
UHH Universität Hamburg | DESY
Analysis of Elemental Distribution in CdSe Nanowires upon Cation-Exchange
- Online seit 01.04.2021
- 210401-462439
- Sonstige
Beschreibung
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.
Anforderungsprofil
Tasks
- 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.
Conditions
Begin: Anytime
Program: Physics, CiS, Nanoscience
Where: DESY
Remote-office regulations may apply, according to the current COVID-19 situation
Language: German, English
Anzeigendaten
- Art der Beschäftigung
- Nach Vereinbarung
- Zeitraum der Beschäftigung
- Benutzerdefinierter Freitext
- Bewerbungsfristsende
- Sonntag, 30. Mai 2021 - 23:59
- Bewerbungs-E-Mail
- michael.stueckelberger@desy.de
Kontaktdetails
- Hochschule / Einrichtung
- UHH Universität Hamburg
- Institut / Einrichtung
- DESY
- Standort
- Notkestraße 85
- 22607 Hamburg, Deutschland
- Kontaktperson
- Herr Dr. Michael Stückelberger