Jet delivery system for Raman scattering on bio-inorganic compounds

We present a micro-jet sample delivery system for Ramanmeasurements. Compared to cuvettemeasurements, the observed Raman signal is enhanced by more than one order of magnitude and does not contain signal distortions from the liquid-glass interface. Furthermore, the signal stability of repeatedmeasurements is enhanced due to reduced sample damage effects by constantly replenishing the sample. This allows the study of sensitive samples that can only be produced in low concentrations. Our setup consists of a controlled sample environment that can be either under vacuum or an exchange gas, which allows the study of samples that are unstable in air. Finally, by matching the effective source point of the Raman instrument with the diameter of thejet, controlled experiments using laser beams of different wavelengths are possible. We see future applications of our setup for resonance Raman and time-resolved Ramanmeasurements of bioinorganic samples.
Source: Applied Physics Letters - Category: Physics Authors: Source Type: research