Skip navigation

Micro-wilhelmy with Nanowires (past project)

Micro-wilhelmy with Nanowires (past project)

At the University of Louisville (ERINC, Cohn group), we have carried out viscosity sub-surface force measurements of polymeric solutions by means of nanowire-tipped AFM cantilevers. We demonstrated that long metal nanoneedles grown on AFM probes could give very clear measurements of the surface tension, evaporation rate and viscosity of liquid crystals and polymeric solutions. To perform this measurement, we controllably grew Ag2Ga nanowires on AFM cantilevers by real-time observation of the formation process under STM microscope. Later, the startup company Nauganeedles was founded to develop and commercialized this nanowire production technique.