Figure 5
From: Experimental stability analysis of different water-based nanofluids
Nanoparticles mean diameter. Diameter in relation to the time elapsed from the day of preparation, for water containing (a) 0.01 wt.% TiO2 + 0.02 wt.% PEG: (filled square) static, (open square) shaken; (b) 0.1 wt.% TiO2 + 0.2 wt.% PEG: (filled triangle) static, (empty triangle) shaken; (c) 1 wt.% TiO2 + 2 wt.% PEG: (filled circle) static, (open circle) shaken.