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姓名 賴亮杰(Liang-jie Lai) 查詢紙本館藏 畢業系所 物理學系 論文名稱 液態乳膠中微粒子在含有高分子鏈油滴表面上的堆疊
(Polymer-mediated Microsphere Packing in Liquid Emulsion Droplets)相關論文 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] [檢視] [下載]
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摘要(中) 我們在水包油的乳膠中觀察到新式的膠體叢聚。在這乳膠中,油滴裡分散著高分子鏈,而其表面也有許多膠體微粒會貼近在上面,尤其這些高分子鏈會引發膠體微粒間的空乏力作用。當油滴裡的膠體微粒數N大於4的時候,我們觀察到相對於N有多於一種的堆積組態。我們可以將這些組態細分成三個種類:第一種是滿足最小二價矩(minimal second moment)的叢聚;第二種是滿足球面堆積的叢聚;第三種是非等邊多面叢聚。它們都是由不同的機制所形成。很顯然的,微粒子的初始堆疊狀態以及乳膠油滴裡的高分子鏈濃度,兩者都在最終堆疊結果上扮演著重要的腳色。 摘要(英) We observed new types of colloidal clusters produced from oil-in-water emulsions in which colloidal microspheres are attached to emulsion surface and polymer dispersed in oil phase. The polymer induces depletion interaction between microspheres. When the number of particles N inside the droplet is larger than 4, we observed more than one configurations for each N. We classified the configurations into three catogories: The first kind is a minimal second moment cluster; the second kind is a spherical packing cluster; the third kind is a non-equilateral polyhedron cluster. They are formed through different mechanisms. Both initial packing of microspheres and the concentration of polymer in emulsion droplets play roles in their final packing. 關鍵字(中) ★ 球表面的最佳堆疊
★ 膠體叢聚
★ 乳膠
★ 油滴
★ 微米球關鍵字(英) ★ optimal packing on the sphere
★ colloidal cluster
★ emulsion
★ droplet
★ microsphere論文目次 1 Introduction 1
2 Polymer Mediated Interaction Between Microspheres 7
3 Experimental details 11
3.1 Fabrication process 11
3.2 Polymer suspension 12
3.3 Density gradient 16
3.4 Shrinking observation 17
4 Results and discussion 22
5 Conclusion 25參考文獻 [1] T.C. Hales, Discrete Comput. Geom. 17, 1 (1997).
[2] T.C. Hales, Discrete Comput. Geom. 18, 135 (1997).
[3] T. Aste and D. Weaire, The Pursuit of Perfect Packing (Institute of Physics Publishing Bristol, (2000).
[4] V.N. Manoharan, M.T. Elsesser, and D.J. Pine, Science 301, 483 (2003).
[5] E. Lauga, and M. P. Brenner, Phys. Rev. Lett. 93, 238301 (2004).
[6] A. Vrij, Pure and Applied Chemistry 48, 471 (1976).
[7] J. C. Crocker, J. A. Matteo, A. D. Dinsmore, and A. G. Yodh, Phys. Rev. Lett. 82, 4352 (1999).
[8] J.-L. Ou, M.-H. Wu, and H. Chen, J. Mater. Sci. Lett. 20, 2221 (2001).指導教授 林耿慧(Keng-hui Lin) 審核日期 2007-7-6 推文 facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu 網路書籤 Google bookmarks del.icio.us hemidemi myshare