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DC Field | Value | Language |
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dc.citation.endPage | 352 | - |
dc.citation.number | 1-2 | - |
dc.citation.startPage | 346 | - |
dc.citation.title | WEAR | - |
dc.citation.volume | 200 | - |
dc.contributor.author | Cho, Yoon-Kyoung | - |
dc.contributor.author | Granick, Steve | - |
dc.date.accessioned | 2023-12-22T12:38:27Z | - |
dc.date.available | 2023-12-22T12:38:27Z | - |
dc.date.created | 2014-09-05 | - |
dc.date.issued | 1996-12 | - |
dc.description.abstract | To understand the dependence of nanorheology on molecular architecture for perfluorinated molecules, studies were performed using two lubricants commonly used in the magnetic storage industry. Experiments mimicked a single asperity by confining liquids to molecular spacings between atomically smooth mica and applying oscillatory shear forces. The force-distance profiles were compared. Large differences were obtained for the linear shear response. The elastic and dissipative shear moduli of a branched perfluoropolymer (Krytox-AZ) were comparable even at high loads, signifying that the fluid remained fluid-like over experimental frequencies. However, linear perfluoropolymer (Demmim S-20) was easily solidified. The nonlinear responses were also surprising. Previously, we (G. Reiter et al., Science 263 (1994) 1741) reported that the shear-induced transition from an elastic state (at rest) to a dissipative state (during sliding) was discontinuous and hysteric for various hydrocarbon fluids but not for the perfluorinated chain, perfluoroheptaglyme. However, the stick-slip transition was discontinuous, and even more hysteretic for the linear perfluoropolymer (Demnum S-20). | - |
dc.identifier.bibliographicCitation | WEAR, v.200, no.1-2, pp.346 - 352 | - |
dc.identifier.doi | 10.1016/S0043-1648(96)07296-1 | - |
dc.identifier.issn | 0043-1648 | - |
dc.identifier.scopusid | 2-s2.0-0030400192 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/5923 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0030400192 | - |
dc.identifier.wosid | A1996WB65100032 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Shear of confined perfluorinated molecules: Effect of side branching | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.description.journalRegisteredClass | scopus | - |
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