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Universität Hamburg | DESY

Analysis of Elemental Distribution in CdSe Nanowires upon Cation-Exchange

  • Online since 01/04/2021
  • 210401-462439
  • Sonstige


Research Goal

Colloidally grown CdSe nanowires (NWs) may serve as templates for the synthesis of metallic Ag2Se NWs via cation exchange. A detailed knowledge of the exchange kinetics and the spatial distribution of the silver ions is essential when designing opto-electronic devices. Thus, Ag2xCd1-xSe NWs were investigated after sequential exchange steps using X-ray fluorescence (XRF) at the scanning X-ray microscope P06 at DESY. The preliminary visualization of the elemental distribution rendered promising results: for the first time, we could detect all involved ions.

However, a comprehensive analysis comprising a sophisticated fitting procedure is still lacking. Especially the analysis of the silver dopant introduced during the initial exchange steps requires customized algorithms for a quantitative analysis of the chemical processes at the nanoscale.



  • Analysis of pre-existing data with respect to the elemental distribution in Ag2xCd1-xSe NWs upon cation exchange
  • Comparison of different fitting methods and development/ refinement of a Python-based procedure
  • Correlation of the X-ray microscopy data with supplementary data from laboratory-based measurements (SEM, AFM)
  • Participation at synchrotron beamtimes
  • Scientific presentation of the results

If you are interested in the project, don’t hesitate to write us an email or talk to us after lectures.


Begin: Anytime

Program: Physics, CiS, Nanoscience

Where: DESY

Remote-office regulations may apply, according to the current COVID-19 situation

Language: German, English

Ad data

Type of employment
By arrangement
Period of employment
Custom free text
Application deadline
Sunday, 30th of May 2021 - 11:59PM
Application mail

Contact details

UHH Universität Hamburg
Notkestraße 85
22607 Hamburg, Germany
Contact person
Mr Dr. Michael Stückelberger
E-Mail address


Mr Dr. Michael Stückelberger

Job location

Universität Hamburg | DESY

Notkestraße 85
22607 Hamburg