Gescher's Lab of Technical Microbiology - TUHH’s Post

Very productive period for ANUBIS PROJECT with the publication of the new paper of VASUKI RAJAKUMARAN in Industrial Crops and Products journal. The main objective of this work is to gain a comprehensive understanding of the damage mechanism in flax fiber bundles presenting a novel aspect due to the intricate structure of bundle fibers, which is more complex compared to elementary fibers. The study specifically explores flax fiber bundles under tensile loading and investigates the impact of kink-bands on their failure through a combined approach, utilizing both experimental and numerical methods. In the experimental part, X-ray microtomography in situ tensile testing is carried out, which reveals complex failure mechanisms. Furthermore, a 3D-Finite Elements (FE) model is implemented utilizing 3D reconstructed fiber and used for numerical tensile analysis. Our work highlights that the kink-band region acts as prominent failure site in fiber bundles with significant stress concentration at the kink-band region, mainly induced by local porosity. https://lnkd.in/eA-dG5Wd ANUBIS PROJECT, INRAE BIA, Université Bretagne Sud, IRDL - UMR CNRS 6027/UBS/ENSTA-Bretagne/ENIB/UBO, Institut français d'archéologie orientale - Ifao, Synchrotron SOLEIL, MISL Mines Paris PSL

Light, Switch, Action! The Influence of Geometrical Photoisomerization in an Adaptive Self-Assembled System👌⚗️🧫🧪🌡️🧬 The ubiquitous ability of natural dynamic nanostructures to adapt to environmental changes is a highly desirable property for chemical systems, particularly in the development of complex matter, molecular machines, and life-like materials. Designing such systems is challenging due to the generation of complex mixtures with responses that are difficult to predict, characterize, and diversify. Here, we navigate between self-assembled architectures using light by operating an intrinsic photoswitchable building block that governs the state of the system. When complementary units are present, the photoswitch determines the predominant architecture, reversibly adapting between the cage and macrocycles, including (otherwise inaccessible) higher-energy assemblies. Our study showcases this concept with seven different transformations, offering an unprecedented degree of control, diversification, and adaptation by self-selecting complementary units. These findings could enable applications of on-demand dissipative macrocycles based on dynamic bonds. We also envision different transient nanostructures, e.g., reticular and polymeric materials, being explored by fine-tuning the nature of the complementary unit. 🛑 I strongly encourage you to view the clip provided below.😍😉👌⚗️🧪🌡️🧬 Reference: https://lnkd.in/dZKdckXb #organicchemistry #nanotechnology #nanomaterials #nanoparticles #fragrances #aromatic #synthesis #DielsAlderreaction #nanomedicine #polymers #nanochemistry #materials #Supramolecularchemistry #greenchemistry #nanoscience #phdposition #greenchemistry #inorganicchemistry #chemistry #newmolecules #nanocomposite #neurological #nanosensor #biochemistry #nanochip #macromolecules #nanomotors #catenane #rotaxane #knot #interlockedmolecules #metalfree #Machinemolecules #Photoisomerization

In our Featured Review Article this issue, Sheng-Yi Yang, Ben Zhong Tang and colleagues categorize aggregation-induced emission (AIE) spiro-materials into three classes based on their structures: namely, spiropyran, rhodamine, and spirofluorene derivatives. First, a detailed analysis of the design strategies for constructing AIE spiro-materials is provided, and the relationships between structures and properties are investigated. Second, the underlying mechanisms behind the AIE properties of spiro-materials are discussed and summarized. Last, the applications of AIE spiro-materials are discussed based on their molecular structure and optoelectronic properties, highlighting their immense potential in optoelectronic devices, biological applications, and sensing. This review aims to attract more researchers to engage in this field of study and promote further developments in spiro-chemistry and materials. #Matter https://lnkd.in/e-_S6QkJ

Tuesday publication update! 📖 In this newest publication in ACS Advanced Nano Materials, researchers from the #KULeuven have used the #AtmosphereAX system to look at passive adsorption materials for NOx removal. Authors Sreeprasanth Pulinthanathu Sree Claudio Bellani , Rainer Straubinger have investigated the dynamic behavior of palladium species impregnated onto zeolite under hydrothermal oxidation conditions, and using vapor! 🔬Using #Protochips' in situ gas phase TEM including the #AXON software, the formation and dispersion of Pd nanoparticles could be observed supported on a RHO zeolite. By heating the zeolite powder impregnated with a Pd complex up to 750°C within the TEM under an O2 atmosphere, water vapor, and argon, the dynamic evolution of Pd particles was shown. 🌡️ At lower temperatures, volatile masses began to form and gradually coalesced as the temperature increased. At the peak temperature of 750°C, a dispersal process occurred, releasing highly mobile smaller particles. This behavior underscores the intricate dynamics of Pd species under these conditions. ⚙️ The in situ TEM studies captured the dynamic changes of Pd nanoparticles, revealing mechanisms such as rapid thermally induced reduction and Ostwald ripening. These insights are crucial for optimizing and preparing supported noble-metal materials and catalysts. Studies like these enhance the understanding of nanoparticle formation on supports for catalysis and underscore the potential of in situ TEM as a powerful method for investigating and improving the synthesis of various catalytic nanomaterials. Read the entire paper here: https://hubs.li/Q02zPSwJ0 #Findyourbreakthrough #insituelectronmicroscopy #gascellmicroscopy #TEM #catalysis #heterogeneouscatalysis #nanoparticlesynthesis

