Research
Equipment

Research equipment and facilities

On this page you'll find the research equipment of the professorships and the individual working groups.

RESEARCH DEVICES PROFESSORSHIP FUNCTIONAL NANOSTRUCTURES

The devices of the Professorship for Functional Nanostructures are supervised by members of the working groups Bigall, Dorfs and Lauth and are used within the department across groups. On request, we also investigate samples from other research groups.

Scientific Devices of the Bigall Group

  • Optical Spectroscopy

    Edinburgh FLS 1000 UV-Vis-NIR Photoluminescence Spectrometer

    © Sven Getschmann

    With the FLS1000 from Edinburgh Instruments, the Department of Functional Nanostructures has a state-of-the-art photoluminescence spectrometer for measuring emission and excitation spectra with high resolution and a measuring range of 200-1600 nm at hand. Time-resolved measurements using pulsed lasers for excitation are also possible in the subnanosecond range. Various sample holders are available for the measurement of solutions, solids and coatings, as well as an integrating sphere for the measurement of quantum yields and reflectivities.

    Oxford Instruments OptistatCF Cryostat

    The optical cryostat OptistatCF of Oxford Instruments can be combined with both high-end spectrometers (FLS1000 and CARY 5000) of the Department of Functional Nanostructures, so that spectroscopic investigations in the range of 200-2500 nm at different temperatures are possible. The measuring range is from 500 K to 3.4 K (in operation with liquid helium) and 77 K (in operation with liquid nitrogen).

    Horiba Dual-FL UV-Vis photoluminescence spectrometer with integrating sphere Quanta Phi

    © Sven Getschmann

    The DUAL-FL from Horiba is a combination of a Bench-Top-Spectrofluorometer and a UV/Vis Spectrophotometer. Emission, extinction and excitation spectra can be detected in the range of 200-1000 nm. By the installation of the integrating sphere "Quanta-Phi" the detection of quantum yields of fluorescent systems is possible. Furthermore, this instrument is connected to one of our gloveboxes, which makes it possible to also measure water- and air-sensitive samples under inert gas atmosphere.

  • Photoelectrochemistry

    Spectroelectrochemical and Electrochemical Setup

    © Sven Getschmann

    Two potentiostats (Solartron ModuLab XM ECS, Princeton Applied Research PARSTAT 3000A-DX bipotentiostat), different light sources (xenon lamp with monochromator and chopper, different LEDs), a function generator (to control the LEDs), and a 7270 DSP lock-in amplifier from Signal Recovery are available for the photoelectrochemical characterization of nanoparticles and nanoparticle assemblies. The combination of Lock-In Amplifier and Potentiostat allows the detection of very low (photo-)currents in the pA range, e.g. the charge carrier dynamics in single particles and assemblies. In addition, both potentiostats are impedance-capable (frequencies up to 7 MHz).

  • Microscopy

    Zeiss Laser Microscope Setup

    © Sven Getschmann

    The laser microscope setup consists of an upright microscope of the Zeiss Axio Imager. D2m type, coupled with the ProRes CapturePro 2.8.8 camera and the ROE DL-Series laser source (wavelength 405nm) with the UGA-42 Firefly program. The integrated, additional photomanipulation system is designed for fast, dynamic illumination of points or user-defined areas in the microscope's field of view. The illumination spot is as small as a submicron. This laser microscope is widely used in optogenetics, neural mapping, photoactivation, photo-stimulation, etc.

  • Thermogravimetric analysis

    Mettler Toledo TGA/DSC 3+

    © Sven Getschmann

    The Department of Functional Nanostructures owns a TGA/DSC 3+ from Mettler Toledo for thermogravimetric analysis. This allows mass changes between room temperature and 1100 °C to be measured both under nitrogen and air flow, e.g. for the determination of organic sample proportions. Thanks to SDTA technology, it is also possible to measure the heat flow.


