Spectroscopy Service
The ultra-fast spectroscopy laboratory allows performing time-resolved absorption and emission measurements with a time resolution of 190 femtoseconds (fs) over a broad temporal range (190 fs - 1 millisecond). Measurements can be carried out in the 350-850nm spectral range.
Instrumental disponible
- Sistema de excitación láser ultra-rápido formado por un láser pulsado PHAROS (Light Conversion) (longitud de onda de emisión 1030nm, tasa de repetición 1kHz y duración de pulso 190fs) y un amplificador paramétrico (OPA) ORPHEUS (Light Conversion) que produce pulsos de duración y tasa de repetición iguales al PHAROS pero con una longitud de onda sintonizable en el rango 350-2500nm.
- Espectrómetros de absorción para el rango temporal 190fs-8ns (HELIOS, Ultrafast Systems) y 2ns-1ms (EOS, Ultrafast Systems). Ambos sistemas permiten realizar medidas en el rango espectral 350-1100nm con una resolución de 2nm.
- Espectrómetro de emisión para el rango temporal 190fs-5ns (HALCYONE, Ultrafast Systems) oeprativo en el rango espectral 350-1100nm.
- Sistema de time-correlated single-photon counting (TCSPC) para realizar medidas de emisión resuelta en el tiempo en el rango temporal 1ns-1ms y en el rango espectral 200-850nm.
Contact
h.miguez@csic.es, juan.galisteo@csic.es
954 48 95 87
Raman spectroscopy is based on a photonic process in which the incident radiation is dis-persed by the sample. This latter is perturbed leading to vibrational and rotational transitions. In general, the Raman spectrum is interpreted like a vibrational one, providing information very similar to the infrared spectroscopy, although the Raman active vibrations are not always the same as those excited with infrared radiation. A Raman vibration mode is active if there is a change of polarizability of the chemical bonds or the considered molecule, which in turn results in the generation of induced dipolar momentam. Its application fields are very broad: semiconductors, carbon compounds (graphite, diamond, nanotubes, fibers…), catalysts, pigments, etc.
Available Equipment
- LabRAM Horiba Jobin Yvon equipped with a confocal microscope and 3 excitation lasers (785 nm red, 532 nm green, and 325 nm UV)
Contact
jcslopez@icmse.csic.es , h.miguez@csic.es, centeno@icmse.csic.es
954 48 95 43 - 954 48 95 81 - 954 48 95 79
Infrared spectroscopy (FT-IR) is based on the selective absorption of the infrared radiation by the materials. This absorption means a change in the vibrational energy of the chemical bonds, whenever it occurs a change in the polarization. The result is a spectrum showing the absorbed or transmitted radiation as a function of the wavenumber of the radiation, which can be assigned to the corresponding chemical bound.
The equipment at the ICMS works in a wavenumber range from 5000 to 250 cm-1 (CsI optic), and can operate with a gas purge or in vacuum. It is equipped with several accessories to do Diffuse Reflectance (DRIFT), Attenuated Total Reflectance (ATR) or Specular Reflectance. It has got an Infrared Microscope with a lateral resolution of 10 µm.
Available Equipment
- JASCO FT/IR-6200 IRT-5000
Contact
jcslopez@icmse.csic.es , h.miguez@csic.es, centeno@icmse.csic.es
954 48 95 39
he Ultraviolet-Visible Spectroscopy (UV-Vis) reports on the existing energy differences be-tween the more external occupied electronic levels and the nearer unoccupied ones.
There are two equipments in the laboratory, which work in the wavelength range of 190 nm to 900 nm. It can operate in the Transmission mode or in Diffuse Reflectance Modes.
Available Equipment
- Cary 5000+UMA (Universal Measurement Accessory)
- Cary 300
- SHIMADZU UV-2101 PC
Contact
jcslopez@icmse.csic.es , h.miguez@csic.es, centeno@icmse.csic.es
954 48 95 39
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