NBTG Print E-mail

1. Laboratory: NBTG

Prof. Dr. C. Sönnichsen
Institute for Physical Chemistry
Jakob Welder Weg 11
D-55128 Mainz, Germany


2. Contact point:
Name: Dr. Carsten Sönnichsen
Position: Professor
Email: Soennichsen"you know what"uni-mainz.de
Tel.: +49 (0) 6131 39 24313
Fax.: +49 (0) 6131 39 26747

3. Access rules:

Facilities availability for external users:

Yes, in principle; 

Expenses reimbursement type:

Non-for-profit use for national institutions or other bodies;
and commercial use for any external customer;

Rules on cooperation:



4. Equipment


5S1. - Absorption Spectroscopy,  Wavelength range: 250 – 1000 nm
5S2.- Fluorescence Spectroscopy,  Wavelength range 250 – 1000 nm
5S3. - Scattering Spectroscopy,  Wavelength range: 450 – 850 nm


5M1.- Transmission Electron Microscopy, Resolution: 0.5 nm
5M2.- Darkfield Microscope, Resolution: 1 m
5M3. - Fluorescence Mircoscope, Resolution: 1m
5M4. - Scanning Electron Microscope, Resolution: 100 nm

Radiation sources

5R1.Wide band light source (Halogen), Output Power: 0.1 W
5R2.- Wide band light source (LASER), Output Power: 3 W (Range: 400 – 2000 nm)
5R3. - LASER, 450 nm; Output Power: 39 mW
5R4. - LASER, 633 nm; Output Power: 10 mW


6. Expertise


- Literature:“Spectroscopy of single metallic nanoparticles using total internal reflection microscopy”, Applied Physics Letters, Year: 2000, Vol: 77, Pages: 2949 – 2951


- Literature: “Gold nanoparticle growth monitored in situ using a novel fast optical single-particle spectroscopy method”, Nano Leters, Year: 2007, Vol: 7, Pages: 1664-1669


Table: Expertise by material type and sample geometry combinations:

Materials types
Complex shape object Bulk samples or bars
Substrate layer(s) on substrate



Thin films

Isotropic materials
          R, optical  
Photonic crystals           R, optical  
           R, optical  
Mesoscopic samples              
Bianisotropic           R, optical  
inversion symmetrical
          R, optical  
Active materials            R, optical  
Controllable materials           R, optical  
Diffraction gratings              
Scattering media              

Notation used here:

Frequency range: MHz, GHz, THz or optical
R - reflection coefficient amplitude or intensity;
T - transmission coefficient or intensity,
P - phase information;
A - reflection and transmission on many angles of incidence;
E - ellipsometry data;
D - ray velocity direction or distortion (do not mix, please, with isotropic refraction index characterization);
S - internal structure investigation with microscopy (nanoscopy);
Ch - chemical properties investigation (metal or dielectric etc.);
Chi(2)/Chi(3) of the material