Changes in local surface structure and Sr depletion in Fe-implanted SrTiO3 (001)
•Fe ion implantation of SrTiO3 and post-implantation results in formation of Sr1-yTi1-xFex+yO3-δ phase.•In Sr1-yTi1-xFex+yO3-δ phase, Fe assumes Fe3+ oxidation state in the bulk and Fe2+ oxidation state in the near surface area.•FEFF9 calculations indicate that Fe ions can substitute both Ti and Sr...
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| Veröffentlicht in: | Applied surface science 2017-01, Vol.393, p.74-81 |
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| creator | Lobacheva, O. Yiu, Y.M. Chen, N. Sham, T.K. Goncharova, L.V. |
| description | •Fe ion implantation of SrTiO3 and post-implantation results in formation of Sr1-yTi1-xFex+yO3-δ phase.•In Sr1-yTi1-xFex+yO3-δ phase, Fe assumes Fe3+ oxidation state in the bulk and Fe2+ oxidation state in the near surface area.•FEFF9 calculations indicate that Fe ions can substitute both Ti and Sr sites.•Formation of Sr1-yTi1-xFex+yO3-δ phase is accompanied by Sr depletion in the near surface region.
Local surface structure of single crystal strontium titanate SrTiO3 (001) samples implanted with Fe in the range of concentrations between 2×1014 to 2×1016Fe/cm2 at 30keV has been investigated. In order to facilitate Fe substitution (doping), implanted samples were annealed in oxygen at 350°C. Sr depletion was observed from the near-surface layers impacted by the ion-implantation process, as revealed by Rutherford Backscattering Spectrometry (RBS), X-ray photoelectron spectroscopy (XPS), X-ray Absorption Near Edge Spectroscopy (XANES), and Atomic Force Microscopy (AFM). Hydrocarbon contaminations on the surface may contribute to the mechanisms of Sr depletion, which have important implications for Sr(Ti1-xFex)O3-δ materials in gas sensing applications. |
| doi_str_mv | 10.1016/j.apsusc.2016.09.131 |
| format | Article |
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Local surface structure of single crystal strontium titanate SrTiO3 (001) samples implanted with Fe in the range of concentrations between 2×1014 to 2×1016Fe/cm2 at 30keV has been investigated. In order to facilitate Fe substitution (doping), implanted samples were annealed in oxygen at 350°C. Sr depletion was observed from the near-surface layers impacted by the ion-implantation process, as revealed by Rutherford Backscattering Spectrometry (RBS), X-ray photoelectron spectroscopy (XPS), X-ray Absorption Near Edge Spectroscopy (XANES), and Atomic Force Microscopy (AFM). Hydrocarbon contaminations on the surface may contribute to the mechanisms of Sr depletion, which have important implications for Sr(Ti1-xFex)O3-δ materials in gas sensing applications.</description><identifier>ISSN: 0169-4332</identifier><identifier>EISSN: 1873-5584</identifier><identifier>DOI: 10.1016/j.apsusc.2016.09.131</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Atomic force microscopy ; Depletion ; Fe-doped SrTiO3 ; Ion implantation ; Spectroscopy ; Strontium ; Strontium titanates ; Surface structure ; X-ray photoelectron spectroscopy ; X-rays ; XANES ; XPS</subject><ispartof>Applied surface science, 2017-01, Vol.393, p.74-81</ispartof><rights>2016 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c315t-1104b399053a2c52f6a7918f5106fe5711f43d0c0d79fae2c453deccaac0f7213</citedby><cites>FETCH-LOGICAL-c315t-1104b399053a2c52f6a7918f5106fe5711f43d0c0d79fae2c453deccaac0f7213</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0169433216320116$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27903,27904,65309</link.rule.ids></links><search><creatorcontrib>Lobacheva, O.</creatorcontrib><creatorcontrib>Yiu, Y.M.</creatorcontrib><creatorcontrib>Chen, N.</creatorcontrib><creatorcontrib>Sham, T.K.</creatorcontrib><creatorcontrib>Goncharova, L.V.</creatorcontrib><title>Changes in local surface structure and Sr depletion in Fe-implanted SrTiO3 (001)</title><title>Applied surface science</title><description>•Fe ion implantation of SrTiO3 and post-implantation results in formation of Sr1-yTi1-xFex+yO3-δ phase.•In Sr1-yTi1-xFex+yO3-δ phase, Fe assumes Fe3+ oxidation state in the bulk and Fe2+ oxidation state in the near surface area.•FEFF9 calculations indicate that Fe ions can substitute both Ti and Sr sites.•Formation of Sr1-yTi1-xFex+yO3-δ phase is accompanied by Sr depletion in the near surface region.
