Tipenhanced raman spectroscopy ters is a powerful surface analysis technique that can provide subnanometerresolved images of nanostructures with. Tipenhanced raman spectroscopy ters, which combines the merits of. Tipenhanced raman spectroscopy ters is a powerful tool to investigate. Optical antennas for tunable enhancement in tip enhansed raman spectroscopy imaging article pdf available in applied physics express 83.
Tipenhanced raman spectroscopy ters has shown promise as a tool for in situ nanoscale chemical analysis, and is also leading to a better understanding of the fundamentals of surfaceenhanced. Tipenhanced raman spectroscopy or ters is a technique uniting the spatial resolution of atomic force microscopy afm with the chemical. Markus raschke department of physics, department of chemistry, and jila, university of colorado at boulder background the ability to identify small quantities of adsorbed analyte or structural features down to the fewmolecule level is a key challenge in nanotechnology. Nanoscale probing of adsorbed species by tipenhanced. Tipenhanced raman spectroscopy ters, a combination of raman spectroscopy and apertureless nearfield scanning optical microscopy using a metallic tip which resonates with local mode of surface.
Tipenhanced raman spectroscopy tipenhanced raman spectroscopy ters, a combination of raman spectroscopy and apertureless nearfield scanning optical microscopy using a metallic tip which resonates with the local mode of the surface plasmon, can provide a highsensitive and highspatialresolution optical analytical approach. Tipenhanced raman spectroscopy ters is a combination of surface enhanced. After over 15 years of development, tipenhanced raman spectroscopy ters is now facing a very important stage in its history. Consequently, very short acquisition times can be achieved for a good. Two phasesensitive opas of equal gain and opposite pump phases. Subnanometerresolved chemical imaging via multivariate analysis. Effect of scattering efficiency in the tipenhanced raman. Sers has since been exploited for bioanalysis because of its high sensitivity and multiplexing. Weckhuysen, faculty of science, debye institute for nanomaterials science, utrecht university, universiteitsweg 99, 3584 cg utrecht, the netherlands national physical laboratory, hampton road, teddington, middlesex tw11 0lw, u. It also remains a great challenge to establish tip.
However, to date nanoscale resolution chemical imaging in a liquid environment has not been possible, in part due to the lack of robust ters probes that are stable when immersed in a liquid. Ters offers high detection sensitivity down to single molecules and a high spatial resolution down to subnanometers, which make it an unprecedented nanoscale analytical technique offering molecular fingerprint information. Nanoscale chemical imaging of solidliquid interfaces. A high signal to noise ratio snr with a reasonably short acquisition. Surfaceenhanced raman scattering sers is a physical phenomenon first discovered in 1974. It is worth mentioning that the socalled hyphenated instruments, that combine raman with. Tipenhanced raman scattering imaging of twodimensional. A manual and an automatic ters based virus discrimination. Excitationtunable tipenhanced raman spectroscopy the. Tipenhanced raman spectroscopy analytical chemistry. Surface and tipenhanced raman spectroscopy in catalysis thomas hartman, caterina s.
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