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Kinetics of island diffusion on Cu(111) and Ag(111) studied with variable-temperature STM
The diffusion of vacancy islands on Cu(111) and Ag(111) and of adatom islands on Ag(111) has been studied using fast scanning STM. Diffusion of atoms along island edges (periphery diffusion) is much more effective in contributing to the diffusion of the islands than diffusion of atoms via terrace si...
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| Published in: | Surface science 2000-10, Vol.465 (1), p.19-39 |
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| Main Authors: | , , , , , |
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| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c414t-69f70fed2b11949aa3383b4287bb7149c177ed594f71071dafb2e0f3ef98a81b3 |
| container_end_page | 39 |
| container_issue | 1 |
| container_start_page | 19 |
| container_title | Surface science |
| container_volume | 465 |
| creator | Schlößer, Dietmar C. Morgenstern, Karina Verheij, Laurens K. Rosenfeld, Georg Besenbacher, Flemming Comsa, George |
| description | The diffusion of vacancy islands on Cu(111) and Ag(111) and of adatom islands on Ag(111) has been studied using fast scanning STM. Diffusion of atoms along island edges (periphery diffusion) is much more effective in contributing to the diffusion of the islands than diffusion of atoms via terrace sites, under the conditions considered in this work. Assuming power-law scaling of the diffusion coefficient with the size of the islands, effective exponents,
β, between 1.33 and 1.63 were determined. The effective diffusion barrier
E
d
was found to be 0.49
eV on Cu and between 0.51 and 0.53
eV on Ag, respectively. Activation energies for the diffusion of atoms along the island edges and for the breaking up of closed island edges (core breakup) were calculated using potentials derived from effective medium theory. Qualitative and quantitative comparisons between the measured and calculated activation energies for diffusion show that one cannot explain the island diffusion as being governed by one single rate-limiting process. The results are consistent with a mechanism for which both periphery diffusion and core breakup are rate-limiting for island diffusion. |
| doi_str_mv | 10.1016/S0039-6028(00)00682-8 |
| format | article |
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β, between 1.33 and 1.63 were determined. The effective diffusion barrier
E
d
was found to be 0.49
eV on Cu and between 0.51 and 0.53
eV on Ag, respectively. Activation energies for the diffusion of atoms along the island edges and for the breaking up of closed island edges (core breakup) were calculated using potentials derived from effective medium theory. Qualitative and quantitative comparisons between the measured and calculated activation energies for diffusion show that one cannot explain the island diffusion as being governed by one single rate-limiting process. The results are consistent with a mechanism for which both periphery diffusion and core breakup are rate-limiting for island diffusion.</description><identifier>ISSN: 0039-6028</identifier><identifier>EISSN: 1879-2758</identifier><identifier>DOI: 10.1016/S0039-6028(00)00682-8</identifier><identifier>CODEN: SUSCAS</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Applied sciences ; Condensed matter: structure, mechanical and thermal properties ; Copper ; Diffusion and migration ; Diffusion; interface formation ; Exact sciences and technology ; Metals. Metallurgy ; Physics ; Scanning tunneling microscopy ; Solid surfaces and solid-solid interfaces ; Surface diffusion ; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</subject><ispartof>Surface science, 2000-10, Vol.465 (1), p.19-39</ispartof><rights>2000 Elsevier Science B.V.</rights><rights>2000 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c414t-69f70fed2b11949aa3383b4287bb7149c177ed594f71071dafb2e0f3ef98a81b3</citedby><cites>FETCH-LOGICAL-c414t-69f70fed2b11949aa3383b4287bb7149c177ed594f71071dafb2e0f3ef98a81b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,783,787,27936,27937</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1520769$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Schlößer, Dietmar C.</creatorcontrib><creatorcontrib>Morgenstern, Karina</creatorcontrib><creatorcontrib>Verheij, Laurens K.</creatorcontrib><creatorcontrib>Rosenfeld, Georg</creatorcontrib><creatorcontrib>Besenbacher, Flemming</creatorcontrib><creatorcontrib>Comsa, George</creatorcontrib><title>Kinetics of island diffusion on Cu(111) and Ag(111) studied with variable-temperature STM</title><title>Surface science</title><description>The diffusion of vacancy islands on Cu(111) and Ag(111) and of adatom islands on Ag(111) has been studied using fast scanning STM. Diffusion of atoms along island edges (periphery diffusion) is much more effective in contributing to the diffusion of the islands than diffusion of atoms via terrace sites, under the conditions considered in this work. Assuming power-law scaling of the diffusion coefficient with the size of the islands, effective exponents,
β, between 1.33 and 1.63 were determined. The effective diffusion barrier
E
d
was found to be 0.49
eV on Cu and between 0.51 and 0.53
