Mesoscale self-assembly: Capillary interactions when positive and negative menisci have similar amplitudes

Langmuir

Volumn 19, Issue 6, 2003, Pages 2206-2214

  Wolfe, Daniel B ^a   Snead, Aaron ^a   Mao, Chengde ^a   Bowden, Ned B ^a   Whitesides, George M ^a  

^a HARVARD UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CAPILLARY FORCES;

AGGREGATES; ALUMINA; DENSITY (SPECIFIC GRAVITY); HYDROPHOBICITY; PHASE INTERFACES;

SELF ASSEMBLY;

EID: 0037453661     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la0264973     Document Type: Article

References (19)

1. Bowden, N.; Choi, I. S.; Grzybowski, B. A.; Whitesides, G. M. J. Am. Chem. Soc. 1999, 121, 5373-5391.
2. Bowden, N.; Oliver, S. R. J.; Whitesides, G. M. J. Phys. Chem. B 2000, 104, 2714-2724.
3. 4 larger than that of a 100-μm-sized plate. (See ref 2.)
4. Bowden, N.; Arias, F.; Deng, T.; Whitesides, G. M. Langmuir 2001, 17, 1757-1765.
5. Paunov, V. N.; Kralchevsky, P. A.; Denkov, N. D.; Nagayama, K. J. Colloid Interface Sci. 1993, 157, 100-112.
6. Kralchevsky, P. A.; Paunov, V. N.; Denkov, N. D.; Ivanov, I. B.; Nagayama, K. J. Colloid Interface Sci. 1993, 155, 420-437.
7. Kralchevsky, P. A.; Nagayama, K. Langmuir 1994, 10, 23-36.
8. Gao, C. Appl. Phys. Lett. 1997, 71, 1801-1803.
9. Fortes, M. A. Can. J. Chem. 1982, 60, 2889-2895.
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11. Grzybowski, B. A.; Bowden, N.; Arias, F.; Yang, H.; Whitesides, G. M. J. Phys. Chem. B 2001, 106, 404-412.
12. 3. This small difference in wetting did not appear to have an effect on the assemblies observed in our previous studies. (See ref 2.)
13. -1 yielded less ordered and less reproducible results than those carried out at higher rates of agitation.
14. The hydrophobic faces are labeled as numbers in square brackets. For example, a [1,2] hexagonal plate has two adjacent hydrophobic faces and four hydrophilic faces. A [1,3,5] hexagonal plate has alternating hydrophobic and hydrophilic faces.
15. The experimental setup of the system was the same as that of the experiments involving the solid hexagonal plates.
16. Mao, C.; Thalladi, V. R.; Wolfe, D. B.; Whitesides, S.; Whitesides, G. M. J. Am. Chem. Soc. 2002, 124, 14508-14509.
17. The fabrication of the open hexagonal plates with internal faces functionalized Hydrophobic and external faces functionalized hydrophilic is described in the Supporting Information.
18. The [1,3] square plates were fabricated the same way as the hexagonal plates except a square brass rod was used to make the original molds. See refs 1, 2, and 10 for a description of details.
19. Some slight mismatches were observed after the agitation was stopped. These mismatches resulted from the fact that the magnitudes of the centripetal force and the inertia of the plate were much larger than those of the repulsive forces from the mismatched menisci. Slight agitation of the system easily broke up these mismatches but did not disturb the bonds formed through matched menisci.