VUV/UV/Vis/NIR spectroscopy is the measurement of the attenuation of a beam of light after it passes through a sample or after reflection from a sample surface. It can be used either in gas, solution or solid state for the quantitative determination of different analyses and optical absorption characteristics. Absorption measurements can be at a single wavelength or over an extended spectral range. This spectroscopy is usually applied to molecules or inorganic complexes in solution, but can also be applied to gases and cryogenically prepared ice materials. Solution spectra generally have broad features that are of limited use for sample identification, but are very useful for quantitative measurements.
The UV-Vis range spans the range of human visual acuity of approximately 400 - 750 nm, and so this spectroscopy is useful to characterize the absorption, transmission, and reflectivity of a variety of technologically important materials, such as films, pigments, coatings, windows, and filters. The VUV-UV range (~115-400 nm) is used to investigate the higher energy electronic structure of gas and solid phase species.
The infrastructure provides VUV/UV/Vis/NIR spectrophotometry, with some methods combining an integrating sphere, which can be used for high precision diffused reflectance and scattered transmittance measurements on virtually any solid or liquid.
Perkin Elmer lambda 19 spectrometer @ Laboratory for Micro- and Nanotechnology
Optical spectroscopy
200-3200 nm
Reflection and transmission mode
0.05 to 5 nm (UV/VIS)
0.2 to 20 nm (NIR)
Typically 15x15 mm2 samples up to 50x50 mm2 and standard optical cuvettes for liquids/gases
Gas/liquid
CNR-ISM
Italy
Optical Spectrometer
Steady state optical spectroscopy is the basic tool for the characterization of materials and the first step to pump-probe experiments.
The optical spectrometer allows measurements of transmittance and reflectance in the wavelength range of 220-850 nm. The instrument is equipped with an integrating sphere.
Solid and liquid samples measured in air.
Atmospheric pressure.
EURONANOLAB
France
OS at EURONANOLAB - MMI
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TUG
Italy
UV spectroscopy
UV-VIS spectroscopy of liquids, solids, thin films.
Standard cuvette holder for liquids (100µl), solid sample holder, fiber optic probes, Specular Reflectance module. Interchangeable masks for examining small samples or small areas of large samples are provided.
Stop-flow (Bio-Logic, DE)
EURONANOLAB
France
OS at EURONANOLAB - IMM
AU-ISA
Denmark
OS - AU-UV beamline @ASTRID2
VUV-UV-Vis spectroscopy of gases, room temperature thin films and cryogenically prepared ices.
Wavelength 115 - 650 nm (10.8 – 1.9 eV)
VUV-UV spectroscopy carried out in transmittance mode.
Room temperature films should be prepared on VUV-UV-Vis transmitting windows (MgF2 optimised for the VUV) with a diameter of 22 or 25 mm, and thickness 1-2 mm.
Measurements are carried out under vacuum
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The AU-UV beam line which is a toroidal grating monochromator, using two gratings to cover the full energy range. Light source is the 3rd generation synchrotron light source ASTRID2. Photon flux 1010 – 1011 photons/cm2/100 mA, with a resolving power in the range ~1500-4000.
A purpose built high-vacuum chamber allows the in-situ preparation of ices onto a window (substrate) at temperatures down to 8K. Dedicated dosing lines are used to prepare pure and mixture samples from gases, liquids, and solids that are then dosed into the HV chamber and analysed using transmission VUV-UV-Vis spectroscopy. Ices can then be processed with high energy electrons and re-analysed using VUV-UV-Vis spectroscopy. Separately, a vacuum chamber which holds four windows, can be mounted on the beam line for the measurement of pre-prepared films which are stable at room temperature. Finally, a custom-made gas cell is available for gas phase VUV-UV-Vis spectroscopy.
In SEM a beam is scanned over a sample surface while a signal from secondary or back-scattered electrons is recorded. SEM is used to image an area of the sample with nanometric resolution, and also to measure its composition, crystallographic phase distribution and local texture.
Laser patterning is a technique for the controlled patterning of materials at micro- and nano-scales. It offers the ability to directly write patterns on the surface and complex 3D channels into the bulk of solid materials, also biomaterials. Applications can range from microfluidic systems and sensors to tissue engineering scaffolds.
IR spectroscopy is based on the absorption of infrared radiation by matter. This leads to energetic transitions in the vibrational state of concrete chemical bonds. Since the frequencies that are absorbed by the molecules are characteristic of their structure, this technique is a powerful tool for qualitative and quantitative molecular analysis.
We offer a multiple ion-cluster source operating in ultra-high vacuum devoted to the fabrication and characterization of highly controlled nanoparticles. They are produced in gas phase with high purity and controlled size, structure and stoichiometry and they can be collected in the desired coverage on arbitrary surfaces for different uses.
This techniques offers a multi-scale theoretical framework that allows for the estimation of structural and phase changes when materials are exposed to extreme irradiation conditions generated by various types of electromagnetic sources (e.g. synchrotron sources, pulsed and free-electron lasers).
