NOMATEN’s Post

I am delighted to share our recent publication in the  Journal of Polymers and the Environment. Title: "Synthesis and Properties of a Bio‑based Plasticizer Derived from Fatty Acid Methyl Ester of Erucic Acid" 📝 In this study, a bio plasticizer was synthesized by epoxidizing erucic acid fatty acid methyl ester. The final product was compared with a conventional phthalate based plasticizer. Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (NMR) was used to confirm the structures of bio-based plasticizers. The bio plasticizer was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). To assess the efficacy of plasticization, mechanical characteristics of the films and migration tests were performed. Mechanical testing of bio plasticizers reveals that they function similarly to conventional plasticizers. The bio plasticizer plasticizing action was further validated by a shift in glass transition temperature (Tg) towards lower temperatures in the plasticized films. Thanks to my Co-authors Prof. Ravindra Kulkarni, Prof. Anand V. Patwardhan and Unnikrishnan Unnithan Read the full article here: https://lnkd.in/d3yuai_U #springernature #newpublication #bioplasticizer

A Comprehensive Analysis of the Nd-Ce-Cu-Oxide-Based Superconductor System with Advanced Frequency and Resonance Integration The field of superconductivity has undergone dramatic advancements since the discovery of BSCCO (Bismuth Strontium Calcium Copper Oxide) and other high-temperature superconductors (HTS), including the iron-basedfamily. However, the challenge of achieving room-temperature superconductivity remains one of the most pressing questions in materials science. While breakthroughs have been made in elevating the critical temperature (Tc), pushing these boundaries further requires an interdisciplinary approach that leverages a combination of cutting-edge materials, novel doping strategies, and dynamic field manipulations. This paper will discuss the current state of superconductors and propose a refined, more advanced system incorporating Nd-Ce-Cu-Oxide, BSCCO, Fe-based materials, ruthenium doping, topological insulators, twisted graphene, chemical pressure, ionic liquid doping, and a frequency resonance method. We will explore the projected effectiveness of this system and potential alternative strategies to achieve optimal superconductivity. 1. Current Superconductor Research: A Brief Overview The most commonly studied high-Tc superconductors today include BSCCO, YBCO (Yttrium Barium Copper Oxide), and iron-based superconductors. Each material has demonstrated significant promise, but they all face limitations: * BSCCO and similar cuprate superconductors are limited by a complex phase diagram, with superconductivity occurring only in a narrow range of doping levels and under specific thermal conditions. * Iron-based superconductors provide a different route to high-Tc, relying on magnetic interactions rather than the electron-phonon coupling typical of BCS (Bardeen-Cooper-Schrieffer) theory. However, they too are constrained by low coherence lengths and other challenges related to magnetic fluctuations. * Recently, there has been growing interest in twisted bilayer graphene (TBG), which exhibits superconductivity when stacked at a “magic angle,” but this system operates at very low temperatures and remains a highly experimental technology. Given these constraints, the materials we've discussed aim to integrate the benefits of each while addressing their specific limitations. 8/15

📢 Publication News! 📚🔬 We are pleased to present the latest paper titled "Exciton–Phonon Coupling in Single ZnCdSe-Dot/CdS-Rod Nanocrystals with Engineered Band Gaps from Type-II to Type-I" by Florian Johst, who has made significant strides in understanding the complexities of exciton–phonon coupling—a pivotal factor impacting the homogeneous emission line width in nanocrystals. In a comprehensive study, Florian employs single-particle spectroscopy on colloidal Zn1–xCdxSe/CdS and CdSe/CdS dot-in-rod nanocrystals at cryogenic temperatures (T ≈ 10 K). This innovative approach allows for the meticulous investigation of exciton–phonon interactions. One of the unique aspects of this research is the use of in situ cation exchange, enabling the evaluation of different band alignments and charge-carrier distributions. These variations are crucial for analyzing how the relative intensities of longitudinal optical S- and Se-type phonon replicas are influenced by the charge distribution within the nanocrystals. A noteworthy contribution of this work lies in the integration of experimental findings with quantum mechanical calculations within the effective mass approximation. These calculations reveal the significant of surface charges in affecting exciton–phonon coupling—a key insight for scientists aiming to manipulate these interactions for advanced photonic applications. For those interested in the theoretical and practical implications of this research, we invite you to explore the full article. https://lnkd.in/gV_sQiXF #Nanoscience #QuantumMechanics #MaterialsResearch #Nanocrystals #Photonics

SANS is a reliable means to analyse nano-carbides in AM steel. When it is combined with the APT, more information can be derived.

