Practical trainings, student assistants and theses

Development and experimental investigation of a multi-channel flow body sensor (Id 421)

Bachelor theses / Master theses / Diploma theses / Compulsory internship

The development of a multi-channel flow body sensor according to patent WO 2010/069307 A1 aims to quantify the gas content in flow-carrying components. A decisive advantage of this sensor lies in its optical measuring principle, which is based on fiber-optic coupling and the analysis of the light output signal. This avoids electrical potentials in the measuring area, offering significant advantages over electrical measuring methods (intrinsic safety), especially for explosive mixtures.

Preliminary tests at the Institute for Experimental Fluid Dynamics at the Helmholtz Center Dresden-Rossendorf on gas-liquid flows showed that a clear binarization of the sensor output signal can be achieved due to the capillary effects in narrow channels and the different refractive indices of the gas and liquid phases. Building on previous work with a single-channel sensor prototype based on a polymer optical fiber (POF) with a diameter of 1 mm, the following tasks must be completed as part of further research.

Tasks:

  • Adjusting the POF diameter to 1.5 mm in the single-channel configuration.
  • Conducting experimental investigations of the new single-channel prototype using the already developed test system and evaluation programs.
  • Designing a multi-channel sensor body for gas content measurements in the system.
  • Developing a transition adapter to optimize the flow distribution between the DN10 flow pipe and the sensor body.

Department: Fluid process engineering

Contact: Condriuc, Ivan, Dr. Kipping, Ragna

Requirements

  • Students majoring in fields such as process engineering, mechanical engineering, or chemical engineering.
  • Interest in fluid mechanics and the development of measurement technology.
  • Experience with 3D CAD tools.
  • Basic knowledge of Python programming

Conditions

Start date: 01.01.2025
Duration: according to the respective study regulations

Online application

Please apply online: english / german

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Numerical investigation of particle mixing (Id 419)

Master theses / Diploma theses / Compulsory internship

Fine-grained solid particles from various industrial sources, which would otherwise be discarded, should ideally be processed to valuable products or inert residues. They contain valuable residuals, such as metals, that can be returned to the industrial cycle instead of being landfilled. This is one aim of the Helmholtz project FINEST in which this work is embedded.
The different finest powders need to be mixed and agglomerated for further processing. Our work in the project deals with the granular mixing. One aim is to describe particle flow based on the rheology of the bulk good while describing the mixing process among the particles using a transport equation.
The mixing process among particles is described by the transport equation. It needs to be coupled with the flow field of the particle bulk. The latter can be modelled by CFD, using e.g. FEM. Here, a rheologic model is required.
We are looking for someone with experience in CFD or other modelling to continue the implementation of this model.

Department: Particle dynamics

Contact: Baecke, Anna Magdalena, Dr. Lecrivain, Gregory

Requirements

  • Student of e.g. Process Engineering, Chemical Engineering, Computational Engineering, Mechanical Engineering, …
  • General interest in fluid mechanics and simulations
  • Preliminary experience in CFD, ideally OpenFOAM
  • Preliminary experience in code development (C++) optional

Conditions

  • Start after September 2024
  • Duration of internship or thesis according to study regulations
  • Remuneration available, scholarship holders (e.g. ERASMUS+) welcome

Online application

Please apply online: english / german

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Mutation and Enrichment Studies in the Context of Directed Evolution using Multiple Phage Display Experiments (Id 417)

Master theses / Diploma theses / Compulsory internship

The application of phage surface display (PSD) technology has accelerated developments in the field of biomolecular sensors and materials science. A practical complement to this technology is Next-Generation Sequencing (NGS). In this combination, a more comprehensive view of biopanning rounds with a deep insight into the entire sequence space is made possible. It is possible to identify sequencing artefacts, determine sequence number and structure, recognize binding motifs and observe the evolution of the phage library over the course of an experiment. PSD in combination with biopanning is able to select candidates with high affinity and selectivity to the desired substrates from large peptide libraries. In practice, this specific enrichment of peptides leads to a reduction in library diversity. It should therefore be possible to better visualize this reduction in sequence space using data clustering methods in order to better understand distances between similar sequence families.

