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Jobs

 

  • We always welcome motivated students (Bachelor, Master) who are interested in nanomaterials.

  • Motivated scholarship holders are of course always welcome.

  • Applications for highly motivated "HiWis" are always welcome.

 


  • Open student research assistant position - We are hiring!

 

1) Optimization of gold nanoparticle arrays for nanostructured electrets

 

Tasks and goals: The project NanoTret (livMatS excellence cluster) is about the development of nano-/ microstructured permanently charged surfaces for electrostatic mechanical energy harvesters. Your task will be to make electrets based on isolated gold nanoparticles. The nanoparticles are arranged in a hexagonal array on the substrate with the help of micellar nanolithography. After the deposition by spin‑coating, you will also do the charging of the electret with a corona discharge or a tunneling current. The gold nanoparticles are used because they should capture and hold the charges for a very long time. Thus, a quasipermanent electric field originates from these nanoparticles after charging.

The goal of your work will be to optimize the fabrication of the hexagonally structured gold nanoparticles. This includes the improvement of the size distribution and alignment of the nanoparticles. Through your work on micellar nanolithography, you will get a complex understanding of a very versatile method for patterning a surface. Furthermore, you will learn the basics of working with silicon chips and gain insights into several interesting techniques like scanning electron microscopy.

Expectations: It would be desirable that you have a basic knowledge of lab work. Further, it would be great if you would consider yourself as a careful and clean worker because in the area of nanoparticles dirt can be terrible. That is all I am expecting of you, apart from being motivated.

Orga: HiWi positions are remunerated according to the usual rates and working hours can be arranged flexibly by arrangement.

Start: Immediately.

 

For more details contact niklas.maier@livmats.uni-freiburg.de with cc anna.fischer@ac.uni-freiburg.de

Please send a short motivation letter (half page) and your CV to the above-mentioned e-mail addresses. We are looking forward to your application!

 

 

2) Synthesis of mesoporous carbons as support materials for catalysts

 

Tasks and goalsThe aim of this work is the scaled synthesis and characterization of different carbon materials for electrochemical applications. On the one hand, mesoporous nitrogen-doped carbon (MPNC) will be synthesized by hard templating through SiO2 nanoparticles. By adjusting the synthesis parameters, particle size as well as pore size and wall thickness of the particles can be controlled. Further post-treatment is performed to refine the physicochemical properties of the carbon. The characterization of the produced particles is then performed by elemental analysis, X-ray diffraction, Raman spectroscopy, electron microscopy and gas adsorption.

Expectations: After a detailed introduction, independent work with proactive thinking and high accuracy and motivation is expected. Practiced and confident working in the lab is necessary, synthesis experience is desirable. English or German speaking Students from the fields of chemistry and materials science are welcome.

Orga: HiWi positions are remunerated according to the usual rates and working hours can be arranged flexibly by arrangement.

Start: Immediately.

 

For more details contact sven.kuespert@fmf.uni-freiburg.de , niklas.ortlieb@ac.uni-freiburg.de and cc anna.fischer@ac.uni-freiburg.de

Please send a short motivation letter (half page) and your CV to the above-mentioned e-mail addresses. We are looking forward to your application!

 

3) MAX and MXene from molten metals and molten salts

 

Tasks and goals: The project aims at optimization of the synthesis procedure of two-dimensional MXenes from the Mn+1AXn, where M denotes a transition metal, A is an element such as aluminum or silicon, and X is either carbon or nitrogen. Obtained few-atoms-thick layers will be used for the preparation of electrodes using advanced deposition techniques such as, doctor-blade coating, spray coating or 3D printing. The electrochemical performance of the produced electrodes will be investigated for the supercapacitor and battery systems.

You will acquire experience in synthesis of MAX and MXenes, their processing, electrochemical characterization and implementation into functional devices. 

Expectations: we are looking for a motivated candidate from the field of chemistry or material science. Knowledge in electrochemistry and/or experience in synthesis is a plus.

Orga: HiWi positions are remunerated according to the usual rates and working hours can be arranged flexibly by arrangement.

Start: Immediately.

 

For more details contact taisiia.berestok@livmats.uni-freiburg.de and cc anna.fischer@ac.uni-freiburg.de

Please send a short motivation letter (half page) and your CV to the above-mentioned e-mail addresses. We are looking forward to your application!

