By a News Reporter-Staff News Editor at Journal of Technology -- Investigators discuss new findings in Materials Science. According to news originating from College Station, Texas, by VerticalNews correspondents, research stated, "In this work, the accuracy of geometric phase analysis (GPA) on aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (Cs-corrected HAADF-STEM) images for lattice strain measurement at heterogeneous interfaces has been systematically investigated. Starting with an ideal crystal lattice of synthetic images, and then experimental HAADF images of a single-crystal lattice, we have quantitatively evaluated the inherent GPA processing artifacts and experimental errors due to STEM scanning distortions."
Our news journalists obtained a quote from the research from Texas A&M University, "Our results suggest that, with a properly chosen Fourier mask size and strain profile direction/width, 1 pm accuracy can be achieved for GPA strain quantification in the STEM fast-scan direction with a spatial resolution of
According to the news editors, the research concluded: "Although we focus on the interfacial lattice strain in this paper, the approaches for strain error estimation and the fundamental discussions on line profiles can also be applied, with some modifications, to other nanostructures."
For more information on this research see: Interface lattice displacement measurement to 1 pm by geometric phase analysis on aberration-corrected HAADF STEM images. Acta Materialia, 2013;61(15):5646-5663. Acta Materialia can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Acta Materialia - www.elsevier.com/wps/product/cws_home/221)
The news correspondents report that additional information may be obtained from Y.Y. Zhu, Texas A&M University, Dept. of Elect & Comp Engn, College Stn, TX 77843, United States. Additional authors for this research include C. Ophus, J. Ciston and H.Y. Wang.
Keywords for this news article include: Texas, United States, College Station, Materials Science, North and Central America
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC