We present a method for performing nanoscale wet chemistry on single carbon nanotubes as well as spectroscopic characterization of the functionalized molecules using a coupled atomic force microscope (AFM) and optical microscope. An AFM probe was functionalized with a single multiwalled carbon nanotube and then locally oxidized by dipping it into nitric acid (HNO3) in situ using AFM manipulation. Raman scattering was collected from the carbon nanotube functionalized probe before and after the oxidation reaction. An increase in the Raman D band was observed after the acid treatment, demonstrating that oxidation had occurred. This is the first step towards developing a real-time technique for dynamic studies of chemical reactions on single nanoparticles/molecules.
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