🌌 CENTRA Research News! 🌌 Paulo Gordo, a #research #engineer at Universidade de Coimbra, co-authored "Synthesis, characterization, and sensitivity tests of La0.8Ba0.1Bi0.1FeO3 nanoparticles towards a few parts-per-billion of acetone gas", a paper published in Heliyon - Cell Press! La0.8Ba0.1Bi0.1FeO3 powders were #synthesized via the auto-combustion method. Optical, positron annihilation #spectroscopy and gas sensing properties were simultaneously investigated. FTIR spectrum revealed Fe–O and Fe–O–Fe bond vibrations inside octahedron FeO6. Optical bandgap (Egap) was found at 2.23 eV. Positron annihilation studies confirmed open volume and vacancy-sized defects. La0.8Ba0.1Bi0.1FeO3 showed excellent response to acetone gas, with ultra-fast response and recovery times to parts-per-billion levels. Learn more: https://lnkd.in/dA6eEx7w

It's been almost two years since I embarked on my PhD journey. Beyond conference presentations, seminars and more; we've managed to publish two articles. Here is the first one, where we explore electrochemically synthesized graphene oxide as a support for metal phthalocyanines for the oxygen reduction reaction and its application in primary Zn-air batteries. These materials also enable their use as self-supporting electrodes in the form of buckypaper. https://lnkd.in/dxG5KvEQ

Interesting results from a recent research project investigating the structural and microstructural properties of hematite (α-Fe2O3) synthesized by an innovative coprecipitation method using oleic acid as the main surfactant. This study covered extensive characterization using advanced techniques such as FTIR, XRD, SEM, DLS and UV-VIS spectroscopy. In particular, the analysis revealed special features such as the presence of Fe-O bands in the FTIR spectrum, the confirmation of the pure α-Fe2O3 phase by X-ray diffraction, and the formation of spherical particles with an average size <200 nm. as proven. by SEM imaging and dynamic light scattering. In addition, UV-Vis spectroscopy revealed interesting absorption patterns in both the UV and visible regions. This study has important implications for the synthesis of nanomaterials and highlights the importance of careful characterization methods. For more information, access the paper via DOI: https://lnkd.in/ewXZiY3C #nanomaterials #synthesis #spectroscopy #exploration #characterization.

Exciting news to share! Our latest research paper, titled “Stable mass-selected AuTiOx nanoparticles for CO oxidation”, is now published in the Royal Society of Chemistry. 📚 In this study, we show a way to stabilize #nanoparticles through #alloying and self-anchoring on the support, all while preserving the catalytic activity. ⚛️ Our journey involved a meticulous blend of spectroscopy, microscopy, and activity tests in µ-reactors, unraveling the intricate stability and structural evolution of AuTiOx core/shell nanoparticles. 🧐 A sincere thank you to all collaborators for their invaluable contributions to this achievement. Special recognition goes to Rikke Egeberg Tankard, the co-first author, and Stefan Kei Akazawa, whose dedication and collaboration were indispensable in bringing this work to fruition. 🤝 Curious to know more? Check out the full paper here: https://lnkd.in/deXc_2aG 👇 #Research #Science #Catalysis

Seminário Geral do PPGQ   Título: “Shedding light on metal interactions with biomolecules”. Resumo: Synchrotron-based X-ray absorption spectroscopy (XAS) is a powerful technique for probing thelocal structure and electronic environment around a specific atom and can be applied on mattersin any physical state. Absorption of X-rays subsequently leads to fluorescence emission, which is the basis of another technique: X-ray fluorescence microscopy (XFM). These methods have diverse applications, from defining the coordination sphere around metal ions in metalloproteins, to obtaining elemental distribution maps inside cells. Two examples of such applications have been selected for this lecture, where XAS has been used to structurally characterize the reaction products of two antitumor active complexes, Rh2(CH3COO)4, and fac-[Re(bipyridine)(CO)3(H2O)](CF3SO)3, with sulfur-containing biomolecules, monitoring their cellular localization using XFM. Ministrante: Dr. Farideh Jalilehvand (University of Calgary, Canada) Data: 13/08/2024 Hora: 16h Local: Auditório 02 do edifício Prof. Dr. José Carlos Nogueira - Departamento de Química - UFSCar

Fast screening electrochemical properties: In our latest study, we applied different in-situ electrochemical methods (flow-cell design coupled to an ICP-MS and SVET) along the Al concentration gradients of combinatorically grown Mg-Al thin films in the passive state. This fast screening approach enables an efficient and ion selective corrosion current density determination as a function of varying solid solution compositions. Furthermore, we used post-corrosion surface analysis (STEM) to gain even a deeper mechanistic understanding of the passive layer structure on Mg-Al solid solutions. The study has been published as an open access publication in the journal of Electrochemistry Communications: https://lnkd.in/ec_-26tJ I would like to thank all authors (incl. Alexander Lutz, Shamsa Aliramaji, Siyuan (Spark) Zhang) for their outstanding work, done at Max-Planck-Institut für Nachhaltige Materialien GmbH, Gießerei-Institut der RWTH Aachen and the Chair of Materials Chemistry (MCh) - RWTH Aachen University. The research was funded by the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation in the CRC 1394 - Structural and Chemical Atomic Complexity - from defect phase diagrams to material properties. #Corrosion #Electrochemistry #thinfilms #research #Magnesium #Fastscreening #insitu