  • Nitrogen-Physisorption

    Quantachrome Nova 3200e

    © Sven Getschmann

    The Quantachrome Nova 3200e is used for the determination of specific surfaces and pore sizes/volumes of nanoparticle assemblies and other porous materials. Sample preparation of up to four samples simultaneously can be performed under vacuum or in a nitrogen stream at temperatures of up to 350 °C. The sample preparation can be performed under vacuum or in a nitrogen stream. During the subsequent measurement (up to three samples simultaneously), micro- and mesopores from a diameter of about 0.5 nm can be detected. Nitrogen is used as a standard adsorptive gas, but other gases (Ar, CO2, etc.) can also be used.

  • Zetasizer

    Malvern Panalytical Zetasizer Nano ZSP

    © Sven Getschmann

    The Zetasizer Nano ZSP from Malvern Panalytical allows the analysis of particle behavior in solution. With this device, both particle sizes and the zeta potential of the particles can be determined via dynamic light scattering. The instrument is equipped with a 633 nm laser. Automated pH-dependent measurements are also possible with the available autotitrator.

    Partikel Analytik Field ESA/Zetasizer

    © Sven Getschmann

    This ESA/Zeta potential measuring instrument enables the measurement of highly concentrated (up to 74 vol%), turbid or viscous dispersions. The instrument has an electro-acoustic amplifier as well as a temperature, conductivity and pH probe (measuring range: 2-14). The integrated titration module (two-way piston pumps with 1.0 µL resolution) enables potentio & volumetric determination of the effect of additives on suspensions as well as automatic determination of the isoelectric point. For more accurate determination of the particle size guide value (1 nm to 50 µm), the measurement is performed at three different frequencies.

  • Synthesis

    MBraun Inertgas-Glovebox-Systems

    © Sven Getschmann

    There are two single and two double glove boxes available from MBraun (models Labstar, 2x UNIlab Plus and MB-200B). All glove boxes are equipped with solvent filters (activated carbon or molecular sieve), three of them are also equipped with a freezer. The glove boxes are primarily used for the storage and safe handling of air- and moisture-sensitive as well as toxic chemicals. In addition, extinction and emission spectra of solutions can be measured with the Dual-FL via fiber optics. It is also possible to perform photoelectrochemical measurements under inert conditions.

    Quorum E3100 Critical Point Dryer

    © Sven Getschmann

    The Quorum E3100 Critical Point Dryer is a versatile device for gentle drying of macroscopic structures and enables the production of aerogels with extremely large specific surfaces. First the alcohol in the samples is displaced by liquid CO2, which then passes into the supercritical phase by increasing the temperature (1100psi, 31.5 °C). After the CO2 has been released, the dry sample is obtained. The instrument itself has a robust design with a horizontal cylindrical chamber (63.5 x 82 mm) and various sample holder sizes. The CO2 content is visible through the window during the drying process and the decisive parameters (pressure and temperature) can be monitored on site. The instrument is connected to a temperature-controlled water bath with exact heating and cooling capability.

    Christ Freeze Dryer LD 1-2 plus

    © Sven Getschmann

    The freeze dryer is used for the lyophilization of aqueous samples. This instrument has 3 unheated shelves as well as additional connections for 8 round flasks, wide-neck filter closure bottles or distributor pieces for ampoules. With a condenser temperature of -55 °C and a maximum negative pressure of 0.011 mbar, a maximum of 2 kg/24 h of water can be frozen.

Contact: Prof. Dr. Nadja-C. Bigall

Scientific devices Dorfs group

  • Optical Spectroscopy

    Horiba Fluoromax 4 Spectrofluorometer

    © Sven Getschmann

    The Fluoromax-4 is a bench-top spectrofluorometer which, in addition to recording emission and excitation spectra up to 850 nm, allows time-correlated single-photon counting lifetime measurements (TCSPC with 200 ps lower limit). The device is equipped with a dual monochromator system and allows measurements of liquid and solid samples in special holders. To determine the lifetime of the samples, various NanoLED picosecond laser sources with wavelengths from UV to visible are used.

