Studierende am PAT Lehr- und Forschungsinstitut
Studierende am PAT Lehr- und Forschungsinstitut

Process Analysis & Technology

Customized solutions are being developed in innovative projects, along with partners from the industry. These contribute to make technical processes and products more powerful, efficient, and sustainable. 

Main research areas

The PA&T represents the center of material research and 100% real-time quality control at the university. The main research areas of the PA&T Center range from polymer technology, surface design, process analytics, and spectral imaging upto green process engineering.


The focus of the department of process analytics has been optical spectroscopy in its entire spectrum in combination with multivariate data analysis.

Spectral Imaging

Hyperspectral Imaging is a major growth area within the image processing industry.

Polymer Technology

The main research interest is the development, modification, and characterization of biomaterials.

Green Process Engineering

The aim of our research is to develop innovative concepts to increase the circularity of material flows

Surface Design

Surface Design includes: Synthesis of functional particles, Advanced materials (etc.), Inline spectroscopy, reaction calorimetry (etc.).

Summary research areas and contacts


Spectroscopy: Prof. K. Rebner and/ orProf. M. Brecht

Spectral Imaging: Prof. M. Brecht and/ or Prof. K. Rebner

Polymer Technology: Prof. G. Lorenz

Green Process Engineering: Prof. D. Almeida Streitwieser

Surface Design: Prof. A. Kandelbauer


The main focus of development in recent years has been the further development of spatially resolved and multimodal techniques for the spectroscopy of liquids and solids.  (UV/VIS, NIR, IR, Raman, fluorescence)
A number of publications have been produced in this field, demonstrating our expertise.

Fields of research:

  •     UV-VIS-NIR-MIR spectroscopy of solids and liquids
  •     Excitation / emission spectroscopy (3D fluorescence)
  •     Analysis of direct and diffuse transmission/reflection, ATR, emission
  •     Spectroscopy of microscopic structures

For further information please contact Prof. K. Rebner and/or Prof. M. Brecht.

Spectral Imaging

A significant growth area within the image processing industry is hyperspectral imaging. This technique simultaneously records spatial and spectral data of objects and thus can provide the corresponding chemical information in addition to morphological changes in the image data. With light outside the visible range, such as infrared light, predictions of chemical distribution and concentration can be made. The output information of such a camera has a significantly higher degree of complexity, but also enables a much higher diversity and selectivity with regard to solvable applications.

For further information please contact Prof. M. Brecht and/  or Prof. K. Rebner.

Polymer Technologie

The focus is on polyurethanes, polyamides and polyesters for use in biomedical and technical applications. Another focus is the synthesis of polymers using "reactive extrusion" for niche applications.


  •     Reactive extrusion
  •     Biomaterials/medical technology
  •     Surface Modification

For further information please contact Prof. G. Lorenz.

Green Process Engineering

The research focus is on the development of (bio)chemical, thermal and mechanical technologies for the revalorization and utilization of secondary raw materials in renewable and alternative energy sources as well as in the production of sustainable materials and green chemicals.

In the experimental field, we are intensively involved in the investigation of

  •     anaerobic and alcoholic fermentation processes,
  •     fast and slow pyrolysis processes
  •     as well as mechanical and (bio)chemical processing.

The aim of our research is to develop innovative concepts to increase the circularity of material flows through chemical recycling, biorefinery concepts, zero-waste strategies, life cycle analyses and mobility of environmental chemicals. These approaches should help to strengthen the bioeconomy and promote the circular economy.

For further information please contact Prof. Daniela Almeida Streitwieser

Surface Design

  • Synthesis of functional particles (organic, inorganic, especially silica particles with customized

  • 3D morphology for various applications in analytics, medical technology and in the technical field)

  • Advanced materials, self-healing surfaces, functional surfaces

  • Inline spectroscopy for reaction tracking and reaction kinetics

  • Reaction calorimetry, real-time reaction calorimetry, thermal analysis, modeling of decomposition and curing reactions

For further information please contact Prof. A. Kandelbauer.

“Process analytics plays a pioneering and central role in many industries today, not only by significantly influencing the efficiency and productivity of manufacturing processes, but also by acting as a key element for quality assurance and sustainability..” — Prof. K. Rebner (Head of PA&T-Center)

“Each photon counts!” — Prof. M. Brecht

"Unfolding the potential of secondary resources into high value products, we engineer a greener and circular future. Through innovative process development, we unlock the potential of residual feedstocks, forging pathways to sustainable solutions and inspiring positive change for generations to come." — Prof. Almeida Streitwieser

Overview of all research projects


our Projects


Ready available technology

Nanocsribe 3-D Drucker
3-D print

Nanoscribe PhotonicProfessional GTTechnologie


Injection moulding process for rapid prototyping

Optical Spectroscopy - UV/VIS - NIR

Desktop-Spektrometer Lambda 1050 von Perkin Elmer

Optical Spectroscopy - FT- MIR / NIR

FTIR-Spektrometer Perkin Elmer Frontier

Optical Spectroscopy - Fluoreszenz

Fluorolog 3 by Horiba

Optical Spectroscopy - Inline

Raman-System RXN1 von Kaiser Optical Instruments

Microscopic Analysis

Image Analysis

Nanoscopic Analysis

Witec alpha300

Chemical Imaging

Chemometrics and Biometrics


Nanoscribe PhotonicProfessional GTTechnologie

The Nanoscribe Photonic Professional GT2 is the world's highest resolution 3D printer for nano and micro fabrication. It therefore meets the highest requirements for printing the smallest 3D precision parts with excellent shape accuracy.

