Coalescence and sintering of Pt nanoparticles: in situ observation by aberration-corrected HAADF STEM
An aberration-corrected JEOL 2200FS scanning-transmission electron microscope (STEM), equipped with a high-angle annular dark-field detector (HAADF), is used to monitor the coalescence and sintering of Pt nanoparticles with an average diameter of 2.8 nm. This in situ STEM capability is combined with...
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| Veröffentlicht in: | Nanotechnology 2010-01, Vol.21 (2), p.025701-025701 |
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| creator | Asoro, M A Kovar, D Shao-Horn, Y Allard, L F Ferreira, P J |
| description | An aberration-corrected JEOL 2200FS scanning-transmission electron microscope (STEM), equipped with a high-angle annular dark-field detector (HAADF), is used to monitor the coalescence and sintering of Pt nanoparticles with an average diameter of 2.8 nm. This in situ STEM capability is combined with an analysis methodology that together allows direct measurements of mass transport phenomena that are important in understanding how particle size influences coalescence and sintering at the nanoscale. To demonstrate the feasibility of this methodology, the surface diffusivity is determined from measurements obtained from STEM images acquired during the initial stages of sintering. The measured surface diffusivities are in reasonable agreement with measurements made on the surface of nanoparticles, using other techniques. In addition, the grain boundary mobility is determined from measurements made during the latter stages of sintering. |
| doi_str_mv | 10.1088/0957-4484/21/2/025701 |
| format | Article |
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In addition, the grain boundary mobility is determined from measurements made during the latter stages of sintering.</description><identifier>ISSN: 0957-4484</identifier><identifier>EISSN: 1361-6528</identifier><identifier>DOI: 10.1088/0957-4484/21/2/025701</identifier><identifier>PMID: 19955618</identifier><language>eng</language><publisher>England: IOP Publishing</publisher><subject>Aberration ; Coalescence ; Coalescing ; Crystallization - methods ; Hot Temperature ; Image Enhancement - methods ; Macromolecular Substances - chemistry ; Materials Testing - methods ; Methodology ; Microscopy, Electron, Scanning Transmission - methods ; Molecular Conformation ; Nanoparticles ; Nanoparticles - chemistry ; Nanoparticles - ultrastructure ; Nanostructure ; Nanotechnology - methods ; Particle Size ; Platinum - chemistry ; Scanning transmission electron microscopy ; Sintering ; Surface Properties</subject><ispartof>Nanotechnology, 2010-01, Vol.21 (2), p.025701-025701</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c418t-8d5b699dc8874f6b09717a7432a2d22e60da53b11a123d9ee0b2f8e0559e05be3</citedby><cites>FETCH-LOGICAL-c418t-8d5b699dc8874f6b09717a7432a2d22e60da53b11a123d9ee0b2f8e0559e05be3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/0957-4484/21/2/025701/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,776,780,27901,27902,53805,53885</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19955618$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Asoro, M A</creatorcontrib><creatorcontrib>Kovar, D</creatorcontrib><creatorcontrib>Shao-Horn, Y</creatorcontrib><creatorcontrib>Allard, L F</creatorcontrib><creatorcontrib>Ferreira, P J</creatorcontrib><title>Coalescence and sintering of Pt nanoparticles: in situ observation by aberration-corrected HAADF STEM</title><title>Nanotechnology</title><addtitle>Nanotechnology</addtitle><description>An aberration-corrected JEOL 2200FS scanning-transmission electron microscope (STEM), equipped with a high-angle annular dark-field detector (HAADF), is used to monitor the coalescence and sintering of Pt nanoparticles with an average diameter of 2.8 nm. This in situ STEM capability is combined with an analysis methodology that together allows direct measurements of mass transport phenomena that are important in understanding how particle size influences coalescence and sintering at the nanoscale. To demonstrate the feasibility of this methodology, the surface diffusivity is determined from measurements obtained from STEM images acquired during the initial stages of sintering. The measured surface diffusivities are in reasonable agreement with measurements made on the surface of nanoparticles, using other techniques. In addition, the grain boundary mobility is determined from measurements made during the latter stages of sintering.