Department: BioKollekt

Contact: Bloß, Christoph

Requirements

Prerequisite is a valid enrollment in a Master's program in bioinformatics, biotechnology, molecular biology, biochemistry, biology or a related natural science program. Furthermore:

- Interest in data cluster methods and bioinformatics
- Basic knowledge in bioinformatics, statistics, stochastics and clustering
- Experience with a programming language (e.g. Python, R, C, C++ or other)
- Ability to work independently and in a team
Interested students are invited to submit their application documents including CV, last academic transcript and letter of motivation.

Conditions

The topic is to be worked on as part of a Master's thesis in conjunction with a mandatory internship. This results in a duration of 12 months. The duration can be extended or adjusted in consultation with the supervisor. We can offer you:

- An innovative multidisciplinary research environment related to relevant issues in resource technology
- Supervision by experienced scientists and researchers
- Practical experience in the field of bioinformatics and directed evolution

Online application

Please apply online: english / german

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Structuring 2D materials via nanolithography (NanoFrazor) (Id 414)

Bachelor theses / Master theses / Diploma theses

**Tasks:**
1. Investigate nanolithography techniques using the Nanofrazor for the structuring of 2D materials
2. Optimize process parameters for precise control of size and shape of generated nanostructures
3. Characterize the modified 2D materials
4. Evaluate the manufactured nanostructures
5. Compare the performance of different nanolithography approaches and identify optimization
opportunities

Department: Nanomaterials and Transport

Contact: Zscharschuch, Jens

Requirements

**Requirements:**
1. Enrolment in a master's program in materials science, chemistry, physics, or a related field
2. Interest in nanotechnology and nanolithography
3. Basic knowledge in the fabrication and characterization of 2D materials
4. Experimental skills in working with laboratory techniques
5. Independent work ethic and teamwork capabilities

Conditions

**We offer:**
1. An innovative research environment with state-of-the-art laboratory equipment.
2. Supervision by experienced scientists.
3. Opportunities to participate in conferences.
4. Practical experience in the field of nanotechnology and materials science.

The master's thesis has a duration of six months. Extension or adjustment of the duration can be
discussed with the supervisor.

Interested students are requested to submit their application documents, including a resume,
university transcript and a motivation letter.

Online application

Please apply online: english / german

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2D Material Exfoliation Optimisation (Id 413)

Bachelor theses / Master theses / Diploma theses

**Tasks:**
1. Investigate various exfoliation methods for 2D material fabrication
2. Optimize exfoliation processes to achieve high-quality, thin layers
3. Characterize the synthesized 2D materials using advanced analysis methods
4. Evaluate the electronic, optical, and mechanical properties of the exfoliated 2D materials
5. Compare the performance of different exfoliation approaches and identify optimization
opportunities

Department: Nanomaterials and Transport

Contact: Zscharschuch, Jens

Requirements

**Requirements:**
1. Enrolment in a master's program in materials science, chemistry, physics, or a related field
2. Interest in nanomaterial science
3. Basic knowledge in the synthesis and characterization of materials
4. Experimental skills in handling laboratory equipment
5. Independent work mentality and ability to work in a team

Conditions

**We offer:**
1. An innovative research environment with state-of-the-art laboratory equipment.
2. Supervision by experienced scientists.
3. Opportunities to participate in scientific conferences.
4. Practical experience in the field of materials science.

The master's thesis has a duration of six months. Extension or adjustment of the duration can be
discussed with the supervisor.

Interested students are requested to submit their application documents, including a resume,
university transcript and a motivation letter.

Online application

Please apply online: english / german

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Student internship, research assistant, school practical training, master/diploma thesis, compulsory internship (Id 407)

School practical training / Student practical training / Bachelor theses / Master theses / Diploma theses / Student Assistant / Holiday job / Compulsory internship / Volunteer internship / Research Assistant

At Helmholtz-Zentrum Dresden-Rossendorf (HZDR), over 1,500 employees from more than 70 nations are conducting cutting-edge research in the fields of ENERGY, HEALTH, and MATERIALS to address the major challenges facing society today.
The Center for Advanced Systems Understanding (CASUS), founded in Görlitz in 2019, is a German-Polish interdisciplinary research center focusing on data-intensive digital systems.
CASUS offers student internships in a wide range of scientific fields. You are welcome to apply and join CASUS if you are interested in gaining knowledge in the following research areas:

  • Theoretical Chemistry
  • Earth System Science
  • Systems Biology
  • Digital Health
  • Computational Radiation Physics
  • Theory of complex systems
  • Dynamics of Complex Living Systems
  • Machine Learning for Infection and Disease
You can also apply to join our administrative team as a student assistant.

