A tip-enhanced Raman instrument was set up based on a homemade optical fiber Raman head, a dispersive spectrograph, and a scanning tunneling microscope (STM) system. Electrochemical preparation of tip-enhanced Raman spectroscopy (TERS) Au tips was refined by using the etching current as ending point control, resulting in a success rate as high as 90%. The high quality Au tips allow the recording of STM images with molecular resolution and TERS spectra of nonresonant surface species on a single-crystal surface.

Topics
Surface plasmon resonance, Electronic filters, Atomic force microscopy, Raman spectroscopy, Scanning electron microscopy, Scanning tunneling microscopy, Potentiometry, Spectral methods, Optical devices, Optical fibers
© 2007 American Institute of Physics.
2007
American Institute of Physics
You do not currently have access to this content.