Matilde Sosa’s Post

𝐒𝐜𝐢𝐞𝐧𝐭𝐢𝐬𝐭𝐬 𝐟𝐢𝐧𝐚𝐥𝐥𝐲 𝐠𝐞𝐭 𝐚 𝟑𝐃 𝐯𝐢𝐞𝐰 𝐨𝐟 𝐝𝐞𝐠𝐫𝐚𝐝𝐢𝐧𝐠 𝐦𝐢𝐜𝐫𝐨𝐩𝐥𝐚𝐬𝐭𝐢𝐜𝐬 A new study published this week in the journal 𝘕𝘢𝘯𝘰𝘵𝘦𝘤𝘩𝘯𝘰𝘭𝘰𝘨𝘺 employs a combination of traditional 2D microscopy and a 3D imaging tech normally used to view cells and macromolecules to observe the degradation of plastics in greater detail than previously possible. Until now, researchers observing micro and even smaller nanoplastics were limited to X-Rays and other two dimensional surfaces. By using a process called electron tomography, the researchers in the study were able to see multiple cross sectional views of the particles and their interiors. This revealed slight differences in the ways micro and nano plastic degrade. Continue Reading Here: https://lnkd.in/gNE5x4bY #Science #Microplastics #MIDSCI 𝘐𝘮𝘢𝘨𝘦: 𝘛𝘶𝘳𝘯𝘴 𝘰𝘶𝘵, 𝘮𝘪𝘤𝘳𝘰 𝘢𝘯𝘥 𝘯𝘢𝘯𝘰 𝘱𝘭𝘢𝘴𝘵𝘪𝘤𝘴 𝘥𝘦𝘨𝘳𝘢𝘥𝘦 𝘥𝘪𝘧𝘧𝘦𝘳𝘦𝘯𝘵𝘭𝘺. 𝘊𝘳𝘦𝘥𝘪𝘵: 𝘜𝘯𝘪𝘷𝘦𝘳𝘴𝘪𝘵𝘺 𝘰𝘧 𝘞𝘢𝘵𝘦𝘳𝘭𝘰𝘰

BSE-SEM (backscattered electron scanning electron microscopy) used for sub-surface plan-view imaging revealed significant insights into pore morphology characterisation. In this article, porous GaN distributed Bragg reflectors (DBRs) were fabricated using a methodology that involves epitaxy of undoped/doped multilayers and electrochemical etching. The study showcased similarities in pore structures between mesoporous and microporous GaN DBRs when comparing BSE-SEM with scanning transmission electron microscopy. It was observed that the primary electron landing energy (LE) of approximately 20 keV in a Zeiss GeminiSEM 300 yielded optimal image contrast and spatial resolution. Furthermore, the research delved into the detection of porosity approximately 295 nm sub-surface in an overgrown porous GaN DBR, highlighting the dominance of the first porous layer features in micrographs. Theoretical studies indicated that image contrast and spatial resolution could enhance with higher LE, plateauing around 30 keV, with a direct impact on information depth. These findings reinforce the significance of BSE-SEM in studying porous materials, emphasising the correlation between electron landing energy, image quality, and information depth. The experimental and theoretical alignment underscores the potential for improved imaging techniques and insights in this field. Congratulations to Maruf Sarkar, Francesca Adams, Sidra Dar, Jordan Penn, Yihong Ji, Abhiram Gundimeda, Tongtong Zhu, Chaowang Liu, Hassan Hirshy, Fabien Massabuau, Thomas O'Hanlon’Hanlon, Menno Kappers, Saptarsi Ghosh, Gunnar Kusch, Rachel Oliver University of Cambridge Paper link: https://lnkd.in/e79PzTDy #electronmicroscopy #subsampling #imaging #cryoelectronmicroscopy #cryobio #DrugDiscovery #cryoelectronmicroscopy #Crystallography #materialscience #fibsem #3delectronmicroscopy

