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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Adv Mater. 2010 Dec 1;22(45):5168–5172. doi: 10.1002/adma.201002219

Figure 1.

Figure 1

Colloidal stability and dynamic light scattering measurements of surface-modified particles in aqueous solution (0.5 mg metal/mL). (a) TMAOH-coated NCs were highly stable in water, but immediately precipitated in PBS (b). (c) The absence of carboxyl groups on pure polyvinyl alcohol failed to stabilize the NCs in buffer solution. NCs were rendered water-soluble and stable in PBS after coating them with CMPVA containing (d) 150 μmol carboxylate per gram of polymer, (e) 380 μmol carboxylate per gram of polymer, and (f) 510 μmol carboxylate per gram of polymer.