Effect of annealing on the structure of carbon onions and the annealed carbon coated Ni nanoparticles fabricated by chemical vapor deposition
Structural evolutions of carbon onions and carbon coated nanocrystals of nickel during annealing process were investigated. X-ray diffraction, Raman and transmission electron microscope were used to investigate their structural variation. The results showed that annealing (700 °C) of the carbon onio...
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| Veröffentlicht in: | Journal of alloys and compounds 2009-03, Vol.472 (1), p.230-233 |
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| container_end_page | 233 |
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| container_issue | 1 |
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| container_title | Journal of alloys and compounds |
| container_volume | 472 |
| creator | He, C.N. Zhao, N.Q. Shi, C.S. Du, X.W. Li, J.J. |
| description | Structural evolutions of carbon onions and carbon coated nanocrystals of nickel during annealing process were investigated. X-ray diffraction, Raman and transmission electron microscope were used to investigate their structural variation. The results showed that annealing (700
°C) of the carbon onions resulted in the shrinkage of hollow core of carbon onions and reduction of the interlayer spacing between carbon onion shells. And the compressed onion structure took a perfect spheroidal shape. However, the structure of the annealed carbon coated Ni nanoparticles presented that the Ni nanoparticles (5–30
nm) escaped from carbon encapsulation and congregated to large Ni particles (30–180
nm), and the carbon coating was disintegrated to small disorder graphite pieces. When the Ni was removed from the carbon coated Ni nanoparticles and then was annealed at 700
°C for 4
h, it was found that these hollow carbon onions presented the similar structural evolution as the above carbon onions. |
| doi_str_mv | 10.1016/j.jallcom.2008.04.051 |
| format | Article |
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°C) of the carbon onions resulted in the shrinkage of hollow core of carbon onions and reduction of the interlayer spacing between carbon onion shells. And the compressed onion structure took a perfect spheroidal shape. However, the structure of the annealed carbon coated Ni nanoparticles presented that the Ni nanoparticles (5–30
nm) escaped from carbon encapsulation and congregated to large Ni particles (30–180
nm), and the carbon coating was disintegrated to small disorder graphite pieces. When the Ni was removed from the carbon coated Ni nanoparticles and then was annealed at 700
°C for 4
h, it was found that these hollow carbon onions presented the similar structural evolution as the above carbon onions.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2008.04.051</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Condensed matter: structure, mechanical and thermal properties ; Electron microscope ; Exact sciences and technology ; Fullerenes ; Fullerenes and fullerene-related materials ; Microstructure ; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals ; Nanostructures ; Physics ; Structure of solids and liquids; crystallography ; Vapor deposition</subject><ispartof>Journal of alloys and compounds, 2009-03, Vol.472 (1), p.230-233</ispartof><rights>2008 Elsevier B.V.</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-5024a9d3e1cc67fa600f51cf8cd1854134df87a0e072c228b0d5586241f58c1e3</citedby><cites>FETCH-LOGICAL-c370t-5024a9d3e1cc67fa600f51cf8cd1854134df87a0e072c228b0d5586241f58c1e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0925838808006580$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21279745$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>He, C.N.</creatorcontrib><creatorcontrib>Zhao, N.Q.</creatorcontrib><creatorcontrib>Shi, C.S.</creatorcontrib><creatorcontrib>Du, X.W.</creatorcontrib><creatorcontrib>Li, J.J.</creatorcontrib><title>Effect of annealing on the structure of carbon onions and the annealed carbon coated Ni nanoparticles fabricated by chemical vapor deposition</title><title>Journal of alloys and compounds</title><description>Structural evolutions of carbon onions and carbon coated nanocrystals of nickel during annealing process were investigated. X-ray diffraction, Raman and transmission electron microscope were used to investigate their structural variation. The results showed that annealing (700
°C) of the carbon onions resulted in the shrinkage of hollow core of carbon onions and reduction of the interlayer spacing between carbon onion shells. And the compressed onion structure took a perfect spheroidal shape. However, the structure of the annealed carbon coated Ni nanoparticles presented that the Ni nanoparticles (5–30
nm) escaped from carbon encapsulation and congregated to large Ni particles (30–180
