Campus Map - LNLS - CNPEM

74 In-situ study of formation and phase transition by X-ray absorption and diffraction in (Y.RT)cro3+γ compounds. 150 New method in the growth of thin films of Ag2Se and structural investigation through synchrotron radiation X-ray grazing incidence diffraction with in situ heating.

PRESENTATION

ORGANIZATION

PROGRAM

22nd November 2017

23rd November 2017

24th November 2017

With the rapid development of the availability of synchrotron radiation throughout Europe and in interaction with the very active user community in this field, new imaging techniques are rapidly gaining traction in virtually all areas of materials science and biomedicine. With the completion of the first phase of the upgrade of the European Synchrotron Radiation Facility (ESRF), several spectron nanoprobes and diffraction imaging beamlines have successfully returned to user operation.

IR and THz nanoimaging and nanospectroscopy – Emerging analytical tools for science and technology

XAFS Study of Inorganically Coated Colloidal Quantum Dots

Copper-Dopped Zinc Oxide Nanoparticles Synthesis by a Fast Polymer Precursor Based Method

Water Adsorption in Layered Material

Particle size effects on structural and optical properties of BaF 2 nanoparticles

Cluster models Cu 20 obtained by FSA and DFT strategies and XANES simulated spectrum by FDMNES

Phosphate fertilization effects on phosphorus speciation in an Oxisol under no till evaluated by P-XANES

Acknowledgments: The authors thank the Coordination for the Improvement of Personnel in Higher Education (CAPES) and the São Paulo Research Foundation for financial support (Process No. and the Brazilian Agricultural Research Corporation - National Soybean Study Center with Experimental Area Concession, LNI-CENA (Laboratory of Nuclear instrumentation - Center for Nuclear Energy in Agriculture) for assistance with this study and the University of São Paulo and Oklahoma State University for research assistance.

Chemical speciation of Sulphur in petroleum asphaltenes using XANES spectroscopies

An alternative paradigm for EUVL resists: hybrid n-CARs-design principles and photodynamics

PDF Phama research team: high-energy X-ray characterization of amorphous solid drugs using synchrotron radiation

Modelling the structure of Nafion membranes by using small angle x-ray scattering

Sodium Caseinate/Sunflower Oil Nanoemulsion-Based Gels Analyzed by SAXS

Insights into Aminotransferases From The Biosynthesis Pathway of Aminoglycosides Antibiotics

Analysis of sugarcane bagasse particles by X-ray microtomography

Polymeric precursor based fast-synthesis of lanthanum-dopped bismuth ferrite nanoparticles

Structural Characterization of Sodium Caseinate Aerogels

Microwave induced mineralogical transformation in copper ore

A versatile setup in reflection mode for in situ diffraction patterns acquisition from flat polycrystalline specimens bathed in a liquid

Magnetic and structural behavior of Ca 2 MnReO 6 under pressure

Production and initial crystallographic studies of 2,5-furandicarboxylic acid decarboxylase 1 enzyme from Paraburkholderia xenovorans

Internal structures of Thoropa miliaris tadpole using phase-contrast synchrotron microtomography

The authors would also like to thank the Electron Microscopy Laboratory from the Center for Technology of Hybrid Materials for the electron microscopy analysis (CTMH-USP).

Magnetic Field Induces Nanoparticles Structuring. A SAXS Application: Instrumental Development at LNLS and Data Analysis

Agradecimientos: Este trabajo fue apoyado por el Laboratorio Nacional de Luz Synchrotron (SAXS D02A y D01B Beamlines), Campinas-Brasil, Universidad Nacional de La Plata-Argentina y CONICET-Argentina.

STRUCTURING OF MAGNETIC NANOPARTICLES IN LIVING CELLS

In vivo XANES for determining the chemical environment of Zn in the stem of kidney beans treated with ZnO nanoparticles. So, it was used 3 different sizes of ZnO nanoparticles obtained as dispersions in water with surfactants. In this analysis, no spectral changes were detected for subsequent spectra recorded in the same sample, so there were no induced chemical changes on them.

The present analysis observed that for all the different sizes of ZnO NPs used, no evidence of uptake, transport or accumulation of all ZnO NPs was found. However, it is also reported that research found ZnO NPs in the shoot system4, and it may be a consequence of its reconstitution within the vacuole. It is not yet well understood how ZnO NPs are transformed and it is possible that each species has a different response to its absorption.

