Infrared spectroelectrochemistry is of great value for monitoring the composition during an electrochemical reaction. To observe the transient response to an electrical potential change, sub-millisecond time resolution is commonly required. For infrared measurements, this was so far only possible with single wavelength sources or step-scan FTIR spectroscopy.
Dual-comb spectroscopy opens completely new possibilities for infrared spectroelectrochemistry. Thanks to the simultaneous multi-wavelength detection, DCS enables studies of the time evolution of multiple molecular absorption features with microsecond time resolution. Thereby, measurement times are reduced by orders of magnitude as compared to a step-scan FTIR experiment. This allows to do parameter sweeps where previously a single experiment used up a full day.
Recently, the potential dependent desorption of a monolayer of a pyridine derivative with time resolution as high as 4 μs was achieved (Lins et al. 2020). The limit of detection was studied and found to be as low as 0.7% of a monolayer. While this result was achieved in only 32 minutes of measurement time, a comparable signal quality took more than 2 days of continuous measurements with an FTIR.
What our customers say about IRis-F1
QCL frequency combs has led to a paradigm change in TRVS IR spectroscopy. Now microsecond reaction monitoring becomes possible in the MID-IR.
Dr. Ian J. Burgess, University of Saskatchewan, Canada
Professor in the Chemistry Department
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IRis-C
The IRis-C is the next generation instrument in IRsweep’s quantum cascade laser frequency comb spectrometer line. It uses the same dual-comb spectroscopy technology as IRsweep’s IRis-F1, offering microsecond time-resolution, high spectral resolution, and high optical brightness in the mid-infrared. With a substantial reduction in physical dimensions and price, it is easily adaptable to any type of application and fits even tighter budgets.
IRis-F1
The IRis-F1 spectrometer offers you an unmatched combination of speed, brightness and multi-color measurements. The quantum cascade laser frequency comb spectrometer is the first turn-key frequency comb spectroscopy system. As opposed to single-frequency operation, which necessitates tuning over your spectral range of interest, you will achieve a broad spectral coverage in a single-shot measurement.
IRis-core
The IRis-core is an ideal basis for the setup of such a system in the mid-IR range: It offers two overlapping free-running QCL-based frequency comb lasers in a single system. The system outputs already co-aligned beams and comes with a set of drive instructions with factory-characterized heterodyning conditions. The system comes complete with drive electronics and a control computer with a graphical user interface.