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RISS 인기검색어
- 검색키워드
- 저자 : Woan Karran V. (검색결과 2 건)
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Woan, Karran V.,Sigmund, Wolfgang M. American Chemical Society 2011 Langmuir Vol.27 No.9
<P>Force interactions of porous silica particles against mirror-polished stainless steel surfaces were quantified in the presence of various solvents to facilitate processing of ceramics with less reliance on organic aids which subsequently need to be burned off. The results were compared to and found to be in good agreement to idealized models of van der Waals force interactions. Significantly, van der Waals attractive forces between steel surfaces and silica surfaces were minimized through the use of tetrahydrofuran and enhanced using methanol. The solvent selections were further extended to settling behavior and were found to follow the general trends determined by Stokes law. The methods presented herein can be extended to other real-world systems.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2011/langd5.2011.27.issue-9/la200157v/production/images/medium/la-2011-00157v_0005.gif'></P>
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Electrospinning of nanofiber Chevrel phase materials
Woan, Karran V.,Scheffler, Raymond H.,Bell, Nelson S.,Sigmund, Wolfgang M. Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.24
<P>A modified sol–gel synthesis for non-oxide sulfide ceramics is presented. Sols are electrospun into continuous nanofiber precursors and then heat treated to obtain Chevrel-phase sulfide materials. In particular, the Mg-Chevrel fibers formed have average diameters of 230 ± 57 nm with grain sizes of 10 ± 3 nm after heat-treatment.</P> <P>Graphic Abstract</P><P>A modified sol–gel synthesis for non-oxide sulfide ceramics is presented. Sols are electrospun into continuous nanofiber Mg-Chevrel and Cu-Chevrel phase sulfide materials. The fibers formed have diameters of 100–300 nm with grain sizes of 10–30 nm after heat treatment. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm10378d'> </P>
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