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. Author manuscript; available in PMC: 2015 Oct 24.
Published in final edited form as: Nanoscale. 2015 Jun 7;7(21):9462–9466. doi: 10.1039/c5nr01518a

Fig. 1.

Fig. 1

TEM images of self-assembled probes 1 (A), 2 (B), [Gd(III)]-1 (C) and [Gd(III)]-2 (D) at 500 μM in PBS at pH 7.4. TEM samples stained using a 2 wt% uranyl acetate aqueous solution to enhance the imaging contrast. Scale bars are 50 nm.