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. Author manuscript; available in PMC: 2010 Nov 11.
Published in final edited form as: Angew Chem Int Ed Engl. 2009;48(12):2180–2184. doi: 10.1002/anie.200806139

Figure 2.

Figure 2

Schematic of the approach employed for the exchange between 4-MBT (probe-A) and 1,4-BDT (probe-B) on a single Ag nanocube. The Ag nanocube is functionalized with probe-A and then exposed to plasma etching to remove the absorbed probe-A molecules from the surface of the nanocube. In the next step, the nanocube is immersed in a solution of probe-B molecules. As 4-MBT and 1,4-BDT present different Raman signatures, the exchange process can be readily monitored by observing the shift in the 8a band (1550–1600 cm−1) for the benzene ring.