Structure and Properties of Siloxane-Polyether Hybrid Organic- Inorganic Materials for Drug Delivery of Salicylic Acid

Catalytic Nanoparticles sitting on top of Graphene: The heterojunction interaction with H 2 gas followed by in-situ GISAXS Experiments

MATERIAL

Complex structural arrangements of ceramide lipids is produced by asymmetric molecular shape

In the present study, we investigated the chemical environment of Cu in seeds of Phaseolus vulgaris L. common bean) treated with CuO nanoparticles (nCuO) in three different sizes: 25, 40 and <80 nm. Before the beam, a bench-top micro-X-ray fluorescence spectroscopy (µ-XRF) system was used to map the distribution of Cu along the seed after nanoparticle exposure. However, the Cu located in the seed embryo filled with 40 nm nCuO showed a redox behavior (Figure 1 (c)).

Common beans have a hilum associated with the seed coat, just below the hilum there is the micropyle, a small pore that allows water absorption into the seed. In addition to the above analysis, common bean seeds were also treated with Fe3O4 nanoparticles to verify the 3D distribution of Fe in the hilum region using X-ray tomography at the LNLS X-Ray Imaging beamline (IMX). -K edge XAS spectra recorded in different regions of P. vulgaris seeds treated with 1,000 mg Cu L-1 dispersions of CuO nanoparticles. a) Picture of a bean seed showing the three regions measured;.

Synthesis and structural characterization of new ion-conducting PVA/Clay/ionic liquid nanocomposite membranes

In-situ x-ray absorption and diffraction studies of formation and phase transition of (Y,RT)CrO3,4 compounds. The precursor material obtained in the synthesis was subjected to thermogravimetry (TG), differential scanning calorimetry (DSC), In-situ x-ray absorption and diffraction measurements for study of the formation process and transition phase. In-situ X-ray diffraction measurements in the precursor material showed the single-phase formation of the YCrO4, DyCrO4, GdCrO4 and NdCrO4 compounds (tetragonal structure and I41/amd space group) following a transition to YCrO3, DyCrO3, GdCrO3 and NdCrO3. orthorhombic structure and Pbnm space group), respectively.

In these results it was possible to observe a significant change in the XANES profile as well as edge displacements due to the change of oxidation state from Cr5+ to Cr3+. These results also showed that the compound formation temperature and phase transition change with ions; these results were also observed by TG and DSC analysis. Magnetization measurements as a function of magnetic field and temperature performed indicate ferromagnetic behavior for (Y,Dy,Gd)CrO4 samples with TC estimated at 8.5, 22, and 19 K, respectively.

Study of structural properties of Heavy Fermion compound YbFe 2 Zn 20 doped with Cd

Least-squares fits to the curves were made using linear combinations of the XANES spectra of the calcined materials and the standard sulfide patterns (Ni3S2, MoS2 or WS2), with the aim of estimating the degree of sulfidation of the active elements in all catalysts. The results showed that in the case of the Mo-containing sulfides, all materials have spectra corresponding to molybdenum disulfide at the Mo-K absorption edge. The first derived spectra reinforce the similarity between the spectra of the Mo-bearing sulfides and the spectra of molybdenum disulfide, indicating a high degree of sulfidation for all materials.

In contrast, the degree of sulfidation was not affected by prior calcination of LDH containing only tungsten. From the XANES results it was concluded that the catalysts with the greatest hydrogenation activity and selectivity were those with the highest degree of sulfidation of the active elements. Acknowledgments: The authors would like to thank the Laboratório Nacional de Luz Sincrotron (LNLS) for the XAS measurements by means of the project XAFS1-17762.

1]Benzothieno[3,2-b]benzothiophenes derivatives : influence in the molecular orientations and charge delocalization process

Structural characterization of Sb-based type II superlattices

Physicochemical properties of nanostructured Pd/lanthanide-doped ceria spheres with high catalytic activity for CH 4 combustion

Os autores agradecem a Fernando Muñoz, Anna Paula da Silva Sotero Levinsky, Cristiane Rodella, Fábio Zambello e Simone Baú Betim pela valiosa assistência experimental no LNLS.