 

4) Electrochemical Characterization of Pt based fuel cell electrocatalysts

 

Tasks and goals: The main goals of your work will be to characterize carbon support materials synthesized in the Fischer Lab as well as platinum loaded derivatives in terms of their electrochemical properties by means of rotating disk electrode (RDE) measurements. You will focus on the determination of the double layer capacity of these materials and how it changes under certain accelerated stress test (AST) protocols. You will also investigate Pt loaded carbons with respect to their electrochemical active surface area (ECSA) by cyclic voltammetry and CO stripping experiments. Subsequently, you will determine the oxygen reduction reaction activity of these materials and assess their stability in terms of ECSA and activity upon AST protocols. Besides daza evaluation, your task will also include the comprehensive presentation of your results. You will closely work with a project team of PhDs and Post-Docs.

You will acquire in-depth experience in electrochemical testing of fuel cell catalysts in regard to their activity and stability on the RDE level. 

Expectations: After a detailed introduction, independent work with proactive thinking and high motivation is expected. Basic knowledge of electrochemistry is desirable, but not mandatory. Students from the field of chemistry and materials science are welcome.

Orga: HiWi positions are remunerated according to the usual rates and working hours can be arranged flexibly by arrangement.

Start: Immediately.

 

For more details contact sven.kuespert@fmf.uni-freiburg.de and cc anna.fischer@ac.uni-freiburg.de

Please send a short motivation letter (half page) and your CV to the above-mentioned e-mail addresses. We are looking forward to your application!

 

5) Advanced Materials and Electrodes for the Development of Energy Storage Devices

 

Tasks and goals: The project aims at the optimization of the synthesis procedure for MoSx-decorated mesoporous carbon nanostructures. With a special focus on morphology and physicochemical property control, the obtained materials will be fine-tuned for electrochemical supercapacitors and batteries. The obtained carbons will be used for the preparation of electrodes using advanced deposition techniques such as doctor-blade coating, spray coating or 3D printing. The electrochemical performance of the produced electrodes will be investigated for electrochemical pseudocapacitor and Lithiom-ion battery systems.

You will acquire experience in the synthesis of carbon nanomaterials, their processing, electrochemical characterization and implementation into functional devices. 

Expectations: We are looking for a motivated candidate from the field of chemistry or material science. Knowledge in electrochemistry and/or experience in synthesis is a plus.

Orga: HiWi positions are remunerated according to the usual rates and working hours can be arranged flexibly by arrangement.

Start: Immediately.

 

For more details contact taisiia.berestok@livmats.uni-freiburg.de and cc anna.fischer@ac.uni-freiburg.de

Please send a short motivation letter (half page) and your CV to the above-mentioned e-mail addresses. We are looking forward to your application!

 

6) Li - Ion battery based Photobatteries 

 

Tasks and goals: Our battery research in the DFG Excellence Cluster livMatS focuses on Cathode and Anode Materials for photo rechargeable Li-Ion Battery Systems. You will build Li-Ion Batteries in Coin Cells and Swagelok T-Cell in half cell and full cell setups. Further the preparation of electrode slurries and their casting via doctor blading will be part of your work. The electrochemical characterization will be done with standard measurement protocols and the techniques include Galvanostatic Charge Discharge, Cyclic Voltammetry and Electrochemical Impedance Spectroscopy. You will learn all relevant lab techniques in preparing electrode slurries and electrodes for Li-Ion-Battery Anode and Cathodes. You will learn how to build different lab scale characterization setups for Li-Ion Batteries such as Coin Cells and Swagelok T-Cells and how to characterize Li-Ion Battery half cells and full cells electrochemically. All of the techniques used are scalable to industrial levels and actually used in nowadays battery production processes.

Expectations: We are looking for a motivated student from the field of chemistry or material science (a Bachelor or Master is not needed but of course welcome). Knowledge in electrochemistry and/or experience in synthesis is a plus.

Orga: The contract will have between 30 and 40 hours per month. The salary depends on the working hours per month and whether you already have a bachelor degree or not, but will be between 370 and 450 € per month.

Start: Immediately.

 

For more details contact jan.buettner@livmats.uni-freiburg.de and cc anna.fischer@ac.uni-freiburg.de

Please send a short motivation letter (half page) and your CV to the above-mentioned e-mail addresses. We are looking forward to your application!

 


 

  • Open Master Topics:


We are currently searching for master candidates to work on one of the following topics:

a) Synthesis, characterization and application of nanostructured photoanodes for water oxidation and beyond

b) Synthesis, characterization and application of nanostructured ORR electrocatalysts for heavyduty fuel cells

c) Synthesis, characterization and application of nanostructured N2 reduction electrocatalysts

d) Synthesis, characterization and application of nanostructured CO2 reduction electrocatalysts

e) Synthesis, characterization and application of nanostructured electrodes for enzyme electrocatalysis

f)  Synthesis, characterization and application of nanostructured electrets


Applications should be send to anna.fischer@ac.uni-freiburg.de

 

 

 

 

 

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