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research article

Nanodispenser for attoliter volume deposition using atomic force microscopy probes modified by focused-ion-beam milling

Meister, A
•
Liley, M
•
Brugger, J  
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2004
Applied Physics Letters

In this letter, we describe the on-demand dispensing of single liquid droplets with volumes down to a few attoliters and submicrometric spacing. This dispensing is achieved using a standard atomic force microscope probe, with a 200 nm aperture at the tip apex, opened by focused ion beam milling. The inside of the tip is used as reservoir for the liquid. This maskless dispensing, realized in ambient environment, permits the direct creation of droplet arrays. Nanoparticles, suspended in the liquid, were organized on a surface.

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