NATIONAL INSTITUTE for LASER, PLASMA and RADIATION PHYSICS
  LABORATORY of SOLID-STATE QUANTUM ELECTRONICS


Dr. Carmen TISEANU
Senior Researcher

National Institute for Laser, Plasma and Radiation Physics
Laboratory of Solid-State Quantum Electronics
PO Box MG-36, Magurele, 077125
Romania

Phone:       +(40) (21) 457-4550 ext. 2127
Fax:           +(40) (21) 457-
4243
Email:        carmen.tiseanu@inflpr.ro
Web page:  http://nanolumin.inflpr.ro


Since 01 August 2017 with:
     X-Ray Microtomography Laboratory

     http://tomography.inflpr.ro/



Research interests

Dr. Carmen Tiseanu collaborative and interdisciplinary research focuses on the luminescence properties of rare earth (lanthanide) doped  nano-hybrids. Along with her collaborators, Prof. Dr. V. I. Parvulescu (University of Bucharest) and Prof. habil. M.U. Kumke (Potsdam University, Germany) she investigates a broad range of sol-gel derived materials containing lathanides, or their complexes with organic ligands and ionic liquids with the aim of establishing structure-luminescence relationships as studied by time-resolved luminescence spectroscopy.

Main topics: Photoluminescence properties of organic/inorganic nanohybrid materials

Photoluminescence spectra and decays of lanthanide-doped
- ionic liquids
- organically modified silicates
- micro and mesoporous materials
- quantum dots
- coordination complexes

Complex deconvolution methods for the analysis of time-resolved photoluminescence spectra.

carmentiseanu
Publication List | Curriculum Vitae
Research

Photoluminescence properties of lanthanides in ionic liquids. Radiative versus non-radiative relaxation processes in lanthanide’s doped ionic liquids immobilized on silica supports. 
Complex spectral deconvolution methods applied to the analysis of the excited state-dynamics of lanthanide’s: Quantified Maximum Entropy, aria-normalized time-resolved luminescence spectra (TRANES), lifetimes distribution, decay associated spectra. Description of species-related luminescence-structure relationships by use of the time-resolved luminescence spectra of Eu3+.
Lanthanide’s ions in microporous and mesoporous materials: the effects of hydrophobization via silylation on the photoluminescence properties of lanthanides exchanged zeolites or double hierarchical mesoporous materials; the effects of the Si to Al ratio on the Ln3+ photoluminescence properties ; the role of the various organic ligands in the luminescence sensitization of Eu3+ and Tb3+ as well as surface modification of silica and MCM-41.
Luminescence properties of quantum dots doped with lanthanide’s ions: the role of the capping ligand and the nanocrystal as sensitizer (antenna effects) or /and inhibitor for the non-radiative process induced via vibrational coupling with water solvent molecules.

http://rawmedcol.com/Optical spectroscopy of transition metal and lanthanide’s ions complexes with natural organic matter (NOM): photochemistry of the natural organic matter (fulvic and humic acids) complexes with Eu3+, Tb3+ and Gd3+; the intramolecular energy transfer, role of the singlet versus triplet states in sensitization of lanthanide’s luminescence; Stern-Volmer quenching models, etc.

Optical spectroscopy of lanthanide’s doped active laser media: energy levels, energy transfer and quenching processes, program codes for the calculation of the crystal-field energy levels, irreducible representations and wave functions of lanthanides with f2 and f12 type configuration;  sensitivity analysis for the crystal-field parameters of  Tm3+ in a series of isostructural garnet laser crystals.

Laboratory of  Solid-State Quantum Electronics