Hummingbird Scientific

How do Cu nanocatalysts degrade in the presence of CO2? Rui Serra-Maia, Eric Stach, and their colleagues at the University of Pennsylvania and Lawrence Livermore National Laboratory used their Hummingbird Scientific in-situ liquid electrochemical TEM sample holder (https://lnkd.in/guhTaK9) to investigate mechanisms of Cu nanocatalyst corrosion under various conditions, including CO2 evolution reaction (CO2ER) conditions, sub-onset for CO2ER (EWE?= 0?V vs. SHE’), and electroless conditions with CO2 exposure. Copper degradation was observed in the presence of CO2 below the threshold conditions required for CO2ER and without applied bias, while no Cu degradation was observed without CO2?even at EWE?capable of driving CO2ER. Oxidized surfaces are observed in particles corroded in CO2, but not in those exposed to CO2-free electrolytes. DFT calculations indicate that CO2?can behave as a dissolution agent for copper and copper-oxide surfaces, suggesting that formate-intermediate molecules are a key driver of corrosion. The study highlights the utility of the liquid-electrochemical cell in the study of nanocatalyst degradation and microenvironmental factors. See the comments below for a link to the full paper. ?? Follow?Hummingbird Scientific?to stay up to date on the latest in-situ TEM news. #TEM #electrochemistry #nanoparticles #hummingbirdscientific #catalysis #materialsscience #LPTEM #insitu #CO2ER #DFT

How can trapped charges influence local electrical behavior in stacked nanocapacitor layers? Leifang Zhang, Christophe Gatel, and their colleagues at CEMES-CNRS, Helmholtz-Zentrum Berlin, Freie Universit?t Berlin, and Université Paul Sabatier Toulouse III published on their use of the Hummingbird Scientific in-situ biasing TEM holder (https://lnkd.in/gkCJfTM) to quantify the charges trapped at dielectric/dielectric interfaces as well as metal/dielectric interfaces in nanocapacitors using operando electron holography. Focused-ion beam lamellae were characterized for charge trapping/detrapping. The electrostatic potentials were mapped at sub-nanometer spatial resolution with a bias applied. Negative and positive trapped charges at different interfaces were identified and then linked to their overall contribution to the electric field distribution. The Hummingbird Scientific biasing holder was used to apply the highly sensitive electron holography technique to reveal, for the first time, a linear relationship between the interfacial trapped charges and the applied bias, and the effect of the trapped charges on the local electrical behavior. See the comments below for a link to the full paper. ?? Follow?Hummingbird Scientific?to stay up to date on the latest in-situ TEM news. #insitu?#operando #TEM?#FIB #FTJ #interfaces #hummingbirdscientific #nanotechnology #materialsscience #FEM #electronholography

Hummingbird Scientific is in a great spot in the Pacific Northwest next to the Olympic Peninsula. Port Townsend, Washington, nestled at the northeastern tip of the Olympic Peninsula is a beautiful small town right on the water at Port Townsend Bay, set against the backdrop of uniquely preserved Victorian buildings, the Olympic Mountains and the Strait of Juan de Fuca. Check our career opportunities here: https://lnkd.in/gBbr6Vp2 Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #hiring #tem #sem #electronmicroscopy

Hummingbird Scientific is in a great spot in the Pacific Northwest next to the Olympic Peninsula. Port Townsend, Washington, nestled at the northeastern tip of the Olympic Peninsula is a beautiful small town right on the water at Port Townsend Bay, set against the backdrop of uniquely preserved Victorian buildings, the Olympic Mountains and the Strait of Juan de Fuca. Check our career opportunities here: https://lnkd.in/gBbr6Vp2 Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #hiring #tem #sem #electronmicroscopy

Hummingbird Scientific’s innovative suite of sample holders for in-situ TEM, SEM, and X-ray microscopy empowers researchers to observe real-time material behavior under various stimuli—including heating, cooling, and biasing—across diverse environments like vacuum, liquid, and gas. More information on our website: https://lnkd.in/gsSh_pH7 Visit our booth at KC75: International Conference on Innovative Materials Research (KC75:IC-IMR) at IIT Jammu to learn more about our latest in-situ microscopy products. Exhibit hours: Thursday, Feb 27th | 9:00 am - 5:00 pm Friday, Feb 28th | 9:00 am - 5:00 pm Saturday, Mar 1st | 9:00 am - 12:00 pm (All Local Times) Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #KC75 #electronmicroscopy #insitu #tem