We are excited to share our recent work on Graphdiyne (GDY) published by Qian (Enzo) CHEN in Carbon (IF=10.5). GDY is an emerging two-dimensional carbon allotrope with promising battery electrode applications. In this work, we compare the surface oxidation and thermal degradation mechanisms between GDY, graphene and graphyne. Please kindly check the link below for the pre-proof version of the paper: #graphdiyne #gdy #moleculardynamics #polyu #cityu #unsw

The reaction between ozone and alkenes has been studied extensively due to its importance in #Atmoschem Reactions of ozone with surface-bound alkenes is important for sensing and coatings such as application of the RADICAL #GasSensor 🔬 We continue to explore selected RADICAL project publications on Zenodo. Learn more: https://lnkd.in/eZnM9iQk In this paper for #EnvChem at the Royal Society of Chemistry, Amy Wolstenholme-Hogg and Naeem Iqbal investigated the ozonolysis of a series of surface attached alkenes with significant differences in size and structure to monitor the reaction kinetics, intermediate identification, and surface-bound products determination. Glass slides and spherical silica nanoparticles were used as model surface supports.  #Atmoschem #AirSensor #nanotechnology #AtmosphericRadicals #OHradical #EUfunded #H2020 RADICAL partners: Vaishali Vardhan Subhajit Biswas Stig Hellebust John Wenger University College Cork, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), University of York, Smartcom Bulgaria AD, National Technical University of Athens, UCC Academy

🔬 Exciting Research Alert! 🚀 📚 I’m thrilled to share our latest findings on magnet materials! My team has been investigating alternative solutions to the Nd2Fe14B magnet, given the scarcity of rare-earth (RE) resources. 🌍 🔍 Using density functional theory (DFT) calculations, we explored the effect of partial substitution of Nd with Zr within the ThMn12 structure. Specifically, we focused on the intriguing (Zr0.5Nd0.5)Fe11Ti compound. 🧪 🌟 Excitingly, our calculations point to promising magnetic properties in an Nd-lean quaternary compound—ZrNdFe22Ti2. With calculated values of |BH|max = 525 kJ/m3 and TC = 783 K, it’s remarkably close to the Nd2Fe14B magnet! 🌟 👉 Read the full paper for detailed insights: https://lnkd.in/dZ3XD2Rr #MaterialsScience #Research #MagnetMaterials #Engineering

I have thesis envy! Observing water formation, in-situ with angstrom (10^-10 meters) resolution using "an ultra-thin glassy membrane that holds gas molecules within honeycomb-shaped nanoreactors, so they can be viewed within high-vacuum transmission electron microscopes" is amazing! Combining this with electron energy loss spectroscopy (EELS) to measure the electronic structure of oxygen through the water phase transition, under different reactant concentrations, provides wonderful insights into the reaction kinetics on the palladium nanoparticle catalyst! Beautifully delicate work. https://lnkd.in/gQCMWw8S #water #materials #nanochemistry #materialsscience

Check out this most recent paper from my group. We show the use of microelectrodes for understanding nucleation and crystal growth kinetics and mechanisms with a model charge-transfer complex. We discovered a nonclassical crystal growth mechanism through oriented nanocluster attachment with support from density functional calculations. These charge-transfer crystals are useful for detecting toxic gases. The collaborative work is led by PhD student Ivan (Jiancheng) Lin. The co-authors are Dr Mohamed Kilani, Dr Mahroo Baharfar, Dr Jianbo Tang, Jiewei Zheng, Dr Priyank Kumar, Prof Kourosh Kalantar-Zadeh, and Prof Guangzhao Mao. #electrochemistry #crystallization #microelectronics #sensors UNSW Chemical Engineering & School of Chemical and Biomolecular Engineering USYD https://lnkd.in/gHRYKAcx

#MXenes MXenes, a rapidly growing family of two-dimensional (2D) transition metal carbides, nitrides, or carbonitrides (Mn+1XnTx, where M is a transition metal, X is carbon, nitrogen, or both, and T represents surface functional groups), have captured the scientific community's interest due to their exceptional physicochemical properties and diverse technological applications. This comprehensive review explores the latest breakthroughs in MXene synthesis and characterisation, emphasising their multifaceted applications in energy storage, catalysis, sensing, and other cutting-edge domains. This review examines the most widely used MXene synthesis strategies, including selective etching and delamination, and highlight recent advancements in controlling surface terminations, composition, and morphology. The influence of these synthetic parameters on MXene properties is discussed in detail. Characterisation techniques, ranging from spectroscopic methods to electron microscopy, are essential for elucidating MXenes' structure-property relationships. Research into energy storage leverages MXenes' high electrical conductivity, large surface area, and chemical tunability. This has led to significant progress in the field. This paper presents research efforts focused on optimising MXenes for both battery and supercapacitor applications. Additionally, the catalytic prowess of MXenes, particularly in electrocatalysis and photocatalysis, is explored, emphasising their role in green energy technologies and environmental remediation. MXenes' remarkable sensitivity and selectivity make them promising candidates for sensing various gases, biomolecules, and ions, offering exciting possibilities in healthcare and environmental monitoring. Importantly, this review underscores the need for continued optimisation of MXene synthesis protocols to achieve large-scale production, enhanced stability, and precise control over properties across various fields. #Research #polymers #nanocomposites #Chemistry #Physics #Nanomaterials #GreenTechnology #Nanotechnology #Composites #Phosphorene #Graphene #carbon #phosphorus #Graphene #borophene