Nuclear Magnetic Resonance – NMR Lab
Electro optical characterization
X-Ray Diffractometry and Polarized Optical Microscopy
Nuclear Magnetic Resonance – NMR Lab
Responsible:
NMR Relaxometry, Pedro Sebastião ext: 3210
NMR Spectroscopy, João L. M. Figueirinhas ext: 3359
Description:
The NMR Lab is specially prepared for studies of spectroscopy and relaxometry of complex fluids. Liquid crystals, ionic liquids, polymers, dendrimers, and other complex systems are examples of systems usually studied in this laboratory.
The laboratory is integrated in the Portuguese Nuclear Magnetic Resonance Network.
Equipment:
- Conventional solid-state NMR spectrometer, Bruker Avance II 300, Avance II Console (6 MHz – 365MHz)
- KEA2, 5-100 MHz Magritek NMR console
- Bruker Widebore, Ultra-shielded 7.1 Tesla Superconducting Magnet
- Bruker BE-30, 0-2.4 Tesla Electromagnet (used with Bruker Avance II Console)
- Fast Field Cycling NMR spectrometer for proton relaxation measurements in the Larmor frequency range of 5kHz – 9 MHz.
Location: IST-Alameda, Complexo Interdisciplinar, floor -2
Access conditions: Within collaborative research work. Contact the scientific researcher in charge.
Conventional 300MHz solid state NMR spectrometer
Variable fiel 0.2 T – 2.5 T solid state NMR spectometer magnet
Fast Field Cycling NMR spectrometer for proton relaxation measurements in a very wide magnetic field range (10-4 T – 0.2 T)
Electro-optical characterization – Development and measurement of physical properties of novel liquid crystal cells for LC displays (LCD technology).
Electro-optical characterization
Responsible and contacts: João Figueirinhas, ext: 3359
Description:
Electro-optical cells containing LC in different conditions of confinement in a variety of matrices (e.g. PDLC systems of different types, cellulosic films, …) are studied in this lab. Besides the investigation of fundamental physical properties of these systems (e.g. refractive indices and visco-elastic parameters) most of the undertaken research have in mind the development and optimization of devices with potential technological applications: LC displays, electrically driven shutters, light valves.
The electro-optical setup is composed of an optical bench equipped with a He-Ne laser and computer controlled systems associated with a function generator, voltage amplifier, digital scope, light detectors and temperature variation of sample cells.
Location: IST-Alameda, Complexo Interdisciplinar, floor -2
Access conditions: Within collaborative research work. Contact the scientific researcher in charge.
X-Ray Diffractometry and Polarized Optical Microscopy
Responsible: Carlos Cruz
Contact persons: Carlos Cruz, ext: 3209
João Figueirinhas, ext: 3359
Description:
This laboratory includes basic facilities for sample preparation, polarising optical microscopy observations and X-Ray diffractometry of powder samples. The X-ray diffractometer is equipped with an INEL gas curved counter and a temperature control system particularly useful for the study of phase transitions and structural characterization of liquid crystals.
Location: IST-Alameda, Complexo Interdisciplinar, floor -2.
Access conditions: Within collaborative research work. Contact the scientific researcher in charge.
X-ray diffractometer
Polarising Optical Microscope – Identification of Liquid Crystal Phases