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. Author manuscript; available in PMC: 2015 Nov 5.
Published in final edited form as: Adv Funct Mater. 2014 Aug 14;24(41):6509–6515. doi: 10.1002/adfm.201401302

Figure 2.

Figure 2

(a) Side view of a DEX phase drop in the immersion PEG phase formed on a glass surface using equilibrated phases from an ATPS with initial concentrations of 6.4% DEX and 5% PEG. (b) A top-view of A431.H9 skin cancer cell spheroid formed with a cell density of 1×104 cells at 24 hrs. (c) Scanning electron microscope (SEM) image of A431.H9 cells after one week of incubation. (d) Spheroids generated using a wide range of density of cells, i.e. 1×103 1×105 cells/spheroid, to demonstrate the feasibility of forming different size tumor models.