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. Author manuscript; available in PMC: 2014 Nov 26.
Published in final edited form as: ACS Nano. 2013 Oct 11;7(11):10.1021/nn4026228. doi: 10.1021/nn4026228

Figure 1.

Figure 1

Synthesis and characterization of DTPA-chitosan-g-C18. (a) Synthesis of DTPA-chitosan-g-C18 formed by the sequential reaction of stearic acid and DTPA with glucosamine units of chitosan. (b) Color of xylenol orange in media without any GdCl3 (first bottle), media with free GdCl3 (second bottle), and a mixture of GdCl3 chelated by DTPA-chitosan (third bottle). (c) The UV absorbance spectra of xylenol orange in media without GdCl3 (I), media with free GdCl3 (II), and the mixture of GdCl3 chelated by DTPA-chitosan-g-C18 (III).