Cobalt-dopped Zinc Oxide Nanoparticles Synthesis by a Fast Polymer Precursor Based Method

Advanced Modeling and Data Analysis of In-Situ SAXS investigations of silver nanoparticles nucleation

Unravelling the nature of NIR plasmonic nanoprisms

In vivo evaluation of zinc foliar absorption applied by sources with different solubility in soybean. It aims to reduce adsorption and leaching problems that occur when fertilizers are applied to the soil [1]. It is important to improve the absorption efficiency of fertilizers, avoid excessive accumulation in the environment and depletion of the global mineral sources.

The Zn chemical environment was characterized using XANES at the XRF beamline at the Brazilian Synchrotron National Laboratory. Sulphate uptake increased and reached a maximum after 32 h, when it starts to decrease, probably due to phytotoxicity caused by the high concentration of salt deposited on the leaf blade. At the maximum rate of absorption, zinc was completely bound to citrate and moved back to malate when absorption normalized.

Mapping Out the Dynamics of Cation Exchange by Means of Synchrotron XRD

Solid oxide fuel cells (SOFCs) are considered an excellent alternative among various clean energy sources, especially in the case of static and long-term applications due to their proven efficiency, stability and fuel flexibility [1]. Currently, interest in these devices is mainly focused on so-called intermediate temperature solid oxide fuel cells (IT-SOFCs) operating between 600-800 °C, which creates a need for new materials with higher electrochemical activity in this temperature range. However, new materials must be considered if rapid progress is to be made, as modifying traditional materials has proven to be a slow way forward.

With this in mind, we are looking for other perovskite phases that exhibit electrical conductivity and oxygen vacancies that can act as MIECs and also provide good catalytic activity for the ORR. In collaboration with other groups, we have already studied La4BaCu5O13-δ and doped versions with mixed results [3]. We found that the larger RE (rare earth) cation lowers the O/T phase transition temperature and precipitates in the RT-900 °C range for Nd, making it a more promising IT-SOFC cathode material in the characterization process.

Spectrochemical analysis of metals in gingival fluid of patients with dental implants and different prosthetic materials

Impact of the crystallization conditions on the polymorphism and crystalline size domain of Efavirenz

Application of these popular softwares in the characterization of nanopores embedded in ZnO films

Structure of Sodium Caseinate-Stabilized Nanoemulsions Studied by Laser Scanning Confocal Microscopy and Small Angle X-Ray

Scattering

In situ synchrotron radiation evaluation of hydrogen embrittlement in stainless steels and of severe plastic deformation at cryogenic

Isolation and characterization of nitrososulphide species (SNO – /SNOH) stabilized by coordination to iridium (III)

Mn-Zn ferrite nanoparticles probed by synchrotron pair distribution function analysis and anomalous X-ray scattering

Chemical speciation of size-segregated aerosol samples collected at an urban location in Central Argentina

Core-shell starch nanoparticles-co-p(NIPAM) hybrid microgels

The Surface Atomic Structure of Black Phosphorus Studied by Photoelectron Diffraction

Crystallographic and Kinetic Analysis of NahK Mutants: A Decarboxylase from the Naphthalene

Degradation Pathway

Genomic and functional analysis of the IncP-9 naphthalene catabolic plasmid NAH7 and its transposon Tn4655 suggests that a catabolic gene is spread by a tyrosine recombinase. An important factor in the development and optimization of these catalysts is the influence of the preparation and activation parameters on the structural properties [3-5]. Thus, this study focuses on the in situ XRD analysis of the reduction process of the Cu/ZnO and Cu/Zn/ZrO2 catalysts to evaluate the ZrO2 effect in the catalyst structure.

In situ X-ray diffraction (Figure 1) revealed that ZnO enabled the CuO reduction at lower temperatures (190 and 230 °C) compared to pure CuO. This shows that the catalysts can be recycled to be used again in the catalytic reaction. Acknowledgments: The authors would like to thank UFRN for the infrastructure, and LNLS/CNPEM for the XPD measurements performed within proposal number 20160653, entitled “In situ studies of activation Copper-based methanol synths catalysts”.

Synthesis and characterization of ligand-free Ni nanoclusters

Structure-property relations of polurea elastomers prepared by sol-gel process

Changes in the Structural Characteristics of Titania Photocatalysts Probed by Multivariate Analysis Applied to SAXS Profiles and FT-IR

Spectra

Calculation of Two-Dimensional Scattering Patterns for Oriented Systems

Grazing incidence X-ray off specular scattering on biomembrane Langmuir monolayers

Study of the profile of layer formed in plasma nitride austenitic stainless steel

Studying the 4f electrons in the Kondo lattice antiferromagnet Ce 2 RhIn 8

CoAl-terephthalate hydrotalcite materials with high aluminum contents

Our results show that it is possible to prepare CoAl terephthalate LDH with Al fractions in the layers up to 0.5, significantly higher than the generally accepted upper limit of 0.3.

