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Defocus image contrast in hexagonally-ordered mesoporous material

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dc.contributor.author Nakahara, Shohei
dc.contributor.author Tanner, David A.
dc.contributor.author Hudson, D.A
dc.contributor.author Magner, S
dc.contributor.author Redington, E
dc.contributor.author Hodnett, Benjamin K.
dc.date.accessioned 2013-12-04T12:45:15Z
dc.date.available 2013-12-04T12:45:15Z
dc.date.issued 2011
dc.identifier.citation Nakahara, S; Tanner, DA; Hudson, S; Magner, E; Redington, W; Hodnett, K (2011) 'Defocus image contrast in hexagonally-ordered mesoporous material'. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 13 (3):1189-1200. en_US
dc.identifier.uri http://hdl.handle.net/10344/3495
dc.description peer-reviewed en_US
dc.description.abstract A transmission electron microscope was used to characterize a powder form of hexagonally-ordered mesoporous silica material. The structural symmetry built into this amorphous material allowed one to obtain three characteristic images, i.e. a hexagonal honey-comb structure and wide/narrow parallel lines. These images were found to originate primarily from phase contrast, which changed sensitively with defocusing. To further understand the contrast behaviour of these images, an analytical form of the defocus contrast theory was developed and applied to the simulation of the characteristic wide/narrow parallel line images. The simulation was found to be in good qualitative agreement with experiments, where changes in focus conditions and specimen thickness were predicted to alter the contrast in the resulting parallel-line type images. en_US
dc.language.iso eng en_US
dc.publisher Royal Society of Chemistry en_US
dc.relation.ispartofseries Royal Chemistry Chemical Physics;Jan, 21, 13(3), pp. 1189-1200
dc.subject transmission electron-microscopy en_US
dc.subject molecular-sieves en_US
dc.subject silica en_US
dc.subject SBA-15 en_US
dc.subject films en_US
dc.subject tomography en_US
dc.subject adsorption en_US
dc.title Defocus image contrast in hexagonally-ordered mesoporous material en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2013-11-29T16:43:49Z
dc.description.version PUBLISHED
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1133191
dc.internal.copyrightchecked Yes
dc.description.status peer-reviewed


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