Local surface structure of single crystal strontium titanate SrTiO3 (001) samples implanted with Fe in the range of concentrations between 2×1014 to 2×1016Fe/cm2 at 30keV has been investigated. In order to facilitate Fe substitution (doping), implanted samples were annealed in oxygen at 350°C. Sr depletion was observed from the near-surface layers impacted by the ion-implantation process, as revealed by Rutherford Backscattering Spectrometry (RBS), X-ray photoelectron spectroscopy (XPS), X-ray Absorption Near Edge Spectroscopy (XANES), and Atomic Force Microscopy (AFM). Hydrocarbon contaminations on the surface may contribute to the mechanisms of Sr depletion, which have important implications for Sr(Ti1-xFex)O3-δ materials in gas sensing applications.</description><subject>Atomic force microscopy</subject><subject>Depletion</subject><subject>Fe-doped SrTiO3</subject><subject>Ion implantation</subject><subject>Spectroscopy</subject><subject>Strontium</subject><subject>Strontium titanates</subject><subject>Surface structure</subject><subject>X-ray photoelectron spectroscopy</subject><subject>X-rays</subject><subject>XANES</subject><subject>XPS</subject><issn>0169-4332</issn><issn>1873-5584</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouK7-Aw85rofWTNO0zUWQxVVhYQXXc4jpRLN025q0gv_elHr2NAzvBzMPIdfAUmBQ3B5S3YcxmDSLW8pkChxOyAKqkidCVPkpWURBJjnn2Tm5COHAGGRRXZCX9aduPzBQ19KmM7qhYfRWG6Rh8KMZRo9UtzV99bTGvsHBde3k3WDijn2j2wEnce92nK5i680lObO6CXj1N5fkbfOwXz8l293j8_p-mxgOYkgAWP7OpWSC68yIzBa6lFBZAaywKEoAm_OaGVaX0mrMTC54jcZobZgtM-BLspp7e999jRgGdXTBYBNPwm4MCqoiF5mUBY_WfLYa34Xg0areu6P2PwqYmgCqg5oBqgmgYlJFgDF2N8cwvvHt0KtgHLYGa-fRDKru3P8Fv3T0eck</recordid><startdate>20170130</startdate><enddate>20170130</enddate><creator>Lobacheva, O.</creator><creator>Yiu, Y.M.</creator><creator>Chen, N.</creator><creator>Sham, T.K.</creator><creator>Goncharova, L.V.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20170130</creationdate><title>Changes in local surface structure and Sr depletion in Fe-implanted SrTiO3 (001)</title><author>Lobacheva, O. ; Yiu, Y.M. ; Chen, N. ; Sham, T.K. ; Goncharova, L.V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c315t-1104b399053a2c52f6a7918f5106fe5711f43d0c0d79fae2c453deccaac0f7213</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Atomic force microscopy</topic><topic>Depletion</topic><topic>Fe-doped SrTiO3</topic><topic>Ion implantation</topic><topic>Spectroscopy</topic><topic>Strontium</topic><topic>Strontium titanates</topic><topic>Surface structure</topic><topic>X-ray photoelectron spectroscopy</topic><topic>X-rays</topic><topic>XANES</topic><topic>XPS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lobacheva, O.</creatorcontrib><creatorcontrib>Yiu, Y.M.</creatorcontrib><creatorcontrib>Chen, N.</creatorcontrib><creatorcontrib>Sham, T.K.</creatorcontrib><creatorcontrib>Goncharova, L.V.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied surface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lobacheva, O.</au><au>Yiu, Y.M.</au><au>Chen, N.</au><au>Sham, T.K.</au><au>Goncharova, L.V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Changes in local surface structure and Sr depletion in Fe-implanted SrTiO3 (001)</atitle><jtitle>Applied surface science</jtitle><date>2017-01-30</date><risdate>2017</risdate><volume>393</volume><spage>74</spage><epage>81</epage><pages>74-81</pages><issn>0169-4332</issn><eissn>1873-5584</eissn><abstract>•Fe ion implantation of SrTiO3 and post-implantation results in formation of Sr1-yTi1-xFex+yO3-δ phase.•In Sr1-yTi1-xFex+yO3-δ phase, Fe assumes Fe3+ oxidation state in the bulk and Fe2+ oxidation state in the near surface area.•FEFF9 calculations indicate that Fe ions can substitute both Ti and Sr sites.•Formation of Sr1-yTi1-xFex+yO3-δ phase is accompanied by Sr depletion in the near surface region.
Local surface structure of single crystal strontium titanate SrTiO3 (001) samples implanted with Fe in the range of concentrations between 2×1014 to 2×1016Fe/cm2 at 30keV has been investigated. In order to facilitate Fe substitution (doping), implanted samples were annealed in oxygen at 350°C. Sr depletion was observed from the near-surface layers impacted by the ion-implantation process, as revealed by Rutherford Backscattering Spectrometry (RBS), X-ray photoelectron spectroscopy (XPS), X-ray Absorption Near Edge Spectroscopy (XANES), and Atomic Force Microscopy (AFM). Hydrocarbon contaminations on the surface may contribute to the mechanisms of Sr depletion, which have important implications for Sr(Ti1-xFex)O3-δ materials in gas sensing applications.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.apsusc.2016.09.131</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Atomic force microscopy Depletion Fe-doped SrTiO3 Ion implantation Spectroscopy Strontium Strontium titanates Surface structure X-ray photoelectron spectroscopy X-rays XANES XPS |
| title | Changes in local surface structure and Sr depletion in Fe-implanted SrTiO3 (001) |
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