Tip Enhanced Raman Scattering (TERS) or nano-Raman

TERS brings Raman spectroscopy into nanoscale resolution imaging. TERS is therefore a super-resolution chemical imaging technique. Better yet, it is a label-free super-resolution imaging technique.

TERS imaging is performed with an AFM-Raman spectrometer, a Scanning Probe Microscope (SPM) integrated with an optical micro-spectrometer. The scanning probe microscope provides the means for nanoscale imaging, the optical microscope provides the means to bring the light to a functionalized probe, and the spectrometer is the sensor analyzing the light output providing chemical specificity.

The key in TERS is a properly enhancing probe. HORIBA Scientific has developped TERS probes in collaboration with different partners.

tip-enhanced Raman (TERS) or nano-Raman - HORIBA

The functionalized probe acts as a 'plasmonic antenna' which enhances the local electromagnetic field, enhancing the Raman scattering at the very end of the probe. With enough enhancement, the local near-field Raman signal largely overwhelms the far-field signal and Raman signal with nanoscale resolution can be observed.

Why is TERS quickly becoming the next big thing in nano-spectroscopy?

Because other near field optical techniques like NSOM have always lacked the sensitivity to perform proper Raman detection, while the local enhancement obtained from TERS probes truly makes it a reality.

Today HORIBA brings TERS to another level: through several collaboration with academia and continuous internal development efforts, HORIBA is now not only able to guaranty TERS probe efficiency, but guaranties TERS imaging and resolution.

While probes are now commercially available, high throuhgput and long term stability are critical to perform TERS imaging reliably: Faster is better when trying to circumvent the many possible uncontrolled sources of drift that would affect resolution.

This is where HORIBA's integrated solutions excel. Check out the power of AFM-Raman and TERS

To learn more about this technology and how you can integrate all your needs into one powerful instrument, please fill out the contact form or call or email your local HORIBA Scientific representative.