💥 New Research Article Alert! 💥 We're thrilled to be a part of this groundbreaking research! 🎉 Our collaboration with the talented team at Tyndall National Institute has resulted in the publication of "Light-guided dynamic phantom to mimic microvasculature for biomedical applications: an exploration for pulse oximeter" in the Journal of Biomedical Optics. This innovative study presents a light-guided dynamic phantom that mimics microvascular properties, offering a valuable tool for calibrating and validating biomedical devices like pulse oximeters and spectroscopy systems. A huge congratulations to the authors Hui Ma, Dario Angelone, Claudia Guadagno, Stefan Andersson-Engels, and Sanathana Konugolu Venkata Sekar—we're proud to have collaborated on this exciting journey. 🙌 📖 Dive into the full article here: https://lnkd.in/dRW4znJn #Biophotonics #Standardization #DynamicPhantom #DiffuseReflectance #DiffuseOptics #PulseOximeter #Photoplethysmography #SPIE_JBO

Our newest research on Blue Phases has just been published in Scientific Reports! (Link to the article below) This work is part of our HoloBlue project. It really is quite exciting: we found out that by doping Blue Phase monocrystals with certain photoactive molecules, we can trigger macroscopic changes in the monocrystals, making an all-optical switchable 3D photonic crystal. We achieved two switching modes: one where the Blue Phase transitions between two BP phases, BPI and BPII, (two different cubic crystal systems), and a second mode, again reversible, switches between BPI and isotropic state. In all cases while maintaining the monocrystallinity of the whole system. None of these modes are related to the regular thermal transitions between LC phases; switching is triggered by light pulses of different wavelengths. This all-optical approach allows for a seamless fast remotely controlled optical switch between two 3D photonic crystals in different cubic crystal systems and between a photonic crystal and an isotropic matrix. Applications of switchable BPs for adaptive optics systems or photonic integrated circuits would make great advances using 3D photonic crystal switches. I want to thank my colleagues for their outstanding work: Alexej Bubnov, Martin Cigl, Wiktor Piecek, Sergei Mironov, Przemek Morawiak https://lnkd.in/dg5iDjQx

𝐒𝐜𝐢𝐞𝐧𝐭𝐢𝐬𝐭𝐬 𝐟𝐢𝐧𝐚𝐥𝐥𝐲 𝐠𝐞𝐭 𝐚 𝟑𝐃 𝐯𝐢𝐞𝐰 𝐨𝐟 𝐝𝐞𝐠𝐫𝐚𝐝𝐢𝐧𝐠 𝐦𝐢𝐜𝐫𝐨𝐩𝐥𝐚𝐬𝐭𝐢𝐜𝐬 A new study published this week in the journal 𝘕𝘢𝘯𝘰𝘵𝘦𝘤𝘩𝘯𝘰𝘭𝘰𝘨𝘺 employs a combination of traditional 2D microscopy and a 3D imaging tech normally used to view cells and macromolecules to observe the degradation of plastics in greater detail than previously possible. Until now, researchers observing micro and even smaller nanoplastics were limited to X-Rays and other two dimensional surfaces. By using a process called electron tomography, the researchers in the study were able to see multiple cross sectional views of the particles and their interiors. This revealed slight differences in the ways micro and nano plastic degrade. Continue Reading Here: https://lnkd.in/gQ8Guhqt #Science #Microplastics #MIDSCI 𝘐𝘮𝘢𝘨𝘦: 𝘛𝘶𝘳𝘯𝘴 𝘰𝘶𝘵, 𝘮𝘪𝘤𝘳𝘰 𝘢𝘯𝘥 𝘯𝘢𝘯𝘰 𝘱𝘭𝘢𝘴𝘵𝘪𝘤𝘴 𝘥𝘦𝘨𝘳𝘢𝘥𝘦 𝘥𝘪𝘧𝘧𝘦𝘳𝘦𝘯𝘵𝘭𝘺. 𝘊𝘳𝘦𝘥𝘪𝘵: 𝘜𝘯𝘪𝘷𝘦𝘳𝘴𝘪𝘵𝘺 𝘰𝘧 𝘞𝘢𝘵𝘦𝘳𝘭𝘰𝘰

