![]() Aguiar is a professional author of more than 50 peer-reviewed publications and technical contributions, and a professional committee member of the Materials Research Society. Now a senior scientist at Lockheed Martin's Advanced Technology Center with a diverse group of researchers and technical staff, he focuses on advances in ultra-high strength materials and novel concepts to enable future space missions. Prior roles include being an invited academic faculty member at the University of Utah and technical deputy director of the Nuclear Materials Discovery and Qualification Initiative at Idaho National Laboratory. He possesses expert knowledge of ultra-high temperature radiation hardened energy materials, characterization, and informatics-based approaches. Aguiar is a recognized expert in materials engineering, analytical instrumentation, and intelligence and materials research spanning global and nationwide collaborations, including in premier national research facilities at national laboratories, in universities, and in industry. His research spans the theoretical and experimental aspects of the atomic structures, physical properties, and manipulation of materials on the nanoscale based on electron–matter interaction phenomena such as electron diffraction, electron holography, electron dose-controlled, and in situ microscopy. He received his PhD in Materials Science from the University of Cadiz, Spain, and worked as a postdoctoral researcher at UNAM, Mexico, and CNRS, France. He leads the Structure Physics and Electron Microscopy group at UTSA. These include selected area electron diffraction, nanobeam diffraction, coherent electron diffraction, precession electron diffraction, scanning transmission electron microcopy diffraction, and high throughput data analytics, which leverage deep learning to reduce the propensity for data errors and translate nanometer and atomic scale measurements into material data.Īrturo Ponce is an Associate Professor and Associate Chair in the Department of Physics and Astronomy at the University of Texas at San Antonio. Here, we review advanced methodologies for characterizing metallic nanoparticles and clusters using a variety of electron diffraction procedures. These novel methodologies have improved with advances in electron microscopy instrumentation and electron detection. Novel methods based on electron diffraction have been used to efficiently study individual nanoparticles and clusters and these can overcome the obstacles commonly encountered during X-ray diffraction methods without the need for large crystals. However, this requires the clusters to crystallize in a similar way to those used in protein studies, which is not possible in many cases. One of the most common ways to determine the structures of nanoparticles and clusters is by means of X-ray diffraction methods. In recent years, there have been impressive advances in the controlled synthesis of clusters and their advanced characterization. ![]() Nanoparticles and metallic clusters continue to make a remarkable impact on novel and emerging technologies.
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