Determining Interplanar Distances from STEM-EDX Hyperspectral Maps
نویسندگان
چکیده
Since the first demonstration of atomically resolved energy dispersive x-ray spectroscopy (EDX) using a scanning transmission electron microscope (STEM) in 2010 [1], theory based simulations established that EDS hyperspectral maps could be used to measure atomic distances. That is, EDX is an incoherent imaging mode and signal intensity corresponds directly to the structure of the sample [1]. It has also been demonstrated that fractional occupancies of chemical species can be quantified [2]. Here we present results exhibiting statistically significant atomic species-dependent differences in interplanar distances in addition to quantification of planar occupancies.
منابع مشابه
Improvement of the Classification of Hyperspectral images by Applying a Novel Method for Estimating Reference Reflectance Spectra
Hyperspectral image containing high spectral information has a large number of narrow spectral bands over a continuous spectral range. This allows the identification and recognition of materials and objects based on the comparison of the spectral reflectance of each of them in different wavelengths. Hence, hyperspectral image in the generation of land cover maps can be very efficient. In the hy...
متن کاملQuantitative Chemical Mapping of InGaN Quantum Wells from Calibrated High-Angle Annular Dark Field Micrographs.
We present a simple and robust method to acquire quantitative maps of compositional fluctuations in nanostructures from low magnification high-angle annular dark field (HAADF) micrographs calibrated by energy-dispersive X-ray (EDX) spectroscopy in scanning transmission electron microscopy (STEM) mode. We show that a nonuniform background in HAADF-STEM micrographs can be eliminated, to a first a...
متن کاملDetermination and Visualization of Peimine and Peiminine Content in Fritillaria thunbergii Bulbi Treated by Sulfur Fumigation Using Hyperspectral Imaging with Chemometrics.
Rapid, non-destructive, and accurate quantitative determination of the effective components in traditional Chinese medicine (TCM) is required by industries, planters, and regulators. In this study, near-infrared hyperspectral imaging was applied for determining the peimine and peiminine content in Fritillaria thunbergii bulbi under sulfur fumigation. Spectral data were extracted from the hypers...
متن کاملMultivariate Curve Resolution for Hyperspectral Image Analysis: Applications to Microarray Technology*
Multivariate curve resolution (MCR) using constrained alternating least squares algorithms represents a powerful analysis capability for the quantitative analysis of hyperspectral image data. We will demonstrate the application of MCR using data from a new hyperspectral fluorescence imaging microarray scanner for monitoring gene expression in cells from thousands of genes on the array. The new ...
متن کاملStudy of Microstructure and Elemental Micro-Composition of ZnO:Al Thin Films by Scanning and High Resolution Transmission Electron Microscopy and Energy Dispersive X-Ray Spectroscopy
The microstructure and micro-composition of ZnO thin films doped with Al, deposited on Si/SiO2 substrates by sol-gel method were investigated by scanning and high resolution transmission electron microscopy and related energy dispersive X-ray analyses (SEM-EDX, STEM-HRTEM/EDX). Thin films of ZnO were prepared by deposition of 1-10 successive layers with 0.5 at.% and 5 at.% Al concentrations. Th...
متن کامل