No. of Position(s)


Research area

  • Nanofluids
  • Microfluidic chips
  • Heat Transfer
  • Cooling Systems


Employment as a PhD fellow is a 3-year salaried position (start salary amounts to approx. 3.378,- EURO per month incl. supplements).


Centre NanoSYD
The Mads Clausen Institute
University of Southern Denmark

Starting Date

Mar 01, 2021, or as soon as possible thereafter


For further information on the position please contact 
Associate Professor Till Leissner (phone +45 6550 8378, email:

Associate Professor Serguei Chiriaev (phone: +45 6550 7250, email:, or 

Prof. Horst-Günter Rubahn, head of institute (phone, +45 6011 3517, email:

If you experience technical problems you must contact  


  • Master’s degree in natural sciences or engineering (equivalent to a Danish master’s degree) 
  • Specialisation or experience in at least one of the following fields: thermo-fluid science, nanotechnology, microfluidics, neutron imaging
  • Preferably, experience in modelling fluid dynamics 
  • Fluency in English, both spoken and written
  • Comfortable to work both independently and within a team
  • Good collaboration and communication skills

Responsibilities/Job Description

  • Fabrication of microfluidic heat sink systems 
  • Preparation of nanofluids 
  • Optical characterization of nanofluids, e.g., with dynamic light scattering and dark field microscopy 
  • Device characterization with Helium ion beam microscopy to image particle sedimentation
  • Preparation of devices for imaging at ESS and, if applicable, first neutron imaging studies
  • Numerical modelling of nanofluids multi-phase flow in microfluidic systems

Assessment Process

Read about the Assessment and selection process. Shortlisting may be used.

How to Apply?

fill out the online application form, and attach all your materials in English in one PDF file.

Documents required

The application must be in English and must include – the required forms must be found at the above mentioned Faculty website:

  • Completed TEK PhD application form for 5+3 applicants.
  • Motivation letter stating your specific interest, motivation and qualifications for the project in question (max. 2 pages). Upload in the field called “Project description”. 
  • Detailed Curriculum Vitae, describing research, publication and teaching experience, computational skills and including personal contact information.
  • Verified copies of the official bachelor diploma and master’s diploma and transcripts of exams, both original and translated into English.
  • Completed TEK PhD form for calculation grade point average. Upload in one of the fields called “Publication”. 
  • An official document describing the grading scheme of the awarding universities (if not Danish). Upload in one of the fields called “Publication”. 
  • An official and verified written assessment of the thesis or dissertation project from the grade giving institution, if the thesis/examination project is evaluated by approved/passed. The statement must clearly state that the candidate has been among the top 30 pct. in the graduation class for the study programme.
  • References, if any. You’re welcome to use the form for reference letter at the Faculty website.
  • List of publications and maximum 2 examples of relevant publications, in case you have any publications. Please attach one pdf-file for each publication. 

The University wishes our staff to reflect the diversity of society and thus welcomes applications from all qualified candidates regardless of personal background.

About The PhD project

The increase in heat transfer rate in various applications and devices calls for new ways of efficient device cooling to increase their reliability and efficiency. Suspensions of dispersed nanoparticles in common fluids and refrigerants, so-called ‘nanofluids’, offer a high potential for controlling the heat transfer and increasing heat exchange efficiency. In particular, nanofluids are suited for small-volume cooling devices based on microfluidic chips as well as porous materials. However, the stability of nanofluids is still a limiting factor which decreases their efficiency in engineering applications. Accumulation at the walls and agglomeration among particles are common issues caused by interactive forces, which effect the dispersion, rheology, and overall performance of those suspensions. Hence, knowledge about the interaction of nanomaterials with the liquid is of fundamental importance.

The PhD position is centered around studying experimentally fundamental processes of nanofluid multi-phase flow in model microfluidic systems. Nanofluid fabrication, high-resolution Helium ion microscopy, dynamic light-scattering particle characterization and other microscopy techniques will be used for that at NanoSYD in Sønderborg. In addition, it is intended to implement time-resolved neutron imaging at the European Spallation Source (ESS), located in Lund/Sweden. Neutron imaging is an ideal tool for visualizing nanofluid multi-phase flow, particularly to investigate the boiling mechanism in terms of bubble dynamics because of the high interaction cross-section of neutrons with liquids. Experimental work is to be combined with numerical modelling of fluid dynamics.

About SDU NanoSYD

We focus our research on improving the performance of device incl. their reliability and stability, as well as on up-scaling, and bridge the academic field to industrial development. Here, devices from organic molecules and polymers include solar cells, transistors, diodes, and sensors.

Thin films are grown from organic and inorganic compounds. Organic molecules self-assemble into nanoscopic aggregates with special optical features. We investigate their properties by diffraction techniques, scanning probe microscopies such as scanning electron and scanning ion microscopies, and coherent as well as incoherent optical techniques. Furthermore, we focus on basic and applied research in nanophotonics and nanoplasmonics, which are interdisciplinary research areas concerned with the generation and manipulation of electromagnetic excitations at the sub-wavelength scale. 

Other Details

The PhD fellow will work in a trans-disciplinary team dedicated to micro- and nanoscience. We offer an international and stimulating environment with state-of-the-art infrastructure and equipment for conducting research of high quality.

The successful candidates will be affiliated with the nanoscience centre NanoSYD at the Mads Clausen Institute, University of Southern Denmark which is located at the Faculty of Engineering on the international campus in Sønderborg, Denmark.

The project is related to research activities at the recently established Centres for Industrial Electronics and Industrial Mechanics and will involve close cooperation with the vibrant industrial environment in the cross-border region Denmark-Germany.

The work is funded by SOLID, a Danish national lighthouse cluster in the field of hard materials. At the cluster, cutting-edge research in 3D imaging, image analysis and modelling is performed, with the intention to include future neutron imaging at the European Spallation Source in Lund/Sweden.


Applicants are required to have a master’s degree (equivalent to a Danish master’s degree) at the time of enrollment and employment.

Employment of a PhD fellow can only happen after the Head of the PhD School has approved the candidate for admission to the PhD school. Employment and enrollment will cease without further notice at the end of the period.

A PhD fellow is not allowed to have any kind of sideline employment, while enrolled as PhD fellow at the faculty.

Employment is governed by the Protocol on PhD Research Fellows signed by the Danish Ministry of Finance and the Danish Confederation of Professional Associations. Please check links for more information on salary and taxation.

The successful candidate will be enrolled at SDU in accordance with Faculty regulations and the Danish Ministerial Order on the PhD Programme at the Universities (PhD order), read more here

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