eV on Ag, respectively. Activation energies for the diffusion of atoms along the island edges and for the breaking up of closed island edges (core breakup) were calculated using potentials derived from effective medium theory. Qualitative and quantitative comparisons between the measured and calculated activation energies for diffusion show that one cannot explain the island diffusion as being governed by one single rate-limiting process. The results are consistent with a mechanism for which both periphery diffusion and core breakup are rate-limiting for island diffusion.</description><subject>Applied sciences</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Copper</subject><subject>Diffusion and migration</subject><subject>Diffusion; interface formation</subject><subject>Exact sciences and technology</subject><subject>Metals. Metallurgy</subject><subject>Physics</subject><subject>Scanning tunneling microscopy</subject><subject>Solid surfaces and solid-solid interfaces</subject><subject>Surface diffusion</subject><subject>Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</subject><issn>0039-6028</issn><issn>1879-2758</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouH78BKEHEfdQnelXkpPI4hcqHtSDp5AmE4102zVpFf-9XVf0aAhkIM_MyzyM7SEcIWB1fA-Qy7SCTBwCTAEqkaVijU1QcJlmvBTrbPKLbLKtGF9hPIUsJ-zp2rfUexOTziU-Nrq1ifXODdF3bTLe2XCIiNNk-XH6vKpjP1hPNvnw_UvyroPXdUNpT_MFBd0PgZL7h9sdtuF0E2n3591mj-dnD7PL9Obu4mp2epOaAos-raTj4MhmNaIspNZ5LvK6yASva46FNMg52VIWjiNwtNrVGYHLyUmhBdb5NjtYzV2E7m2g2Ku5j4aacRXqhqhGAWVeljiC5Qo0oYsxkFOL4Oc6fCoEtRSpvkWqpSUFoL5FKjH27f8E6Gh044JujY9_zWUGvJIjdrLCaFz23VNQ0XhqDVkfyPTKdv6foC_JUIUb</recordid><startdate>20001010</startdate><enddate>20001010</enddate><creator>Schlößer, Dietmar C.</creator><creator>Morgenstern, Karina</creator><creator>Verheij, Laurens K.</creator><creator>Rosenfeld, Georg</creator><creator>Besenbacher, Flemming</creator><creator>Comsa, George</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8G</scope><scope>JG9</scope></search><sort><creationdate>20001010</creationdate><title>Kinetics of island diffusion on Cu(111) and Ag(111) studied with variable-temperature STM</title><author>Schlößer, Dietmar C. ; Morgenstern, Karina ; Verheij, Laurens K. ; Rosenfeld, Georg ; Besenbacher, Flemming ; Comsa, George</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c414t-69f70fed2b11949aa3383b4287bb7149c177ed594f71071dafb2e0f3ef98a81b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Applied sciences</topic><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>Copper</topic><topic>Diffusion and migration</topic><topic>Diffusion; interface formation</topic><topic>Exact sciences and technology</topic><topic>Metals. Metallurgy</topic><topic>Physics</topic><topic>Scanning tunneling microscopy</topic><topic>Solid surfaces and solid-solid interfaces</topic><topic>Surface diffusion</topic><topic>Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Schlößer, Dietmar C.</creatorcontrib><creatorcontrib>Morgenstern, Karina</creatorcontrib><creatorcontrib>Verheij, Laurens K.</creatorcontrib><creatorcontrib>Rosenfeld, Georg</creatorcontrib><creatorcontrib>Besenbacher, Flemming</creatorcontrib><creatorcontrib>Comsa, George</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><jtitle>Surface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Schlößer, Dietmar C.</au><au>Morgenstern, Karina</au><au>Verheij, Laurens K.</au><au>Rosenfeld, Georg</au><au>Besenbacher, Flemming</au><au>Comsa, George</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Kinetics of island diffusion on Cu(111) and Ag(111) studied with variable-temperature STM</atitle><jtitle>Surface science</jtitle><date>2000-10-10</date><risdate>2000</risdate><volume>465</volume><issue>1</issue><spage>19</spage><epage>39</epage><pages>19-39</pages><issn>0039-6028</issn><eissn>1879-2758</eissn><coden>SUSCAS</coden><abstract>The diffusion of vacancy islands on Cu(111) and Ag(111) and of adatom islands on Ag(111) has been studied using fast scanning STM. Diffusion of atoms along island edges (periphery diffusion) is much more effective in contributing to the diffusion of the islands than diffusion of atoms via terrace sites, under the conditions considered in this work. Assuming power-law scaling of the diffusion coefficient with the size of the islands, effective exponents,
β, between 1.33 and 1.63 were determined. The effective diffusion barrier
E
d
was found to be 0.49
eV on Cu and between 0.51 and 0.53
eV on Ag, respectively. Activation energies for the diffusion of atoms along the island edges and for the breaking up of closed island edges (core breakup) were calculated using potentials derived from effective medium theory. Qualitative and quantitative comparisons between the measured and calculated activation energies for diffusion show that one cannot explain the island diffusion as being governed by one single rate-limiting process. The results are consistent with a mechanism for which both periphery diffusion and core breakup are rate-limiting for island diffusion.</abstract><cop>Lausanne</cop><cop>Amsterdam</cop><cop>New York, NY</cop><pub>Elsevier B.V</pub><doi>10.1016/S0039-6028(00)00682-8</doi><tpages>21</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Applied sciences Condensed matter: structure, mechanical and thermal properties Copper Diffusion and migration Diffusion interface formation Exact sciences and technology Metals. Metallurgy Physics Scanning tunneling microscopy Solid surfaces and solid-solid interfaces Surface diffusion Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) |
| title | Kinetics of island diffusion on Cu(111) and Ag(111) studied with variable-temperature STM |
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