    CARY 5000 UV-Vis-NIR Spektrophotometer

    The research section Functional Nanostructures has a CARY 5000 spectrophotometer manufactured by Agilent Technologies at hand. This high-end spectrometer is capable of transmission and extinction measurements of liquids, coated transparent materials and powders in a spectral range of 175-3300 nm in high resolution. In addition, if required, the instrument can be equipped with expanding accessories such as a DRA-2500 integrating sphere for the measurement of absorption and reflection spectra or a thermostat-controlled 1x1 Peltier cell holder for temperature-dependent transmission and extinction spectroscopy.

  • Laser

    Continuum SL II-10 Pulsed Laser

    The Dorfs group works with a setup which has is a pulsed neodymium-YAG laser manufactured by Continuum as core element. This device is capable of emitting high-energy light pulses of 5 ns length with a wavelength of 1064 nm and a maximum energy of 475 mJ per pulse through nanoparticle solutions. With the help of several exchangeable harmonic crystals, further wavelengths (532nm, 355nm and 266nm) can be generated. The energy hitting the samples can be gradually attenuated in the existing setup using OD filters and detected by a Coherent pyroelectric energy sensor. The irradiated solutions can be stirred with a stirrer enclosed in the cuvette holder of the setup.

Contact: PD Dr. Dirk Dorfs

Scientific devices of the Lauth group

  • Ultrafast spectroscopy

    Transient absorption spectrometer Helios Fire

    NEW HELIOS FIRE IS ON THE WAY...

    The research section Functional Nanostructures has at its disposal a HELIOS FIRE Transient Absorption Spectrometer from Ultrafast Systems. The instrument enables a comprehensive investigation of the type, origin and temporal course of photo-excited charge carrier states of optically interfering systems. The samples to be investigated are excited from the ground state with an ultrashort excitation laser pulse (~100 fs), while a time-shifted interrogation laser pulse images the sample response at different times after excitation. The HELIOS FIRE covers an optical broadband range of 350 - 1600 nm. Samples can be characterized in solution or as films. The optical excitation is covered over a wide spectral range by an OPA (~260 nm - 2100 nm).

     

     

Contact: Dr. Jannika Lauth

RESEARCH EQUIPMENT NANOSTRUCTURED FUNCTIONAL LAYERS AND MATERIALS

Equipment in the Research Area Nanostructured Functional Layers and Materials are maintained by group members.

On request, members of other groups can be trained to operate the instruments or we analyze your specimens.

Equipment of research groups Caro/Feldhoff

  • Electron microscopes (Competence Facility)

    The Research Group operates two high-resolution electron microscopes (FE-SEM and FE-TEM) with field-emission electron sources and spectrometers for elemental analysis. The Laboratory for Electron Microscopy has been recognized by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) as Competence Facility: Terms and Conditions (German only)

    [Translate to English:] Feldemissions-Rasterelektronenmikroskop (FE-REM)

    Field-Emission Scanning Electron Microscope (FE-SEM)

    JEOL JSM-6700F / Info

    • Secondary electron detector
    • Semi-in-lens detector for small working distances
    • Backscattered electron detector (BSE)
    • Energy-dispersive X-ray spectrometer (EDXS), Oxford Instruments INCA 300 (detection from Be on)
    • Resolving power: 1.0 nm @ 15kV; 2.2 nm @ 1kV
    • Acceleration voltage: 0.5 - 30 kV

    Field-Emission Transmission Electron Microscope (FE-TEM)

    JEOL JEM-2100F-UHR / Info

    • Transmission Electron Microscopy (BF, DF, HRTEM)
    • Scanning Transmission Electron Microscopy (STEM with BF, HAADF)
    • Electron Diffraction (SAED, CBED, also energy-filtered)
    • Energy-Filtered Transmission Electron Microscopy (EFTEM)
    • Electron Energy Loss Spectroscopy (EELS, ELNES), Gatan Imaging Filter, GIF 2001, with 1k-CCD Camera
    • Energy-Dispersive X-ray Spectroscopy (EDXS), Oxford Instruments INCA 200, detection from Be on
    • Schottky field-emitter (ZrO2/W(100))
    • Acceleration voltage: 200 kV (160 kV)
    • Point-resolution: ≤ 0,19 nm  (Cs = 0.5 mm)
    • Lattice resolution in STEM: ≤ 0.2 nm
    • Energy resolution in EELS :  ≤ 0.7 eV
  • X-Ray Diffractometer (XRD)

