Abstract
Gentle motions of reactive fluids flowing through capillaries form the basis of a new microfahrication procedure that offers great simplicity compared with other methods. The new method, which may be applied to materials that aren't amenable to other fabrication techniques, has been used with high precision to build micrometer-sized electrode systems and other devices [ Science , 285 , 83 (1999)]. The procedure was developed by Harvard University chemistry professor George M. Whitesides and postdoctoral associates Paul J. A. Kenis and Rustem F. Ismagilov. By selecting conditions that promote a mild and nonturbulent type of mass transport known as laminar flow, the Harvard researchers carry out chemical reactions strictly at the interface between streams of solutions flowing side-by-side through minuscule channels or at the interface of tiny reagent streams and capillary walls. These reactions leave in their wake lines of metal atoms or other products that can serve as microelectronic devices. It's a real...
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