Cooling induces phase separation in isolated Central Nervous System myelin membranes

The structure of Co species in novel active and selective Co/MCM41 catalyst in the COProx reaction prepared by supercritical CO 2 reactive

Mesoporous silica: in situ SAXS investigation of synthesis processes

Specific procedures for experiments of multiple diffraction at XRD2 beamline (LNLS) applicated to micro organic crystals

Stability and reactivity of copper clusters with five atoms

Effects of B4C Addition on Microstructure and Mechanical Properties of a Beta Titanium Alloy

Compact XRF spectrometer for CARNAUBA beamline at SIRIUS

Molecular Orientation and Ultrafast Charge Transfer Dynamics Studies on the P3HT:PCBM Blend

Lectins from Parkia biglobosa and Parkia platycephala: A comparative study of structure and biological effects

Mapping of elemental distribution of Cu, Fe and Zn in human prostatic carcinoma cell spheroid culture using synchrotron radiation

Advances in the Red/NIR-persistent luminescence materials design with VUV luminescence spectroscopy

Influence of oxidized lipid in the structural parameters of biological model membranes seen by Small Angle X-Ray Scattering (SAXS).

Impact of oxidized lipid in the structural parameters of biological model membranes as seen by Small Angle X-Ray Scattering (SAXS)

Study of hydration of sulphoaluminate cement by in situ synchrotron diffraction

Pressure-induced Phase Transition and Phonon Anomalies in Sr2IrO4

Copper Chemical Environment in Daphnia magna exposed to copper nanoparticles

This work investigated how nano-ZnO nanoparticles interact and are transformed into common beans (Phaseolus vulgaris). The effect of nano-ZnO on seed germination and root uptake was investigated. The higher concentration produced the worst results in the germination test for all sizes tested, compared to the negative control (water).

A gradient of Zn from the outer to the inner part can be seen when analyzing the seeds from these treatments in a bench-top micro X-ray fluorescence spectrometry (Micro-XRF). Using an XRF microbeam, XRF beamlines were conducted in LNLS, with a microbeam to detect the chemical environment of zinc at different points of the seed. These results indicate that zinc provided by ZnO nanoparticles is involved in seed germination and is modified in this process.

Structure of CoO thin films under mechanical stress

Study of the zeolitic precursor (P)MCM-22: nucleation and growth

Magnetite nanoparticles for hyperthermia cancer treatment

Qualıtatıve structure and straın determınatıon of ceo 2 nanopartıcles usıng atomıc paır dıstrıbutıon functıon analysıs

Micelles and hybrid silicas formation with tripropylammonium surfactants and different hydrophobic tails

Long-term drug release using SiO 2 -Poly(oxypropylene)hybrid matrix

Radiation damage caused by soft X-rays in sulfur tripeptides in solution: Why should we care?

Thermo-mechanical stability of austenite in post weld heat treated supermartensitic stainless steel weld metal

Magnetic Structures and Transitions of RNiSi3 (R = Gd-Ho)

In-situ electrochemical cell for lithium ion batteries and X-ray absorption studies

2 Laboratório de Filmes Finos e Superfícies, Department of Physics, Universidade Federal de Santa Catarina, Florianópolis, Brazil. However, the lack of consensus on the electrical properties of this oxide has brought serious obstacles to the application of Cu2O [1]. In general, the p-type conduction of Cu2O occurs due to the existence of native point defects, such as copper vacancies, that induce energy levels within the band gap and about 0.2 eV above the valence band maximum.

For electrodeposited Cu2O, these levels occur around 0.6 eV above the valence band, and the native point defect generating the conduction remains unknown. Here, using X-ray absorption spectroscopy (XAS) on electrodeposited samples of Cu2O with different thicknesses, we propose a method for evaluating point defect concentration based on the local coordination of the defects. A transition in the most concentrated point defect was found by changing the thickness of the films and attributed to the variation of the lattice parameter.

Properties of hybrid silicas synthesized using different cationic surfactants with cyclic head

Tambo Colorado pigments: a archaeometric study by synchrotron X-ray diffraction