nm), and the carbon coating was disintegrated to small disorder graphite pieces. When the Ni was removed from the carbon coated Ni nanoparticles and then was annealed at 700
°C for 4
h, it was found that these hollow carbon onions presented the similar structural evolution as the above carbon onions.</description><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Electron microscope</subject><subject>Exact sciences and technology</subject><subject>Fullerenes</subject><subject>Fullerenes and fullerene-related materials</subject><subject>Microstructure</subject><subject>Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals</subject><subject>Nanostructures</subject><subject>Physics</subject><subject>Structure of solids and liquids; crystallography</subject><subject>Vapor deposition</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkc9u1DAQxiNEJZa2j4DkC9wSxnacOCeEqvJHquBCz5Z3MqZeZe1geyv1IXhnvN2FKydr_P2-Gc03TfOGQ8eBD-933c4uC8Z9JwB0B30Hir9oNlyPsu2HYXrZbGASqtVS61fN65x3AMAnyTfN71vnCAuLjtkQyC4-_GQxsPJALJd0wHJIdFTRpm39j8HHkCs7PyMnD81_ZYy21OqbZ8GGuNpUPC6UmbPb5PFZ2z4xfKB9rRb2aNeY2ExrzL7UxlfNhbNLpuvze9ncf7r9cfOlvfv--evNx7sW5QilVSB6O82SOOIwOjsAOMXRaZy5Vj2X_ez0aIFgFCiE3sKslB5Ez53SyEleNu9OfdcUfx0oF7P3GWlZbKB4yEbKYZqA9xVUJxBTzDmRM2vye5ueDAdzDN_szDl8cwzfQG9q-NX39jzA5rqoSzagz__MgotxGntVuQ8njuq2j56SyegpIM0-1bOYOfr_TPoDDSafiQ</recordid><startdate>20090320</startdate><enddate>20090320</enddate><creator>He, C.N.</creator><creator>Zhao, N.Q.</creator><creator>Shi, C.S.</creator><creator>Du, X.W.</creator><creator>Li, J.J.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20090320</creationdate><title>Effect of annealing on the structure of carbon onions and the annealed carbon coated Ni nanoparticles fabricated by chemical vapor deposition</title><author>He, C.N. ; Zhao, N.Q. ; Shi, C.S. ; Du, X.W. ; Li, J.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-5024a9d3e1cc67fa600f51cf8cd1854134df87a0e072c228b0d5586241f58c1e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>Electron microscope</topic><topic>Exact sciences and technology</topic><topic>Fullerenes</topic><topic>Fullerenes and fullerene-related materials</topic><topic>Microstructure</topic><topic>Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals</topic><topic>Nanostructures</topic><topic>Physics</topic><topic>Structure of solids and liquids; crystallography</topic><topic>Vapor deposition</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>He, C.N.</creatorcontrib><creatorcontrib>Zhao, N.Q.</creatorcontrib><creatorcontrib>Shi, C.S.</creatorcontrib><creatorcontrib>Du, X.W.</creatorcontrib><creatorcontrib>Li, J.J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>He, C.N.</au><au>Zhao, N.Q.</au><au>Shi, C.S.</au><au>Du, X.W.</au><au>Li, J.J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of annealing on the structure of carbon onions and the annealed carbon coated Ni nanoparticles fabricated by chemical vapor deposition</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2009-03-20</date><risdate>2009</risdate><volume>472</volume><issue>1</issue><spage>230</spage><epage>233</epage><pages>230-233</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>Structural evolutions of carbon onions and carbon coated nanocrystals of nickel during annealing process were investigated. X-ray diffraction, Raman and transmission electron microscope were used to investigate their structural variation. The results showed that annealing (700
°C) of the carbon onions resulted in the shrinkage of hollow core of carbon onions and reduction of the interlayer spacing between carbon onion shells. And the compressed onion structure took a perfect spheroidal shape. However, the structure of the annealed carbon coated Ni nanoparticles presented that the Ni nanoparticles (5–30
nm) escaped from carbon encapsulation and congregated to large Ni particles (30–180
nm), and the carbon coating was disintegrated to small disorder graphite pieces. When the Ni was removed from the carbon coated Ni nanoparticles and then was annealed at 700
°C for 4
h, it was found that these hollow carbon onions presented the similar structural evolution as the above carbon onions.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2008.04.051</doi><tpages>4</tpages></addata></record> |
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| ispartof | Journal of alloys and compounds, 2009-03, Vol.472 (1), p.230-233 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Condensed matter: structure, mechanical and thermal properties Electron microscope Exact sciences and technology Fullerenes Fullerenes and fullerene-related materials Microstructure Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals Nanostructures Physics Structure of solids and liquids crystallography Vapor deposition |
| title | Effect of annealing on the structure of carbon onions and the annealed carbon coated Ni nanoparticles fabricated by chemical vapor deposition |
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