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. Author manuscript; available in PMC: 2012 Aug 3.
Published in final edited form as: Nanoscale. 2011 Jul 13;3(8):3395–3407. doi: 10.1039/c1nr10427f

Fig. 9.

Fig. 9

Energy-dispersive X-ray spectra for nanoporous gold with activated NHS-ester in the presence and absence of BSA. The previously unseen nitrogen peak (from NPG with NHS-ester SAM only, red and green lines) is seen clearly both on the exterior (blue line) and interior (black line) of the NPG. The K emission lines for C (0.28 keV), N (0.39 keV) and Au (1.65 and 2.12 keV) are clearly visible, as well as the K emission line for various metal indicated in spectra in the range from 0.6 to 1.5 KeV.