Lotiskorea Newsletter Vol. 29
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📖 In the pursuit of sustainable energy solutions, electrocatalytic CO2 reduction at near-ambient temperatures is a huge challenge challenge. This newest publication in #NatureEnergy focusses on the synthesis of catalysts for reduction of CO2 to ethylene.
⚗️The #FusionAX system was used to observe the formation of SS-Cu catalysts under elevated temperatures. During the synthesis, it was possible to observe an abundant amount of stacking faults and grain boundaries using a facile solution method. These imperfections on the catalyst surface can amount to a large change in activity.
📽️ In the video it is possible to observe the stacking faults being formed from 250 °C up to 650 °C with different boundaries forming over time and temperature. These again give rise to surface Cu atoms with a low coordination number.
Want to read the full publication?
https://hubs.li/Q02myvqG0 |
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📖 This latest research uses the #FusionAX System to shed light on the intricate dynamics of energy transfer in nanostructures that arecapable of transducing waste heat.
🔍 Characterizing thermal energy transfer at nanoscale dimensions poses significant challenges, requiring both high spatial and spectral resolutions at infrared energies. Authors @Elliot Beutler, @Vishal Kumar and others in the group of @Jon Camden at #WashingtonUniversity have looked into using electron energy loss (EEL) and gain (EEG) spectroscopy, finding that these are ideal for exploring the modes of thermal energy transfer within composite nanostructures at their native length scales.
🔬 By employing these advanced techniques, they showed how individual nanostructures can concentrate energy through resonant thermal excitation of their photonic Fabry-Perot modes. The findings reveal that the spatially localized gain signal intensifies under in situ heating conditions.
📈 Theoretical modeling has provided invaluable insights, elucidating the mechanism behind these observations. The authors identified a Purcell enhancement in the local photonic density of states as the driving force behind the heightened rate of infrared energy transfer from the ambient environment to each nanostructure.
These findings mark a significant leap forward in our understanding of nanoscale energy dynamics and pave the way for the development of highly efficient energy conversion technologies.
Want to read the entire paper? Find it here:
https://hubs.ly/Q02mFX-l0 |
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Tuesday publication update! 📖 In this newest publication, the #FusionAX system was used to do electrical biasing experiments using in situ electron microscopy on next-generation resistive random-access memory (RRAM).
🔍 By employing advanced electron microscopy techniques, including transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and electron energy-loss spectroscopy (EELS), the microstructural evolution of Pt/NiO/Nb2O5 x/Pt bilayer devices could be followed.
⚡ The results clearly show that adding a polycrystalline NiO layer not only improved the electrical properties of Pt/Nb2O5 x/Pt monolayer devices but also led to a doubling of endurance and a reduction of the set voltage in Pt/NiO/Nb2O5 x/Pt bilayer devices.
🔬 Electron microscopy showed the intricate nature of the conductive filament (CF), showcasing the presence of oxygen vacancies and the formation of a funnel-shaped CF with the neck at the NiO/Nb2O5 x interface.
These insights provide a unique perspective and innovative strategy for enhancing RRAM devices and exploring new applications in electronics.
Want to read the entire paper?
https://hubs.ly/Q02mG3VC0 |
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📖 Have you ever wanted to see MXenes in the electron microscope in real time using electrochemstry? The authors from #NTU of this newest publication have looked at Ti3C2Tx MXene Film for High-Performance Actuators using the #PoseidonAX system!
📈The enhancement of tetrabutylammonium (TBA) in MXene catapults the in-plane actuation strain by a staggering 337%, amplifying mechanical robustness and stability in air and electrolyte environments.
💧TBA and Li ions co-inserting/deserting into/from MXene interlayer galleries and inter-edge gaps trigger substantial in-plane sliding of MXene sheets under polarizations. This resulted in an actuator with exceptional strength and modulus, generating substantial strain differences and remarkable blocking forces at just 1 V.
🦾Additionally, using a soft robotic tweezer the authors were able to seize objects effortlessly at 1 V and firmly holding them at 0 V. The ingenious sheet sliding mechanism, akin to the filament sliding theory in skeletal muscles, opens doors for future high-performance actuators with diverse nanomaterials.
Want to read the entire work?
Find it here!
https://hubs.li/Q02myHd30 |
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📖 This latest research using the #AtmosphereAX System visualizes the structural transformation of NiO/YSZ/BZY nanocomposite particles during the hydrogen reduction reaction with in situ gas electron microscopy!
🔥 This study shows the behavior of nanocomposite particles, used as cermet anodes, at the atomic level, at 1 atmosphere H2, and at high temperature. At high temperatures and under hydrogen, the nanocomposites underwent reduction to form Ni particles.
🔬 The authors used both spherical aberration (Cs) corrected transmission electron microscopy (TEM) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) to observe the transformations. When the authors heated the same particles in solely N2 gas, no changes were observed.
💡With the information from this study, more efficient cermet anodes can be developed and it contributes to the broader fiels of materials science.
Want to read the entire paper?
https://hubs.ly/Q02mG38T0 |
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📖 Have you ever tried putting methanol vapors in a transmission electron microscope, while still looking at nanoscale reactions? This latest research is looking into catalyst deactivation in the Methanol-to-Hydrocarbons (MTH) process using the #AtmosphereAX system!
💡Traditional zeolite (ZSM-5) catalysts often face rapid deactivation due to coke deposition, hindering efficiency and necessitating frequent regeneration. In this research low-melting-point metals like Gallium (Ga) were used as catalyst promoters.
☁️Using in situ microscopy with a Protochips Vapor Kit, methanol was introduced into the system while imaging at the nanoscale. The authors showed that the promoted Ga significantly enhanced the stability of methanol conversion by impeding coke deposition and aiding in the desorption of carbonaceous species from the zeolite.
📈By physically integrating liquid gallium with ZSM-5 zeolite, a ~14x increase in catalyst lifetime compared to the standard ZSM-5 was achieved! These findings pave the way for the development of deactivation-resistant zeolite catalysts, offering a promising avenue for sustainable and efficient MTH processes.
Want to read the entire study?
Find it here:
https://hubs.li/Q02qLKwz0 |
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문의
Email : hskim@lotiskorea.com
Tel : 010-2858-2798 |
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