Institute: CASUS

Contact: Dr. Mir Hosseini, Seyed Hossein, Mazur, Weronika, Dr. Calabrese, Justin, Dr. Martinez Garcia, Ricardo, Dr. Bussmann, Michael, Dr. Cangi, Attila, PD Dr. Kuc, Agnieszka Beata, Dr. Yakimovich, Artur, Dr. Knüpfer, Andreas, Dr. Schlechte-Welnicz, Weronika

Requirements

  • Student in computer science, physics, chemistry, or related fields
  • Student already enrolled at the university in Germany, Poland or Czech Republic (close exchange and attendance in the office preferable and combined with the moblie working from Germany combinable)
  • Eager to learn new skills
  • Strong motivation to work in a collaborative environment
  • Preliminary experience in code development is an advantage
  • Excellent communication skills in English and/or German or Polish

Conditions

  • A vibrant research community in an open, diverse and international work environment
  • Scientific excellence and extensive professional networking opportunities
  • A wide range of qualification opportunities
  • We support a good work-life balance with the possibility of part-time employment, mobile working and flexible working hours
  • Either an immediate start or a start in 2024 is possible
Please submit your application (including a one-page cover letter, CV, academic degrees, transcripts, etc.) online on the HZDR application portal

Online application

Please apply online: english / german

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Automatisierte Auswertung von 1D- und 2D-Ramanspektroskopischen Meßreihen (Id 393)

Bachelor theses / Master theses / Diploma theses

1D- und 2D-Ramanspektroskopische Meßreihen oder auch Maps liefern detaillierte ortsaufgelöste chemische Informationen über die untersuchten Proben. Damit kann z. B. die Komponentenverteilung in Stoffgemischen quantitativ bestimmt oder die Homogenität einphasiger Proben gezeigt werden. Andererseits lassen sich lokale Strukturveränderungen, Spannungszustände, Stapelfolgenänderungen in 2D-Materialien und Punktdefekte charakterisieren. Voraussetzung dabei ist eine möglichst engmaschige Datenerfassung bis hin zur Auflösungsgrenze der verwendeten Laserstrahlung sowie eine große Anzahl an Messpunkten. Mit modernen Spektrometern sind Messzeiten im Sekundenbereich gut realisierbar. Die Umsetzung der spektroskopischen in eine chemische Information erfordert dann die Extraktion von Parametern wie Schwingungsfrequenz, Intensität und Linienbreite durch Spektrenanpassung. Die Gerätesoftware bietet dafür nur eingeschränkte Möglichkeiten.
Im Rahmen einer Graduierungsarbeit oder Hilfstätigkeit soll in Zusammenarbeit mit dem HZDR-Rechenzentrum ein Auswertealgorithmus für die automatisierte Auswertung von 1D- und 2D-Ramanspektroskopischen Meßreihen entwickelt, an Beispielen getestet und dokumentiert werden.

Department: Nanocomposite Materials

Contact: Dr. Krause, Matthias

Requirements

1. Studium der Werkstoffwissenschaften, Physik oder Chemie
2. Interesse, Freude und Befähigung für wissenschaftliche Arbeit
3. Grundkenntnisse in Programmierung und sicherer Umgang mit Büro- und wissenschaftlicher Software
4. Sehr gute Englisch-Kenntnisse

Conditions

Die Arbeit ist in die umfangreichen Aktivitäten der Abteilung Nanoelektronik (FWIO) zu 2D-Werkstoffen eingebettet. Sie kann jederzeit aufgenommen werden.