    Bruker D8 Advance / Info

    • X-ray diffraction with Cu-Kα1,2 radiation
    • 1-dimensional LynxEye detector (silicon strip)
    • motorized slits (divergence and receiving
    • 9 position sample changer
    • sample spinner

     measuring geometries:

    • Bragg-Brentano
    • grazing incidence
    • foil transmission

     

     In-Situ cell Anton Paar 1200N

    • temperature rannge: RT-1200 °C
    • environmental heater
    • programmable temperature controller
    • variable atmosphere (air, N2, Ar, CO2) or vacuum
  • Thermoelectric characterization

    NorECs ProboStat A

    OBSERVABLES

    • Seebeck coefficient of single materials under air atmosphere
    • electric voltage-current curves for thermogenerators

     

    FEATURES

    • measurement setup with platinum electrodes
    • high-temperature oven (room temperature to 1000°C) with programmable RS-232 controller
    • two Keithley 2100 6/12 digit multimeters
    • sinus generator automatized data collector with Lab View software

    ThermoGen Vacuum Setup

    OBSERVABLES

    • Seebeck coefficient of single materials in air, vacuum or under inert gas
    • electric voltage-current curves for thermogenerators

     

    FEATURES

    • measurement setup with resistive heater (room temperature to 600°C)
    • active Peltier cooler
    • two Keithley 2100 6/12 digit multimeters
    • sinus generator
    • automatized data collector with Lab View software

    Electrical Conductivity Analyzer

    OBSERVABLES

    • isothermal electrical conductivity of single materials under air atmosphere

     

    FEATURES

    • measurement setup with platinum electrodes
    • three-zone high-temperature oven (room temperature to 1000°C) with programmable RS-232 controller
    • two Keithley 2100 6/12 digit multimeters
    • sinus generator
    • automatized data collector with Lab View software
Contact: Prof. Dr. Armin Feldhoff

RESEARCH EQUIPMENT COMPLEX INTERFACES AND MOLECULES

  • Simulation Software

    The AG Becker uses a computing cluster for quantum chemical simulations on a larger scale. The group has experience with the following programs:

    • Amsterdam Modeling Suite
    • VASP (Vienna Ab Initio Simulation Package)
    • CPMD (Car Parinello Molekül Dynamik)
    • Gaussian
  • Experimental Equipment

    Atomic Force Microscopy (AFM)

    The research group Becker uses two NanoSurf AFM for topographic sample analysis.

    Desktop REM

    FEI Phenom Desktop REM

    High Temperature Video Microscope

    Ultra-high vacuum system in which samples and reaction cells are heated and can be observed with an HT videomicroscope using either an NIR or optical camera.

    Abbe Refractometer

    Quantum chemical calculations can be used to determine the refractive indices of substances that are in good agreement with the experimentally determined data.

    UHV system with HT-AES and quadrupole MS

    Ultra-high vacuum system in which high temperature Auger electron spectroscopy and mass spectrometry can be applied to samples on a movable sample holder with heater and heat shields.

    • reflected/transmitted light microscopes
    • Ultramicrobalance
    • Various high temperature furnaces
    • Equipment for chemical transport reactions
Contact: Prof. Dr. Jörg August Becker
  • Spectrometer
    • Coaxially Oriented Beam-Resonator Aggrangement (COBRA) Fourier Transform-Microwave (FTMW) Spektrometer
    • Scanning Probe-Microwave (SP-MW) Mikroskop
    • I/Q­Modulated Passage-Acquired­Coherence Technique (IMPACT) FTMW-Spektrometer
    • Wideband-I/Q­Modulated Passage-Acquired­ Coherence Technique (WIDE-IMPACT) FTMW-Spektrometer
    • LASER-ablation, DC-discharge, heated, fast-mixing, and standard pulsed supersonic-jet expansion sources
Contact: Prof. Dr. Jens-Uwe Grabow

