teraction between menisci, drops of hydrophobic liquid, or pads of molten metal; more recent work has used electrostatic or magnetic interactions. Perfecting Self-Assembly Figure I • WO Nall •WIONtitlIC 3 Arum= on &VW a • it- u • st Wirt wend runt It AtA twat SPE MOM X 0 -a s s ii Figure 2 Figure 3 h