Figure 2.

Images of ethylene glycol-based MWCNT nanofluids, after sitting still for 1 week in the laboratory. From left to right: sample 1, pure ethylene glycol; sample 2, ethylene glycol with 0.25 wt% gum arabic; sample 3, ethylene glycol with 0.25 wt% gum arabic and 0.5 wt% MWCNT, no sonication; sample 4, ethylene glycol with 0.25 wt% gum arabic and 0.5 wt% MWCNT, sonicated continuously for 120 min.

Ruan and Jacobi Nanoscale Research Letters 2012 7:127   doi:10.1186/1556-276X-7-127
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