RESEARCH DEVICES DYNAMICS IN HETEROGENEOUS CATALYSIS

Lab equipment Imbihl Group

  • Photoemission Electron Microscopy (PEEM I)

    The PEEM 1 laboratory contains a standard ultra-high vacuum chamber (UHV chamber) equipped with a photoemission electron microscope (PEEM) to study pattern formation on single crystal surfaces. The chamber is also equipped with an Auger electron spectrometer with a cylindrical mirror analyzer (CMA) from Pelkin Elmer to investigate the chemical surface composition. A LEED (low energy electron diffraction) optics (Varian) is used to determine the surface structure.

    Furthermore, a home-built electron beam evaporator is used for the preparation of thin metal or metal oxide layers. For sample cleaning, a sputter gun from Leybold-Haereus is available, which can be used for sample cleaning.

    The pressure is measured by a Varian ionization gauge, the temperature by a type K-type thermocouple. The temperature can be adjusted via a resistive heater (Ta wires, 0.25 mm diameter) by means of a temperature controller. An electron bombardment heater is used to achieve high temperatures (higher than 700 °C). In addition, various gases (hydrogen, oxygen, argon) can be introduced via leak valves whose flow is regulated by mass flow controllers.

  • Photoemission Electron Microscopy (PEEM II)

    The PEEM 2 laboratory focuses on the observation of reaction-induced restructuring of transition metal oxides and pattern formation during catalytic surface reactions. The experiments are carried out in an ultra-high vacuum chamber (UHV chamber, base pressure 1*10-9 mbar), which is operated as a continuous flow reactor. The vacuum is generated by four turbomolecular and one titanium sublimation pump. Using a differentially pumped gas inlet, different gases (oxygen, hydrogen, methanol, ammonia, carbon monoxide, nitrogen monoxide) in the pressure range from 10-9 to 10-4 mbar can be introduced into the chamber.

    The UHV chamber is equipped with a photoemission electron microscope (PEEM), a differentially pumped quadrupole mass spectrometer (QMS, Hiden Analytical HAL IV), a low energy electron diffraction optics (LEED, Vacuum Science Instruments ErLEED 150) and an Auger electron spectrometer (AES, Staib Instruments ESA 100).

    Thin transition metal and transition metal oxide films can be deposited with an electron beam evaporator (tectra) and characterized with the available surface analysis techniques. An Ar+ sputter gun (Specs) is available for sample preparation. The samples can optionally be heated by a resistive heater (up to 750 °C) or an electronbombardment heater (up to ~1200 °C). In the temperature range 20 to 750 °C linear heating and cooling ramps (0.1 - 10 °C/s) are also possible.

  • Scanning Tunneling Microscopy (STM)

    The STM laboratory is used to image the structure of thin transition metal and transition metal oxide films and their structural changes during catalytic reactions at the atomic level. It is equipped with an ultra-high vacuum chamber (UHV chamber, base pressure 1*10-10 mbar), which, in addition to the scanning tunnelling microscope (DME), has a LEED optics (low energy electron diffraction, Omicron) and a cylindrical mirror analyzer (CMA, Physical Electronics Industries) for Auger electron spectroscopy. The vacuum is generated by two turbomolecular pumps and one ion getter pump. The samples to be examined can be heated to a temperature of up to 1200 °C with an electron bombardment heater.

    An Ar+ ion gun and an electron beam evaporator for the deposition of thin metal and metal oxide films are available for sample preparation. Different reaction gases can be introduced into the chamber via a differentially pumped gas screen.

    In situ observations of the processes during catalytic surface reactions are thus possible. Measurements of the reaction rates are possible with a quadrupole mass spectrometer (Balzers Prisma).

Contact: Prof. Dr. Ronald Imbihl

RESEARCH DEVICES POLYMERS AND BIOMATERIALS

coming soon

Contact: Prof. Dr. Marie Weinhart

RESEARCH DEVICES MOBILITY OF IONS IN SOLIDS

Lab equipment Heitjans group