Protocol for three-dimensional shaping strategy via solidifying polygonal nanofluid drops

Mesoscale to nanoscale three-dimensional (3D) fabrication mostly requires complicated industry processing techniques. Here, we present a protocol for 3D shaping control by solidifying a water-based TiO₂ nanofluid drop on a polygonal wettability-patterned surface. We detail the steps for preparing stable TiO₂ nanofluid and wettability-patterned surfaces. We then describe the experimental procedure to obtain various and precise 3D morphologies by adjusting the deposited TiO₂ nanofluid drop volume. This protocol provides a promising technique for future 3D manufacturing. For complete details on the use and execution of this protocol, please refer to Jiang et al.¹.