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Analytical Spectroscopic Tools

As well as the ultrafast beamlines available for use, WCUS also has a number of frequency resolved spectroscopic tools in its repertoire. These can be used for characterisation of samples previous to running ultrafast experiments. They are separate utilities, that do not require use of the ultrafast laser apparatus. You can book time on any of this apparatus using the booking button on the right of the page.


IR Spectroscopy

WCUS possess a Bruker Vertex 70V IR spectrometer for CW frequency resolved measurement of the IR spectra of samples. The spectrometer delivers a range from 6000 cm-1 to 50 cm-1 (~1.7 - 200 microns). It has a resolution of 0.4 cm-1 and can be used with solid, liquid, or gaseous samples under atmospheric or evacuated conditions. It has a reflection and transmission accessory, and a helium cryostat option for sample temperatures from 4K to 400K.

UV/VIS Spectroscopy

The LAMBDA 850 UV/Vis spectrophotometer produces frequency resolved UV/Vis spectra over a wavlength range from 175 to 900 nm (wavelengths shorter than 195 nm require evacuation/purge) with a 0.05 nm resolution. The spectrometer accepts standard 1 cm x 1 cm cuvettes for liquid or solution samples. It can also accept solid samples as standard. The large samle regoin of the spectrometer, however, allows for a great deal of flexibility it the samples that can be analysed, and gaseous, cooled, or pressurised samples may be accommodated. Please contact a member of the team to discuss your requirements.

Fluorolog

The Horiba Fluorolog at WCUS allows fluorescence measurements to be performed, including taking emission spectra using a CW arc lamp lightsource, with excitation wavelengths ranging from ~250 nm to ~2000 nm, or measuring fluorescence lifetimes using a ns pulsed laser diode source at 402 nm, 533 nm or 650 nm. Multiple, interchangable PMTs allow detection from the ultraviolet (between 250 to 850 nm) to the infrared (from 950 to ~2500 nm). The infrared detectors require liquid nitrogen cooling, and can be measured directly, or via a lock-in amplifier when measuring very small signals. The Fluorlog has numersous filters (410 nm longpass, 500 nm longpass, 850 nm longpass) to remove scattered light from the excitation source.

Follow this link to book time on this experiment.

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