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. Author manuscript; available in PMC: 2014 Jun 19.
Published in final edited form as: Bioconjug Chem. 2013 May 14;24(6):878–888. doi: 10.1021/bc3004815

Figure 4.

Figure 4

a) Transmittance electron microscopy images of as prepared CTAB coated gold nanorods (left) and the nanorods after modification with mPEG-thiol molecules (right). b) Extinction spectra of as prepared gold nanorods (blue) and the nanorods after modification with either 2 kDa mPEG-thiol (red); clone c225 (purple) and RG16 (green) antibodies. c) Comparison of extinction spectra of as prepared gold nanorods (blue) and nanorods after ligand exchange using small molecular weight, 300 Da MW, mPEG-thiol molecules (orange). Aggregation of nanorods is evident from profound spectral changes (orange spectrum).