DC Field | Value | Language |
---|---|---|
dc.contributor.author | Nghiem, Quoc Dat | ko |
dc.contributor.author | Kim, Dong-Pyo | ko |
dc.contributor.author | Kim, Sang Ouk | ko |
dc.date.accessioned | 2011-03-17T05:47:00Z | - |
dc.date.available | 2011-03-17T05:47:00Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2008-10 | - |
dc.identifier.citation | JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.8, no.10, pp.5527 - 5531 | - |
dc.identifier.issn | 1533-4880 | - |
dc.identifier.uri | http://hdl.handle.net/10203/22729 | - |
dc.description.abstract | The fabrication of SiC ceramic materials with an ordered nanostructure through the direct pyrolysis of a self-assembled inorganic-organic block copolymer has generally been unsuccessful even though the versatile processibility has been demonstrated with organic-organic block copolymers. Here we report the synthesis of a novel polycarbosilane-block-poly(methyl methacrylate) diblock copolymer through ring-opening living anionic polymerization in a THF and n-hexane solvent system at -48 degrees C. The resulting block copolymer exhibited phase-separation behavior on the nanoscale to form a self-assembled nanostructure that was converted to a mesoporous ceramic after heating at 800 degrees C. The characterization of diblock copolymer is simultaneously investigated by GPC, and NMR analyses. The self-assembly of diblock copolymer is characterized by small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), and scanning electron microscopy (SEM). In particular, the preparation of high-temperature-stable nanostructured silicon carbide and mesoporous silicon carbide ceramic directed from cross-linked polycarbosilane blocks with a high ceramic yield are described, which exhibits well-oriented nanostructures with the size in a range of 4-10 nm. These exciting results have a great potential to open a new field for the generation of nanostructured non-oxide ceramic or metal-ceramic materials for a broad class of applications. | - |
dc.description.sponsorship | This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Lab.grant funded by the Korea government (MEST) (No.R0A20040001036702007 and No.R0A-2008-000-20057-0), and by a grant (08K1401-01010) from Center for Nanoscale Mechatronics & Manufacturing, one of the 21st Century Frontier Research Programs, which are supported by Ministry of Education, Science and Technology, KOREA.W e wish to thank the Korea Basic Science Institute (KBSI) for the NMR analysis. | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | AMER SCIENTIFIC PUBLISHERS | - |
dc.subject | BLOCK-COPOLYMER | - |
dc.subject | NANOPARTICLES | - |
dc.subject | PRECURSOR | - |
dc.subject | MICELLES | - |
dc.subject | PATTERNS | - |
dc.subject | SILICA | - |
dc.title | Well-Ordered Nanostructure SiC Ceramic Derived from Self-Assembly of Polycarbosilane-Block-Poly(methyl methacrylate) Diblock Copolymer | - |
dc.type | Article | - |
dc.identifier.wosid | 000261390500131 | - |
dc.identifier.scopusid | 2-s2.0-58149238161 | - |
dc.type.rims | ART | - |
dc.citation.volume | 8 | - |
dc.citation.issue | 10 | - |
dc.citation.beginningpage | 5527 | - |
dc.citation.endingpage | 5531 | - |
dc.citation.publicationname | JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Kim, Sang Ouk | - |
dc.contributor.nonIdAuthor | Nghiem, Quoc Dat | - |
dc.contributor.nonIdAuthor | Kim, Dong-Pyo | - |
dc.type.journalArticle | Article; Proceedings Paper | - |
dc.subject.keywordAuthor | Self-Assembly | - |
dc.subject.keywordAuthor | Block Copolymers | - |
dc.subject.keywordAuthor | Nanostructured Ceramics | - |
dc.subject.keywordAuthor | Mesoporous SiC | - |
dc.subject.keywordPlus | BLOCK-COPOLYMER | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | PRECURSOR | - |
dc.subject.keywordPlus | MICELLES | - |
dc.subject.keywordPlus | PATTERNS | - |
dc.subject.keywordPlus | SILICA | - |
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