EPR / Electron Paramagnetic Resonance
Electron Paramagnetic Resonance (EPR) Spectroscopy is a Magnetic Resonance technique which is based on the absorption of microwaves from electron spins. EPR spectroscopy is of utmost importance in order to elucidate the structure and function of systems featuring uncoupled electrons such as molecular inorganic materials, carbon based materials, paramagnetic centers in bio-materials, and semiconductors. In these systems EPR spectroscopy gives invaluable information concerning the electronic structure and determines critical magnetic parameters such as g-factors, hyperfine interactions, exchange coupling and magnetic anisotropy.
EPR spectroscopy is a valuable technique to study the static and dynamic properties of magnetic nanoparticles with a variety of applications such as magnetic storage, magnetic resonance contrast agents and pharmaceuticals.
Pulsed EPR spectroscopy, where the microwave irradiation is applied in the form of short pulses, comprises many advanced methods for the measurement of dynamic effects and the determination of weak hyperfine interactions between the unpaired electron and distant magnetic nuclei. These methods are typically applied for the measurement of the electron spin coherence time of molecular magnets or encaged paramagnetic atoms, and their evaluation as quantum bits (qubits) in the field of spin-based quantum computing. Moreover, they provide information on the local environment of the paramagnetic center and thus are well suited for structural studies in systems lacking long-range order on length scales that are not easily accessible by other techniques.
Systems featuring uncoupled electrons such as molecular inorganic materials, carbon based materials, paramagnetic centers in bio-materials, and semiconductors and magnetic nanoparticles
Upgraded cw Χ-band (9.5 GHz) EPR spectrometer (Bruker ER-200D). Cavities for perpendicular and parallel mode experiments. Temperature range: 2.0 – 300K.
cw-Q-band (34 GHz) EPR spectrometer (comprised of several off-the-shelf units from a range of different manufacturers). Temperature range: 2.0 – 300K
Dr Yiannis Sanakis (email@example.com)
Pulsed EPR spectrometer
Static (superhyperfine couplings) and dynamic (electron spin relaxation times) parameters of paramagnetic systems including molecular spins (encaged atoms)for quantum information processing applications, transition metal complexes and irradiation-induced defects in solids
X-band (9.7 GHz) Pulsed EPR instrument (Bruker ESP380E) equipped with a DICE unit and an ENI amplifier (rf frequencies up to 35 MHz) for pulsed Electron Nuclear Double Resonance (ENDOR) experiments and cryostats for measurements in the range 4.0-300 K
Dr George Mitrikas (firstname.lastname@example.org)