Electrostatic Forces and Molecular Transport in a Nanofountain Probe

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With the advent of a variety of novel nanometer-scale diagnostic techniques such as DNA micro- and nanoarrays, increasing focus has been placed on developing methods to quickly and accurately create these nanometer scale patterns. One promising technique for depositing DNA, proteins, and other liquid molecular "inks" with submicron resolution is the nanofountain probe (NFP). The NFP is a specially designed atomic force microscope cantilever that works like a microflu idic pen, transporting inks from a remote reservoir to the substrate. During patterning, a liquid ink meniscus forms between the probe's tip and the substrate. The shape of the meniscus, and thus the working resolution of the NFP, is dependent upon the properties of both the substrate and the ink. Ink transport can be aided by the forces created by an electrophoretic voltage. AN SYS finite element

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  • 08/07/2018
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