Hummingbird Scientific

How does chalcogenide microstructure correlate to electrical switching dynamics? Leifang Zhang, Christophe Gatel, and their colleagues at CEMES-CNRS, STMicroelectronics, and Université Paul Sabatier Toulouse III published on their use of the Hummingbird Scientific in-situ MEMS heating + biasing TEM holder (https://lnkd.in/gYuZD3d) to examine electrical biasing of Ge-rich Ge-Sb-Te (GST) thin films using in-situ transmission electron microscopy. Microstructural evolution of the phase change memory nanobridges is characterized. The nanobridges were affixed bridging the leads of FIB lamella-compatible biasing microchips. Pulses of various waveforms representing SET and RESET signals were injected through the nanobridges, and TEM imaging and diffraction of microstructural evolution is collected to correspond with measured iv plots. Reversible switching dynamics such as threshold switching and Joule-heating mediated switching mechanisms are confirmed, demonstrating this novel method for nanoscale characterization of phase-change materials. 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 #GGST #chalcogenides #hummingbirdscientific #nanotechnology #materialsscience #PCM #nanobridges

Happy Holidays from Hummingbird Scientific! We extend a heartfelt thank you to all our associates, customers and collaborators for your support. Wishing you a joyful holiday season filled with laughter and warmth. Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #MerryChristmas #ElectronMicroscopy #TEM #SEM

Winter is here! In Lacey, Washington, the season brings cool, misty mornings and crisp, refreshing air. While it doesn't snow often, people enjoy it when it does. The winter months usually bring gentle rain and overcast skies, creating a peaceful atmosphere. The evergreen forests stay lush and vibrant, the temperature rarely drops below 30 degrees, offering a perfect escape into nature even in the colder months. Explore the trails, enjoy cozy cafes, and soak in the beauty of the Olympia-Lacey-Tumwater area. Check out Hummingbird Scientific's website for exciting job opportunities and enjoy a great quality of life in the Pacific Northwest during winter. Find out more here: https://lnkd.in/gBHHQa3K Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #Hiring #ElectronMicroscopy #insitu #TEM Visit WA: https://lnkd.in/gxPQRvpp

How do defects affect electronic properties of quantum dot superlattices? Check out work from Xiaolei Chu, Adam Moule, and their colleagues at the University of California, Davis and UC Irvine, using the Hummingbird Scientific tomography sample holder (https://lnkd.in/e-DciNN) to perform HAADF-STEM electron tomography on a polycrystalline epitaxially-fused colloidal PbSe quantum dot superlattice. The high spatial resolution of the tomographic reconstruction enabled mapping of all 1846 quantum dots as well as the thousands of epitaxial connections (necks). The tomogram reveals a high correlation between neck number per quantum dot and local spatial order, suggesting that enhanced neck connectivity leads to reduced defects. Areas of lower neck connectivity and higher incidence of defects were related to position within the superlattice, and therefore tunable by synthesis parameters for future improvement of 3D quantum dot superlattice structural perfection. 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. #kMC #quantumdots #hummingbirdscientific #nanomaterials #materialsscience #STEM #HAADF #superlattice #tomography

How do defects affect electronic properties of quantum dot superlattices? Check out work from Xiaolei Chu, Adam Moule, and their colleagues at the University of California, Davis and UC Irvine, using the Hummingbird Scientific tomography sample holder (https://lnkd.in/e-DciNN) to perform HAADF-STEM electron tomography on a polycrystalline epitaxially-fused colloidal PbSe quantum dot superlattice. The high spatial resolution of the tomographic reconstruction enabled mapping of all 1846 quantum dots as well as the thousands of epitaxial connections (necks). The tomogram reveals a high correlation between neck number per quantum dot and local spatial order, suggesting that enhanced neck connectivity leads to reduced defects. Areas of lower neck connectivity and higher incidence of defects were related to position within the superlattice, and therefore tunable by synthesis parameters for future improvement of 3D quantum dot superlattice structural perfection. 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. #kMC #quantumdots #hummingbirdscientific #nanomaterials #materialsscience #STEM #HAADF #superlattice #tomography

Discover Your Career Path at Hummingbird Scientific in Washington State! Just like the majestic North Cascades that grace our state with over 300 glaciers and diverse ecosystems, Hummingbird Scientific offers a range of opportunities for creative minds. Check out our job openings at: https://lnkd.in/gBHHQa3K Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #NorthCascades #Hiring #ElectronMicroscopy #insitu #TEM Image credit: Visit WA https://lnkd.in/gxPQRvpp

A big thank you to everyone who visited our booth at the MRS Fall Meeting this week in Boston, MA! If you didn’t have a chance to stop by or have additional questions, we’d love to see you at booth 409 today between 10:00 AM and 1:00 PM. Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news.   #F24MRS #electronmicroscopy #insitu #tem #sem

How can liquid cell TEM reveal nanocrystal growth modes? Rui Zhang, Xing Lu, and their colleagues at Wuhan Institute of Technology and Huazhong University of Science and Technology published recent work using their Hummingbird Scientific in-situ liquid flow TEM sample holder (https://lnkd.in/guhTaK9) to investigate the growth of hexagonal zinc nanocrystals using aqueous precursors. Growth trajectories and coalescence were observed in-situ revealing classical growth modes: monomer addition and Ostwald ripening (OR) as well as two nonclassical coalescence mechanisms: coalescence induced by surface diffusion (CIBSD) and coalescence induced by grain boundary migration (CIBGBM). The study provides, for the first time, a fundamental understanding of the different stage of growth mechanisms for reactive metal nanocrystals and will inform future optimization of nanomaterial synthesis. 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 #hummingbirdscientific #nanoparticles #materialsscience #LC-TEM #insitu #crystallization

How can liquid cell TEM reveal nanocrystal growth modes? Rui Zhang, Xing Lu, and their colleagues at Wuhan Institute of Technology and Huazhong University of Science and Technology published recent work using their Hummingbird Scientific in-situ liquid flow TEM sample holder (https://lnkd.in/guhTaK9) to investigate the growth of hexagonal zinc nanocrystals using aqueous precursors. Growth trajectories and coalescence were observed in-situ revealing classical growth modes: monomer addition and Ostwald ripening (OR) as well as two nonclassical coalescence mechanisms: coalescence induced by surface diffusion (CIBSD) and coalescence induced by grain boundary migration (CIBGBM). The study provides, for the first time, a fundamental understanding of the different stage of growth mechanisms for reactive metal nanocrystals and will inform future optimization of nanomaterial synthesis. 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 #hummingbirdscientific #nanoparticles #materialsscience #LC-TEM #insitu #crystallization

Discover Your Career Path at Hummingbird Scientific in Washington State! Just like the majestic North Cascades that grace our state with over 300 glaciers and diverse ecosystems, Hummingbird Scientific offers a range of opportunities for creative minds. Check out our job openings at: https://lnkd.in/gBHHQa3K Follow Hummingbird Scientific to stay up to date on the latest in-situ TEM news. #NorthCascades #Hiring #ElectronMicroscopy #insitu #TEM Image credit: Visit WA https://lnkd.in/gxPQRvpp