Explore this validation study to see how Low-Voltage Electron Microscopy (LVEM) performs compared to traditional high-voltage TEM in nanoparticle characterization: https://lnkd.in/erDjDc4D With its tabletop design, affordability, and minimal maintenance requirements, the LVEM 5 offers a powerful and accessible solution for nanoscale imaging from your benchtop. #NanoparticleResearch #ElectronMicroscopy #LVEM #Nanotechnology #MaterialScience #Microscopy #CompactTEM #ResearchEquipment #Nanomaterials

A serendipitous discovery at our facility at Flinders University has led to the discovery of a cheap and easy rewritable data storage system that could revolutionise the field. The discovery was made by Dr Christopher Gibson, Director of our University of Adelaide facility, during what he thought would be a routine atomic force microscopy (AFM) analysis session at the Microscopy Australia facility at Flinders University. Dr Gibson explained: “When I exposed the polymer to the low-power laser built into the AFM, the result was a surprise. It was immediately modified, indicating an unusual response not seen when other common polymers are exposed to these lasers. We realised that this phenomenon might be useful in a number of applications, so we built a research project around this discovery.” He says the latest discovery would not have been possible without the tools afforded by Federal and State Government funding for the national facilities of Microscopy Australia and the The Australian National Fabrication Facility (ANFF) in SA, as well as Flinders Microscopy and Microanalysis. Australian Government Department of Education #NCRISimpact Read more on our website (https://lnkd.in/ewizY_GE)

🔬 𝐒𝐄𝐌 𝐯𝐬. 𝐓𝐄𝐌: 𝐖𝐡𝐚𝐭'𝐬 𝐭𝐡𝐞 𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐜𝐞? 🔬 Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) are two powerful imaging techniques, but do you know which one is right for your research? From how they work to what they reveal, understanding the differences can help you choose the best tool for your application. In our blog, we break it all down—resolution, imaging modes, applications, and more. Whether you're a seasoned microscopist or just getting started, this guide has everything you need to know! 👉 Read the blog here: https://ow.ly/MRtK50Uq9gC Have questions or insights? Let’s discuss in the comments! #ElectronMicroscopy #MaterialScience #SEM #TEM #MicroscopyInsights #NanoscienceBlog #PhenomSEM #DesktopSEM #TabletopSEM #BenchtopSEM

Exploring the Future of 3D Plasmonics with FusionScope® 3D plasmonic nanostructures are opening new frontiers in sensing, optoelectronics, and quantum technologies, but their precise fabrication and characterization remain challenging. A recent application note highlights how the FusionScope®, with its unique correlated microscopy capabilities, is revolutionizing workflows for nanoscale analysis. This research was conducted by the group of Harald Plank at FELMI-ZFE Institut für Elektronenmikroskopie und Nanoanalytik - Zentrum für Elektronenmikroskopie. Advantages of the analysis via #CorrelativeMicroscopy: - Accurate 3D Characterization: Seamless integration of SEM and AFM enables precise measurements on fragile sub-3 nm membranes. -Improved Predictability: Direct correlation between morphological data and simulations ensures reliable fabrication and optimization of 3D plasmonics. -Advanced Workflow: Correlative Microscopy bridges gaps between fabrication, purification, and functionality. 📖 Read the full application note to discover how this groundbreaking tool is transforming nanoscale research: https://lnkd.in/dyRtVG-r #Nanotechnology #Plasmonics #AFM #SEM #FusionScope

Excited to share our latest publication "Light-guided dynamic phantom to mimic microvasculature for biomedical applications: an exploration for pulse oximeter" in the Journal of Biomedical Optics! Our research introduces a light-guided dynamic phantom designed to mimic microvascular properties for biomedical applications. This novel approach enables precise simulation of biological signals, such as photoplethysmography (PPG), at various heart rates and oxygen saturation levels. It holds significant potential for calibrating and validating devices like pulse oximeters and spectroscopy systems. A special thanks to my co-authors Dario Angelone, Claudia Nunzia Guadagno, Stefan Andersson-Engels, and Sanathana Konugolu Venkata Sekar at Tyndall National Institute and BioPixS. for their incredible collaboration and support. Read the full article here: https://lnkd.in/dRW4znJn #Biophotonics #Standardization #DynamicPhantom #DiffuseReflectance #DiffuseOptics #PulseOximeter #Photoplethysmography #SPIE_JBO