Bimodal growth of Au on SrTiO3(001).
We have investigated the vapor phase growth of Au on SrTiO3(001)-(2 x 1) substrates by UHV scanning tunneling microscopy. Submonolayer (ML) coverages below 300 degrees C wet the surface as disordered metastable 2D islands. Beyond 0.75 ML fcc nanocrystals with a (111) interface are nucleated and ripe...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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2006
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| _version_ | 1826263369105014784 |
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| author | Silly, F Castell, M |
| author_facet | Silly, F Castell, M |
| author_sort | Silly, F |
| collection | OXFORD |
| description | We have investigated the vapor phase growth of Au on SrTiO3(001)-(2 x 1) substrates by UHV scanning tunneling microscopy. Submonolayer (ML) coverages below 300 degrees C wet the surface as disordered metastable 2D islands. Beyond 0.75 ML fcc nanocrystals with a (111) interface are nucleated and ripen by dewetting the surrounding layer. Some multiply twinned fivefold symmetric clusters are also created. Above 400 degrees C dewetting occurs for all coverages and the surface is only populated by nanocrystals and fivefold clusters. A planar ground state configuration for small Au clusters and a higher interface energy for crystals than for wetted 2D ML films explains these results. |
| first_indexed | 2024-03-06T19:50:40Z |
| format | Journal article |
| id | oxford-uuid:23df866d-3c17-44da-ad6b-0069077ecdce |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:50:40Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:23df866d-3c17-44da-ad6b-0069077ecdce2022-03-26T11:46:37ZBimodal growth of Au on SrTiO3(001).Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:23df866d-3c17-44da-ad6b-0069077ecdceEnglishSymplectic Elements at Oxford2006Silly, FCastell, MWe have investigated the vapor phase growth of Au on SrTiO3(001)-(2 x 1) substrates by UHV scanning tunneling microscopy. Submonolayer (ML) coverages below 300 degrees C wet the surface as disordered metastable 2D islands. Beyond 0.75 ML fcc nanocrystals with a (111) interface are nucleated and ripen by dewetting the surrounding layer. Some multiply twinned fivefold symmetric clusters are also created. Above 400 degrees C dewetting occurs for all coverages and the surface is only populated by nanocrystals and fivefold clusters. A planar ground state configuration for small Au clusters and a higher interface energy for crystals than for wetted 2D ML films explains these results. |
| spellingShingle | Silly, F Castell, M Bimodal growth of Au on SrTiO3(001). |
| title | Bimodal growth of Au on SrTiO3(001). |
| title_full | Bimodal growth of Au on SrTiO3(001). |
| title_fullStr | Bimodal growth of Au on SrTiO3(001). |
| title_full_unstemmed | Bimodal growth of Au on SrTiO3(001). |
| title_short | Bimodal growth of Au on SrTiO3(001). |
| title_sort | bimodal growth of au on srtio3 001 |
| work_keys_str_mv | AT sillyf bimodalgrowthofauonsrtio3001 AT castellm bimodalgrowthofauonsrtio3001 |