Difference between revisions of "Mesoscale Self-Assembly: Capillary Bonds and Negative Menisci"
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In their paper, Whitesides and coworkers float a layer of millimeter-sized PDMS [http://en.wikipedia.org/wiki/Polydimethylsiloxane] hexagons between perfluorodecalin (PFD) and water. They further pre-treat different edges of the hexagons, making them either hydrophilic (by oxidizing the edges with a plasma cleaner) or hydrophobic (by protecting the edges from oxidation with an additional cured layer of PDMS). By carefully agitating the solutions, the authors are able to induce self-assembly over the course of minutes to hours, and observe how structure varies with different patterns of hydrophobicity/hydrophilicity. | In their paper, Whitesides and coworkers float a layer of millimeter-sized PDMS [http://en.wikipedia.org/wiki/Polydimethylsiloxane] hexagons between perfluorodecalin (PFD) and water. They further pre-treat different edges of the hexagons, making them either hydrophilic (by oxidizing the edges with a plasma cleaner) or hydrophobic (by protecting the edges from oxidation with an additional cured layer of PDMS). By carefully agitating the solutions, the authors are able to induce self-assembly over the course of minutes to hours, and observe how structure varies with different patterns of hydrophobicity/hydrophilicity. | ||
| − | This article was written as a sister article to another publication [http://pubs.acs.org.ezp-prod1.hul.harvard.edu/doi/full/10.1021/ja983882z]. In that paper, the authors used PDMS with a density of 1.05 g/cm^3, barely greater than than of water | + | This article was written as a sister article to another publication [http://pubs.acs.org.ezp-prod1.hul.harvard.edu/doi/full/10.1021/ja983882z]. In that paper, the authors used PDMS with a density of 1.05 g/cm<math>^3</math>, barely greater than than of water |
Revision as of 19:14, 23 February 2009
Zach Wissner-Gross (February 23, 2009)
Information
Mesoscale Self-Assembly: Capillary Bonds and Negative Menisci [1]
Ned Bowden, Scott R. J. Oliver, and George M. Whitesides
The Journal of Physical Chemistry B, 2000, 104 (12), 2714-2724
Softmatter Keywords
Capillary forces, self-assembly, menisci, capillary length
Summary
In their paper, Whitesides and coworkers float a layer of millimeter-sized PDMS [2] hexagons between perfluorodecalin (PFD) and water. They further pre-treat different edges of the hexagons, making them either hydrophilic (by oxidizing the edges with a plasma cleaner) or hydrophobic (by protecting the edges from oxidation with an additional cured layer of PDMS). By carefully agitating the solutions, the authors are able to induce self-assembly over the course of minutes to hours, and observe how structure varies with different patterns of hydrophobicity/hydrophilicity.
This article was written as a sister article to another publication [3]. In that paper, the authors used PDMS with a density of 1.05 g/cm<math>^3</math>, barely greater than than of water