</description><subject>Aberration</subject><subject>Coalescence</subject><subject>Coalescing</subject><subject>Crystallization - methods</subject><subject>Hot Temperature</subject><subject>Image Enhancement - methods</subject><subject>Macromolecular Substances - chemistry</subject><subject>Materials Testing - methods</subject><subject>Methodology</subject><subject>Microscopy, Electron, Scanning Transmission - methods</subject><subject>Molecular Conformation</subject><subject>Nanoparticles</subject><subject>Nanoparticles - chemistry</subject><subject>Nanoparticles - ultrastructure</subject><subject>Nanostructure</subject><subject>Nanotechnology - methods</subject><subject>Particle Size</subject><subject>Platinum - chemistry</subject><subject>Scanning transmission electron microscopy</subject><subject>Sintering</subject><subject>Surface Properties</subject><issn>0957-4484</issn><issn>1361-6528</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqF0c9PHCEUB3DStKlb7Z-g4daL0-UxAwPeNlt_NLHRRHsmMLwx0-zCCLNN_O9luxs91LQXCOHzHvCFkGNgX4EpNWdatFXTqGbOYc7njIuWwTsyg1pCJQVX78nsxRyQTzn_YgxAcfhIDkBrISSoGcFltCvMHYYOqQ2e5iFMmIbwQGNPbycabIijTdPQFXZGh1DEtKHRZUy_7TTEQN0TtQ5T-rOqupgSdhN6erVYfLugd_fnP47Ih96uMn7ez4fk58X5_fKqur65_L5cXFddA2qqlBdOau07pdqml47pFlrbNjW33HOOknkragdggddeIzLHe4VMCF0Gh_Uh-bLrO6b4uME8mfVQ3rZa2YBxk40SJSUtlfivbOsGpAbZFCl2sksx54S9GdOwtunJADPbrzDbmM02ZsPBcLP7ilJ3sj9h49boX6v22RdwugNDHF923-xlRt8Xzv7m_77CM7m8n1Y</recordid><startdate>20100115</startdate><enddate>20100115</enddate><creator>Asoro, M A</creator><creator>Kovar, D</creator><creator>Shao-Horn, Y</creator><creator>Allard, L F</creator><creator>Ferreira, P J</creator><general>IOP Publishing</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20100115</creationdate><title>Coalescence and sintering of Pt nanoparticles: in situ observation by aberration-corrected HAADF STEM</title><author>Asoro, M A ; Kovar, D ; Shao-Horn, Y ; Allard, L F ; Ferreira, P J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c418t-8d5b699dc8874f6b09717a7432a2d22e60da53b11a123d9ee0b2f8e0559e05be3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Aberration</topic><topic>Coalescence</topic><topic>Coalescing</topic><topic>Crystallization - methods</topic><topic>Hot Temperature</topic><topic>Image Enhancement - methods</topic><topic>Macromolecular Substances - chemistry</topic><topic>Materials Testing - methods</topic><topic>Methodology</topic><topic>Microscopy, Electron, Scanning Transmission - methods</topic><topic>Molecular Conformation</topic><topic>Nanoparticles</topic><topic>Nanoparticles - chemistry</topic><topic>Nanoparticles - ultrastructure</topic><topic>Nanostructure</topic><topic>Nanotechnology - methods</topic><topic>Particle Size</topic><topic>Platinum - chemistry</topic><topic>Scanning transmission electron microscopy</topic><topic>Sintering</topic><topic>Surface Properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Asoro, M A</creatorcontrib><creatorcontrib>Kovar, D</creatorcontrib><creatorcontrib>Shao-Horn, Y</creatorcontrib><creatorcontrib>Allard, L F</creatorcontrib><creatorcontrib>Ferreira, P J</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Nanotechnology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Asoro, M A</au><au>Kovar, D</au><au>Shao-Horn, Y</au><au>Allard, L F</au><au>Ferreira, P J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Coalescence and sintering of Pt nanoparticles: in situ observation by aberration-corrected HAADF STEM</atitle><jtitle>Nanotechnology</jtitle><addtitle>Nanotechnology</addtitle><date>2010-01-15</date><risdate>2010</risdate><volume>21</volume><issue>2</issue><spage>025701</spage><epage>025701</epage><pages>025701-025701</pages><issn>0957-4484</issn><eissn>1361-6528</eissn><abstract>An aberration-corrected JEOL 2200FS scanning-transmission electron microscope (STEM), equipped with a high-angle annular dark-field detector (HAADF), is used to monitor the coalescence and sintering of Pt nanoparticles with an average diameter of 2.8 nm. This in situ STEM capability is combined with an analysis methodology that together allows direct measurements of mass transport phenomena that are important in understanding how particle size influences coalescence and sintering at the nanoscale. To demonstrate the feasibility of this methodology, the surface diffusivity is determined from measurements obtained from STEM images acquired during the initial stages of sintering. The measured surface diffusivities are in reasonable agreement with measurements made on the surface of nanoparticles, using other techniques. In addition, the grain boundary mobility is determined from measurements made during the latter stages of sintering.</abstract><cop>England</cop><pub>IOP Publishing</pub><pmid>19955618</pmid><doi>10.1088/0957-4484/21/2/025701</doi><tpages>1</tpages></addata></record> |
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| subjects | Aberration Coalescence Coalescing Crystallization - methods Hot Temperature Image Enhancement - methods Macromolecular Substances - chemistry Materials Testing - methods Methodology Microscopy, Electron, Scanning Transmission - methods Molecular Conformation Nanoparticles Nanoparticles - chemistry Nanoparticles - ultrastructure Nanostructure Nanotechnology - methods Particle Size Platinum - chemistry Scanning transmission electron microscopy Sintering Surface Properties |
| title | Coalescence and sintering of Pt nanoparticles: in situ observation by aberration-corrected HAADF STEM |
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