Online application

Please apply online: english / german

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Self-organized nanopattern formation on crystalline surfaces of III-V semiconductors (Id 341)

Master theses / Diploma theses

Foto: AFM images of ion-induced surface patternings ©Copyright: Dr. Denise ErbVarious metals, semiconductors, and oxides form regular nanoscale surface patterns in a complex process of self-assembly under low energy ion irradiation. Depending on both instrinsic factors of the material and externally controllable irradiation conditions, nanopatterns of very different morphologies will form, making ion-induced pattern formation a highly complex process. We study this process with regards to the material properties of various elemental and compound semiconductors, their crystal structure and surface orientation, the influence of irradiation parameters, and the patterning kinetics. Thereby, we expect to obtain new insights into the complex process of ion-induced nanopattern formation in technologically relevant materials.

We offer several projects, focussing each on a specific semiconductor material and its behavior under ion irradiation. These projects comprise the preparation of nanopatterned surfaces by low energy ion irradiation, imaging these surfaces surfaces by atomic force microscopy and electron microscopy, the quantitative analysis of these data, as well as simulating the patterning process based on continuum equations or kinetic MonteCarlo models.
The experimental work on these projects should result a diploma or M.Sc. thesis in physics, material science, or a related field of study. The provide an introduction to research at a large scale facility (Ion Beam Center IBC) and opportunities for networking with HZDR specialists on nanoscale surface modification and characterization.

Department: Ion Beam Center

Contact: Dr. Erb, Denise

Requirements

-- completed B.Sc. studies or Vordiplom in experimental physics, materials science, or related subject
-- good command of German and/or English
-- ability to work independently and systematically

Conditions

-- place of work: HZDR, location Rossendorf
-- project duration: 12 months, flexible starting time

Links:

Online application

Please apply online: english / german

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Materials for new solar power plants (Id 241)

Bachelor theses / Master theses / Diploma theses

Foto: Solar thermal power plant ©Copyright: @AbengoaTurmkraftwerke stellen die neueste Generation von Anlagen zur solarthermischen Elektroenergieerzeugung dar (s. Abbildung). Großflächige Spiegelanordnungen konzentrieren Sonnenlicht auf einen zentralen Absorber, wo es in Wärmeenergie umwandelt wird, die dann auf ein Wärmeträgermedium übertragen wird. Gegenüber der Photovoltaik hat die Solarthermie den inhärenten Vorteil, Energie zu speichern und bei Bedarf bereit zu stellen. Die Herausforderung für die weitere Erhöhung des Wirkungsgrades von Solarkraftwerken besteht in der Entwicklung von Werkstoffen mit einer Temperaturstabilität bis zu 800 °C an Luft.
Im Rahmen von Graduierungsarbeiten und Hilfstätigkeiten sollen thermisch stabile Beschichtungen für die Kernkomponenten von Solarturmkraftwerken entwickelt und getestet werden. Dabei kommen modernste in situ und ex situ Methoden wie Magnetronsputtern, Ellipsometrie, UV-vis-NIR-FTIR-Reflektometrie und Ramanspektroskopie zur Anwendung.
Zu diesem Themenbereich werden u. a. die folgenden Aufgabenstellungen angeboten:
i) Schichtabscheidung und Optimierung der optischen und elektrischen Eigenschaften von transparenten leitfähigen Oxiden für Solarkraftwerke;
ii) Entwicklung von neuartigen Absorber- und Wärmespeicherwerkstoffen für Solarkraftwerke;
iii) Design und Simulation von solarselektiven Beschichtungen für Solarkraftwerke.

Zur Charakterisierung der untersuchten Materialien stehen modernste in situ und ex situ Analysemethoden zur Verfügung. Die Arbeiten können jederzeit aufgenommen werden.

Department: Nanomaterials and Transport

Contact: Dr. Krause, Matthias

Requirements

1. Studium der Werkstoffwissenschaften, Physik oder Chemie
2. Interesse, Freude und Befähigung für experimentelle wissenschaftliche Arbeit
3. Grundkenntnisse in Programmierung und sicherer Umgang mit Büro- und wissenschaftlicher Software
4. Sichere Englischsprachkenntnisse (fließend oder besser)

Conditions

Internationale Forschungsumgebung, ortsübliche Aufwandsentschädigung

Online application

Please apply online: english / german

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