Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone
Fe–Pt nanoparticles of 3.5 nm in average particle diameter are obtained with the simultaneous chemical reduction of platinum acetylacetonate and the thermal decomposition of iron pentacarbonyl. Because the as-synthesized particles are superparamagnetic at room temperature, they must be transformed t...
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| Veröffentlicht in: | Electrochimica acta 2005-11, Vol.51 (5), p.860-863 |
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| container_title | Electrochimica acta |
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| creator | Chen, Mu-Pei Kuroishi, Kazuya Kitamoto, Yoshitaka |
| description | Fe–Pt nanoparticles of 3.5
nm in average particle diameter are obtained with the simultaneous chemical reduction of platinum acetylacetonate and the thermal decomposition of iron pentacarbonyl. Because the as-synthesized particles are superparamagnetic at room temperature, they must be transformed to L1
0 ordered phase by annealing at temperatures above 773
K to apply to high-density magnetic recording media. However, the annealing at such high temperatures induces the coalescence and inter-particle sintering. In the present paper, to solve the problem caused by the annealing, we use ultraviolet-ozone treatment to modify particle surface. Even after annealing at 773
K, the crystalline size is kept at 4.4
nm. Furthermore, coercivity is higher than that without the ultraviolet-ozone treatment. |
| doi_str_mv | 10.1016/j.electacta.2005.04.060 |
| format | Article |
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nm in average particle diameter are obtained with the simultaneous chemical reduction of platinum acetylacetonate and the thermal decomposition of iron pentacarbonyl. Because the as-synthesized particles are superparamagnetic at room temperature, they must be transformed to L1
0 ordered phase by annealing at temperatures above 773
K to apply to high-density magnetic recording media. However, the annealing at such high temperatures induces the coalescence and inter-particle sintering. In the present paper, to solve the problem caused by the annealing, we use ultraviolet-ozone treatment to modify particle surface. Even after annealing at 773
K, the crystalline size is kept at 4.4
nm. Furthermore, coercivity is higher than that without the ultraviolet-ozone treatment.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2005.04.060</identifier><identifier>CODEN: ELCAAV</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Chemistry ; Colloidal state and disperse state ; Exact sciences and technology ; Fe–Pt ; General and physical chemistry ; Nanoparticle ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Self-assembly ; Ultraviolet-ozone treatment</subject><ispartof>Electrochimica acta, 2005-11, Vol.51 (5), p.860-863</ispartof><rights>2005 Elsevier Ltd</rights><rights>2006 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c366t-35c7d993e5cca85408da297801faea5ee6d9ca0b63e28e40cf118934146f0dd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0013468605006924$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,3537,23909,23910,25118,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17608316$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Chen, Mu-Pei</creatorcontrib><creatorcontrib>Kuroishi, Kazuya</creatorcontrib><creatorcontrib>Kitamoto, Yoshitaka</creatorcontrib><title>Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone</title><title>Electrochimica acta</title><description>Fe–Pt nanoparticles of 3.5
nm in average particle diameter are obtained with the simultaneous chemical reduction of platinum acetylacetonate and the thermal decomposition of iron pentacarbonyl. Because the as-synthesized particles are superparamagnetic at room temperature, they must be transformed to L1
0 ordered phase by annealing at temperatures above 773
K to apply to high-density magnetic recording media. However, the annealing at such high temperatures induces the coalescence and inter-particle sintering. In the present paper, to solve the problem caused by the annealing, we use ultraviolet-ozone treatment to modify particle surface. Even after annealing at 773
K, the crystalline size is kept at 4.4
nm. Furthermore, coercivity is higher than that without the ultraviolet-ozone treatment.</description><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>Fe–Pt</subject><subject>General and physical chemistry</subject><subject>Nanoparticle</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Self-assembly</subject><subject>Ultraviolet-ozone treatment</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqFkEFP3DAQhS0EUhfKb6gv7S1hvE4c57hCLVRC4lDgas06Y-pVYm9tb6vl15PVonJEGmnm8L33NI-xLwJqAUJdbWoayRacp14CtDU0NSg4YQuhO1lJ3fanbAEgZNUorT6x85w3ANCpDhbs8dcuObTESyIsE4XCo-OOUooTPgcq3vKAIW4xzedIFeZM03rc8_WePz5xnxIOHouPgf_z5TePLzHQZ3bmcMx0-bYv2MOP7w_Xt9Xd_c3P69VdZaVSpZKt7Ya-l9Rai7ptQA-47DsNwiFhS6SG3iKslaSlpgasE0L3shGNcjAM8oJ9O9puU_yzo1zM5LOlccRAcZfNshd9q5p2BrsjaFPMOZEz2-QnTHsjwBxaNBvzv0VzaNFAY-YWZ-XXtwjMFkeXMFif3-WdAi2FmrnVkaP53b-eksnWU7A0-DT7miH6D7NeAXt3jhg</recordid><startdate>20051110</startdate><enddate>20051110</enddate><creator>Chen, Mu-Pei</creator><creator>Kuroishi, Kazuya</creator><creator>Kitamoto, Yoshitaka</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20051110</creationdate><title>Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone</title><author>Chen, Mu-Pei ; Kuroishi, Kazuya ; Kitamoto, Yoshitaka</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c366t-35c7d993e5cca85408da297801faea5ee6d9ca0b63e28e40cf118934146f0dd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Exact sciences and technology</topic><topic>Fe–Pt</topic><topic>General and physical chemistry</topic><topic>Nanoparticle</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Self-assembly</topic><topic>Ultraviolet-ozone treatment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Mu-Pei</creatorcontrib><creatorcontrib>Kuroishi, Kazuya</creatorcontrib><creatorcontrib>Kitamoto, Yoshitaka</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Mu-Pei</au><au>Kuroishi, Kazuya</au><au>Kitamoto, Yoshitaka</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone</atitle><jtitle>Electrochimica acta</jtitle><date>2005-11-10</date><risdate>2005</risdate><volume>51</volume><issue>5</issue><spage>860</spage><epage>863</epage><pages>860-863</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><coden>ELCAAV</coden><abstract>Fe–Pt nanoparticles of 3.5
nm in average particle diameter are obtained with the simultaneous chemical reduction of platinum acetylacetonate and the thermal decomposition of iron pentacarbonyl. Because the as-synthesized particles are superparamagnetic at room temperature, they must be transformed to L1
0 ordered phase by annealing at temperatures above 773
K to apply to high-density magnetic recording media. However, the annealing at such high temperatures induces the coalescence and inter-particle sintering. In the present paper, to solve the problem caused by the annealing, we use ultraviolet-ozone treatment to modify particle surface. Even after annealing at 773
K, the crystalline size is kept at 4.4
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| ispartof | Electrochimica acta, 2005-11, Vol.51 (5), p.860-863 |
| issn | 0013-4686 1873-3859 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Chemistry Colloidal state and disperse state Exact sciences and technology Fe–Pt General and physical chemistry Nanoparticle Physical and chemical studies. Granulometry. Electrokinetic phenomena Self-assembly Ultraviolet-ozone treatment |
| title | Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone |
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