Injection moulding process for rapid prototyping

The process consists of the combination of micro and nano 3D printing with two lithographic impression methods.

In the first step, 3D printing is used to structure and shape the surfaces. Due to the additive manufacturing technology, practically all surface structures can be realized. Only overhanging structural elements have to be avoided due to the subsequent molding steps. The subsequent moulding of the 3D-print structures results in a structured tool insert which can be used in a subsequent step in micro injection moulding to structure the surface of thermoplastic polymers.

Due to the reusability of the tool insert in injection moulding, the structure can be transferred to a variety of components within a short time. Thus, quantities that would not be possible with the original 3D printing can be achieved within a very short time.


Absorption spectra of solids and liquids can be measured with the desktop spectrograph Lambda 1050 from Perkin Elmer. Extinctions up to 4 in a wavelength range from UV up to long wave NIR can be detected. A integrating sphere can be integrated in the spectrometer to measure specular and diffuse reflectance as well as transmission.


IR spectra are being measured with an Perkin Elmer System 2000 FTIR spectrometer. The sample can be measured in transmission, diffuse reflectance or in ATR mode.

Optical Spectroscopy - Fluoreszenz

The fluorescence spectrometer Fluorolog 3 from Horiba enables fluorescence measurements in a wavelength range from 200 to 700 nm. The emission spectra can be recorded from 300 to 1000 nm with a signal-to-noise ratio of 4000:1. This system enables the measurement of 3D spectra by successive scanning through the excitation wavelengths.

Optical Spectroscopy - Inline

The RXN1 Raman system from Kaiser Optical Instruments can be used for inline measurements for analysis and monitoring of chemical processes. In addition, solids, powders, gels and liquids can be measured online with various probes.

Image Analysis

The microscopic methods range from dark field / bright field microscopy through polarisation- and inverse micros­copy to techniques like differential interference con­trast (DIC) or circular polarisation (CP).

The inte­gra­ted soft­ware quantifies the morphological struc­tures. Thus the computer calculates, for example, distri­bu­tions or fine­ness of fibre bundles or areas of corrosion.

Nanoscopic Analysis

Atomic Force Microscopy (AFM)
Scanning Nearfield optical Microscopy (SNOM)
Scanning Nearfield Optical Spectroscopy (SNOS)

SNOM and SNOS with Aperture-based and Aperture-less Probes

Our unique, multimodal microscopy system allows AFM, SNOM and SNOS in various modi and combinations:

  • Use of apertureless probes (SIL) or aperture-based probes (pinhole pyramids)
  • Measurement in reflexion or in transmission

SNOS: VIS-, NIR-, Raman-, Back Scattering- and Fluorescence Spectroscopy

The combination of AFM, near field (SNOM, SNOS) and far field techniques (e.g. Raman Imaging, confocal Microscopy) on the same instrument allows us to analyze the same sample position with various measuring setups.

Chemical Imaging (CI)

Chemical Imaging (CI) combines different technologies like optical microscopy, digital imaging and molecular spectroscopy in combination with multivariate data analysis methods.

Methods of data-analysis

After the collection of the spectroscopic data, different strategies are applied to extract the most important and fundamental information from a large set of data.Experimental design is used to select or design the sample and data set. The recorded data are illustrated, evaluated, summarised and reviewed carefully. Based on a recog­nised pattern, a calibration model is calculated and tested, i. e. applied to another set of samples. If this test gives reasonable results, the model is verified and, finally, will be generalised to meet the requirements in the “real world” at the production line.

Additionally, this fundamental model serves as guide­line for the design and construction of a monitoring system for on-line or in situ process control.

Process Analysis Tools

  • Correlation and regression methods
  • Unscrambler, Design Expert, SPSS, SIMCA
  • Time series, data visualisation
  • MatLab Toolbox, PLS - Toolbox

Analysis, Modelling and Simulation (Selection)

  • Principal Component Analysis (PCA)
  • Partial Least Square Regression (PLS)
  • Multivariate Curve Resolution (MCR)
  • Neuronal Networks (Kohonen, RBF)
  • Clustering (hierarchical, K-mean)

Evolving Factor Analysis (EFA) and Multivariate Curve Resolution (MCR)

EFA and MCR are procedures that calculate the number of relevant chemical compounds and their concentration, respectively, directly from the reaction spectra.

Analysis, modeling and simulation (selection)

  • Principal Component Analysis (PCA)
  • Partial Least Square Regression (PLS)
  • Multivariate Curve Resolution (MCR)
  • Neuronal Networks (Kohonen, RBF)
  • Clustering (hierarchical, K-mean)

Evolving Factor Analysis (EFA) and Multivariate Curve Resolution (MCR)

EFA and MCR are methods that calculate the number of relevant chemical compounds or their concentration directly from the reaction spectra.


There is a capable team behind every research project. Find out more about the professors and staff in the Process Analysis & Technology research area.