Patterning of Nano-Hydroxyapatite onto SiO2 and Electro-spun Mat Surfaces Using Dip-Pen Nanolithography

• Report formulation of nanohydroxyapatite (nanoHA) based ink for dip pen lithography (DPN). • 30-50 % (wt/Vol) Glycerol in isopropyl alcohol is necessary to achieve the required viscosity of 5-15 cP for printing of nanoHA (3 w/v %)-formulated ink. • Ultra sonication of glycerol formulated nanoHA ink aided to disperse well the nanoparticles to get ~200 nm in size and helped in controlled printing • The optimal ink consisted of 30% glycerol and 3...