A process to fabricate structures on inclined substrates has the potential yield novel applications for colloidal-based structures. However, conventional techniques, besides coffee ring effect (CRE), anisotropic particle deposition along inclination direction (IE) is expected occur. We hypothesize that both effects can be inhibited by reducing dispense volume during printing direct writing. com...

We present the synthesis of new shapes of colloidal silica particles by manipulating their chemical composition and subsequent etching. Segments of silica rods, prepared by the ammonia catalyzed hydrolysis and condensation of tetraethylorthosilicate (TEOS) from polyvinylpyrrolidone loaded water droplets, were grown under different conditions. Upon decreasing temperature, delaying ethanol additi...