$Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals$
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Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals

Abstract Ptychographic diffractive imaging has the potential for structural determination of materials without the constraints of relatively small, isolated samples required for conventional coherent diffractive imaging. The increased illumination diversity introduced using multiple measurements (ov...

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Autores principales:	Peng Wang, Fucai Zhang, Si Gao, Mian Zhang, Angus I. Kirkland
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6926c2f6aaed4c0e95125f8b313db53c
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spelling	oai:doaj.org-article:6926c2f6aaed4c0e95125f8b313db53c2021-12-02T11:40:23ZElectron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals10.1038/s41598-017-02778-x2045-2322https://doaj.org/article/6926c2f6aaed4c0e95125f8b313db53c2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02778-xhttps://doaj.org/toc/2045-2322Abstract Ptychographic diffractive imaging has the potential for structural determination of materials without the constraints of relatively small, isolated samples required for conventional coherent diffractive imaging. The increased illumination diversity introduced using multiple measurements (overlapped probe positions) also provides higher sensitivity to phase changes in weakly scattering samples. The resolution of a ptychographic reconstruction is ultimately determined by the diffraction limit for the wavelength of the radiation used. However, in practical experiments using electrons either the maximum collection angle of the detector used to record the data or the partial coherence of the source impose lower resolution limits. Nonetheless for medium energy electrons this suggests a potential sub 0.1 nm spatial resolution limit, comparable to that obtained using aberration corrected instruments. However, simultaneous visualization of light and heavier atoms in specimens using ptychography at sub 0.1 nm resolution presents a significant challenge. Here, we demonstrate a ptychographic reconstruction of a LaB6 crystal in which light B atoms were clearly resolved together with the heavy La atoms in the reconstructed phase. The technique used is general and can also be applied to non-crystalline and extended crystalline samples. As such it offers an alternative future basis for imaging the atomic structure of materials, particularly those containing low atomic number elements.Peng WangFucai ZhangSi GaoMian ZhangAngus I. KirklandNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Peng Wang Fucai Zhang Si Gao Mian Zhang Angus I. Kirkland Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals
description	Abstract Ptychographic diffractive imaging has the potential for structural determination of materials without the constraints of relatively small, isolated samples required for conventional coherent diffractive imaging. The increased illumination diversity introduced using multiple measurements (overlapped probe positions) also provides higher sensitivity to phase changes in weakly scattering samples. The resolution of a ptychographic reconstruction is ultimately determined by the diffraction limit for the wavelength of the radiation used. However, in practical experiments using electrons either the maximum collection angle of the detector used to record the data or the partial coherence of the source impose lower resolution limits. Nonetheless for medium energy electrons this suggests a potential sub 0.1 nm spatial resolution limit, comparable to that obtained using aberration corrected instruments. However, simultaneous visualization of light and heavier atoms in specimens using ptychography at sub 0.1 nm resolution presents a significant challenge. Here, we demonstrate a ptychographic reconstruction of a LaB6 crystal in which light B atoms were clearly resolved together with the heavy La atoms in the reconstructed phase. The technique used is general and can also be applied to non-crystalline and extended crystalline samples. As such it offers an alternative future basis for imaging the atomic structure of materials, particularly those containing low atomic number elements.
format	article
author	Peng Wang Fucai Zhang Si Gao Mian Zhang Angus I. Kirkland
author_facet	Peng Wang Fucai Zhang Si Gao Mian Zhang Angus I. Kirkland
author_sort	Peng Wang
title	Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals
title_short	Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals
title_full	Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals
title_fullStr	Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals
title_full_unstemmed	Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals
title_sort	electron ptychographic diffractive imaging of boron atoms in lab6 crystals
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/6926c2f6aaed4c0e95125f8b313db53c
work_keys_str_mv	AT pengwang electronptychographicdiffractiveimagingofboronatomsinlab6crystals AT fucaizhang electronptychographicdiffractiveimagingofboronatomsinlab6crystals AT sigao electronptychographicdiffractiveimagingofboronatomsinlab6crystals AT mianzhang electronptychographicdiffractiveimagingofboronatomsinlab6crystals AT angusikirkland electronptychographicdiffractiveimagingofboronatomsinlab6crystals
_version_	1718395647289196544

Electron Ptychographic Diffractive Imaging of Boron Atoms in LaB6 Crystals

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