How can trapped charges influence local electrical behavior in stacked nanocapacitor layers? Leifang Zhang, Christophe Gatel, and their colleagues at CEMES-CNRS, Helmholtz-Zentrum Berlin, Freie Universit?t Berlin, and Université Paul Sabatier Toulouse III published on their use of the Hummingbird Scientific in-situ biasing TEM holder (https://lnkd.in/gkCJfTM) to quantify the charges trapped at dielectric/dielectric interfaces as well as metal/dielectric interfaces in nanocapacitors using operando electron holography. Focused-ion beam lamellae were characterized for charge trapping/detrapping. The electrostatic potentials were mapped at sub-nanometer spatial resolution with a bias applied. Negative and positive trapped charges at different interfaces were identified and then linked to their overall contribution to the electric field distribution. The Hummingbird Scientific biasing holder was used to apply the highly sensitive electron holography technique to reveal, for the first time, a linear relationship between the interfacial trapped charges and the applied bias, and the effect of the trapped charges on the local electrical behavior. See the comments below for a link to the full paper. ?? Follow?Hummingbird Scientific?to stay up to date on the latest in-situ TEM news. #insitu?#operando #TEM?#FIB #FTJ #interfaces #hummingbirdscientific #nanotechnology #materialsscience #FEM #electronholography

Hummingbird Scientific is in Lacey, Washington. Our headquarters is surrounded by breathtaking landscapes, such as the iconic Cape Flattery which provides a dramatic backdrop to a surprisingly accessible hike. Visitors to Cape Flattery hike scenic trails, enjoy the ocean views, photograph dramatic sea stacks, watch wildlife and visit nearby beaches. Learn more about our open jobs in our careers page: https://lnkd.in/gBHHQa3K Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #hiring #electronmicroscopy #insitu #tem

Visit Hummingbird Scientific’s booth at KC75: International Conference on Innovative Materials Research (KC75:IC-IMR) at IIT Jammu to see our latest in-situ microscopy products. Exhibit hours: Thursday, Feb 27th | 9:00 am - 5:00 pm Friday, Feb 28th | 9:00 am - 5:00 pm Saturday, Mar 1st | 9:00 am - 12:00 pm (All Local Times) Looking forward to seeing you there! Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #KC75 #electronmicroscopy #insitu #tem

How does NaCl addition trigger liquid-liquid phase separation near polymer-capped nanoparticles? Alejandra Londo?o Calderón, Tanya Prozorov, and their colleagues at Ames National Laboratory, Iowa State University, and the University of Chicago used their Hummingbird Scientific in-situ liquid flow TEM sample holder (https://lnkd.in/guhTaK9) to investigate liquid-liquid phase separation and interfacial crystallization in pNIPAM polymer-capped Au nanoparticles after introduction of NaCl under in-situ TEM. Upon addition of NaCl, the density increase of the solution prompts a liquid-liquid phase separation that confines the polymer to the low-density and salt-deficient phase. The pNIPAM-capped Au nanoparticles follow this interface and reside on the surface of polymer-filled globes. These decorated globes are buoyant and escape to the air-water interface, collapse, and form hexagonal crystalline domains with NaCl concentration-dependent size. The study advances understanding of amphiphilic polymers and their role in bioinspired design and synthesis of functional nanostructures. See the comments below for a link to the full paper. ?? Follow?Hummingbird Scientific?to stay up to date on the latest in-situ TEM news. #TEM #selfassembly #nanoparticles #hummingbirdscientific #pNIPAM #materialsscience #LPTEM #insitu #nanostructures

How does NaCl addition trigger liquid-liquid phase separation near polymer-capped nanoparticles? Alejandra Londo?o Calderón, Tanya Prozorov, and their colleagues at Ames National Laboratory, Iowa State University, and the University of Chicago used their Hummingbird Scientific in-situ liquid flow TEM sample holder (https://lnkd.in/guhTaK9) to investigate liquid-liquid phase separation and interfacial crystallization in pNIPAM polymer-capped Au nanoparticles after introduction of NaCl under in-situ TEM. Upon addition of NaCl, the density increase of the solution prompts a liquid-liquid phase separation that confines the polymer to the low-density and salt-deficient phase. The pNIPAM-capped Au nanoparticles follow this interface and reside on the surface of polymer-filled globes. These decorated globes are buoyant and escape to the air-water interface, collapse, and form hexagonal crystalline domains with NaCl concentration-dependent size. The study advances understanding of amphiphilic polymers and their role in bioinspired design and synthesis of functional nanostructures. See the comments below for a link to the full paper. ?? Follow?Hummingbird Scientific?to stay up to date on the latest in-situ TEM news. #TEM #selfassembly #nanoparticles #hummingbirdscientific #pNIPAM #materialsscience #LPTEM #insitu #nanostructures