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. Author manuscript; available in PMC: 2008 Oct 27.
Published in final edited form as: Langmuir. 2008 Feb 5;24(6):2908–2915. doi: 10.1021/la703053h

Figure 2.

Figure 2

White-light reflection spectrum illustrating optical red shifts relative to the baseline (black) following each sequence of synthetic coupling and Fmoc-deprotection steps: APTMS (red), Rink linker (blue), and Arg-(Pfb) (green). The PSi sensor/scaffold was washed and dried prior to recording optical measurements. Optical shifts result from changes in local RI caused by surface modifications that decrease porosity. The scaffold/sensor is dried before measurements to eliminate bulk RI change due to solvent in the PSi matrix.