid layered gadolinium-europium hydroxide

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Journal of Rare Earths 2022年第9期40卷 1437-1444,I0004页

作者： Lu Liu Jingjie Yu Shikao Shi Jiye Wang Huihua Song Ruikang Zhang Lianshe Fu Hebei Key Laboratory of Inorganic Nanomaterials College of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Department of Physics CICECO–Aveiro Institute of MaterialsUniversity of Aveiro3810-193AveiroPortugal

The design and fabrication of rare earth ions incorporated into the inorganic/organic hybrid materials have attracted growing attention for seeking improved optical properties and photofunctional *** this paper,a novel hybrid composite based on the layered rare earth hydroxides was successfully prepared by the ion-exchange and intercalation chemical *** rare earth elements in the composite contain gadolinium(Gd)and europium(Eu)and the molar ratio of Gd to Eu is kept constant at 1.9:*** sodium dodecyl sulfonate and dye coumarin-3-carboxyllc acid are simultaneously incorporated into the layered rare earth hydroxides as supporting agent and light-harvesting antenna,*** resulting hybrid layered rare earth hydroxides exhibit the enlarged interlayer distance with about 2.60 nm,and the chemical composition was confirmed through X-ray diffraction,carbon,hydrogen and nitrogen(CHN)elemental analysis,infrared spectroscopy,and thermogravimetric *** layered solid compound shows the characteristic red emission corresponding to the^(5)D_(0)→^(7)F_(2)transition of Eu^(3+)ion,and the luminescence intensity of the optimized compound is greatly enhanced as compared to its corresponding nitrate and the hybrid composite without the introduction of dye *** hybrid layered rare earth hydroxides can be exfoliated into bright colloidal solution,which show superior recognition capability to Cu^(2+)ion with the distinct luminescence *** large quenching constant(1.4×10^(4)L/mol)and low detection limit(0.35μmol/L)are achieved for Cu^(2+)ion,implying a"turn-off"fluorescent sensor for Cu^(2+)***,a transparent film was prepared based on the colloidal solution and displays the typical red emission in folded *** new hybrid compound with enhanced luminescence and excellent photofunctional performances is expected to be applied in the fields of fluorescent sensing and flexible optical devices.

关键词： Layered rare earth hydroxides Luminescence Eu^(3+)ion Gd^(3+)ion Ion-exchange Intercalation chemistry

Sequential piezoresponse force microscopy and the‘small-data’problem

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npj Computational materials 2018年第1期4卷 419-425页

作者： Harsh Trivedi Vladimir V.Shvartsman Marco S.A.Medeiros Robert C.Pullar Doru C.Lupascu institute for materials Science and Center for Nanointegration Duis order ferroic switching induced by sburg-Essen(CENIDE) University of Duisburg-EssenEssenGermany ciceco–aveiro institute of materials University of AveiroAveiroPortugal Department of materials and Ceramic Engineering University of AveiroAveiroPortugal

The term big-data in the context of materials science not only stands for the volume,but also for the heterogeneous nature of the characterization *** is a common problem in combinatorial searches in materials science,as well as ***,these data-sets may well be‘small’in terms of limited step-size of the measurement *** to this limitation,application of higher-order statistics is not effective,and the choice of a suitable unsupervised learning method is restricted to those utilizing lower-order *** an interesting case study,we present here variable magnetic-field Piezoresponse Force Microscopy(PFM)study of composite multiferroics,where due to experimental limitations the magnetic field dependence of piezoresponse is registered with a coarse *** efficient extraction of this dependence,which corresponds to the local magnetoelectric effect,forms the central problem of this *** evaluate the performance of Principal Component Analysis(PCA)as a simple unsupervised learning technique,by pre-labeling possible patterns in the data using Density Based Clustering(DBSCAN).Based on this combinational analysis,we highlight how PCA using non-central second-moment can be useful in such cases for extracting information about the local material response and the corresponding spatial distribution.

关键词： DBSCAN problem utilizing