Expertise - Nanoropt

- Characterisation of paramagnetic inorganic and organic compounds - Characterisation of paramagnetic impurities and defects in solids. - Optical characterisation (absorption, fluorescence, raman spectroscopy) of liquids and solids. - Optical investigations of ultrafast dynamics in materials - Determination of nonlinear optical (NLO) properties of molecules in solution.

Technique

- Continuous-wave/pulsed electron paramagnetic resonance (EPR) at 9.5 and 95 GHz - Resonance raman spectroscopy - Fluorescence spectroscopy - Absorption spectroscopy - Picosecond laser spectroscopy - Hyper-Rayleigh scattering (HRS)

Users

- Other research laboraories (universities and research centers) - R&D semiconductor industry and related companies - R&D chemical industry

Keywords

Electron paramagnetic resonance (epr), Resonance raman spectroscopy, Laser spectroscopy, Non-linear optics

Optical spectroscopy of carbon nanotubes; Optical characterization of nanomaterials; Electron diffraction characterization of carbon nanotubes; Sorting of carbon nanotubes;

Technique

Raman spectroscopy; photoluminescence excitation spectroscopy; absorption spectroscopy; electron diffraction; density-gradient ultracentrifugation; aqueous two-phase separation

Users

Researchers

Keywords

Nano optics, Experimental study

* Solubilization, molecular filling, and chirality sorting of carbon nanotubes (CNTs) * Spectroscopic characterization of carbon nanotubes and their nanohybrids * Design of (non-linear) optical molecules and nanomaterials * Non-linear optical characterization of organic molecules and nanomaterials

Technique

* Wavelength-dependent determination of the molecular non-linear optical response (hyperpolarizability) by hyper-Rayleigh scattering with tunable laser wavelength (using a picosecond chirped pulse laser amplifier with optical parametric amplifier, tunable from <300nm to >3000nm) * High resolution resonant Raman spectroscopy with tunable laser wavelength (374-1100nm ; using triple spectrometers with ion lasers, dye lasers, Titanium:sapphire lasers and external cavity frequency doubler) * 2D infrared fluorescence-excitation spectroscopy (with a dedicated, in-house developed, ultra-sensitive setup with liquid nitrogen cooled deep-depletion Si CCD and [extended] InGaAs array detectors sensitive up to 2200nm) * Infrared fluorescence microscopy with hyperspectral imaging * Various chemical preparation equipment (fume hoods, analytical balances, glove boxes for working under inert atmosphere, spin coater, vacuum ovens up to 1100°C, centrifuges [low speed to ultra-speed], etc.) * Cryogenic spectroscopy (down to liquid helium temperature) * Density gradient ultracentrifugation (up to >1000 000g) and aqueous two-phase separation of nanomaterials * Optical absorption spectroscopy (175-3300nm) and fluorescence spectroscopy * Time resolved fluorescence spectroscopy (streak camera) and pump-probe spectroscopy * Quantum-chemical calculations (semi-empirical, DFT) and molecular dynamics simulations

Users

Other collaborating academic researchers or companies.

Keywords

Two-dimensional materials, Laser spectroscopy, Non-linear optical materials, Organic materials, Nanomaterials, Carbon nanotubes