Tip-Enhanced Raman Spectroscopy (TERS) is a powerful technique that combines Scanning Probe Microscopy (SPM) with Raman Spectroscopy. It utilizes the localized surface plasmon resonance (LSPR) of Au or Ag tip under the excitation of light to enhance the Raman process of species in close vicinity to the tip. It provides abundant chemical signatures at high detection sensitivity up to single molecules and high spatial resolution up to several nm. It has found important application in different field.
Further wider application of TERS relies on highly sensitive TERS instruments, tips with highly enhanced TERS activity and SPM imaging properties and some killing applications in different fields. Our current interests are focused on the following aspects:
- Developing highly sensitive and easy-to-use TERS instruments, that can be coupled to in situ and real time study of electrochemical systems.
- Fabricating reproducible and high-enhanced silver or gold tip (for both STM and AFM).
- Revealing the enhancement mechanism in TERS configuration and try to obtain a clear correlation of plasmonic behavior of tip with the TERS signal of the studied system.
- Applying TERS for studying electrochemical processes, electronic properties of unique catalysts, high resolution spectroscopic imaging of novel materials.
- Developing novel technique related to plasmonic effects.