24-27 November 2022
Karlsruhe Institute of Technology
Europe/Berlin timezone

Towards dynamic measurements of individualized macromolecules

26 Nov 2022, 16:00
Foyer (KIT Campus South)


KIT Campus South

KIT Campus map: https://www.kit.edu/campusplan/ Building: 30.22 Room: Foyer im 1. und 2. OG Address: Institute of Technology, Engesserstraße 7, 76131 Karlsruhe Coordinates: 49.01244, 8.41062
Poster Physics Posters Poster session


Mrs. Alaa Hassan (Universität Leipzig)


Detailed insight into the dynamics and other functionalities of synthetic polymers on the molecular level is highly desired in advancing nano-technology; however, often, it can be technically challenging. We investigate the dynamics in individualized polymeric chains employing broadband dielectric spectroscopy (BDS). This method revealed altered dynamics under conditions of spatial confinement in the past; however, there is no detailed information about the extent to which the properties of the material change due to individualizing the polymer chains. To address samples of such a small scale, nano-dielectric spectroscopy is developed by refining a nanostructured electrode setup combined with a procedure of chemical surface modification. The latter involves depositing a very regular pattern of gold nanoparticles (AuNPs) of well-controllable size and separation on the nanometer scale. These AuNPs act as anchors for the chemical grafting of end-functionalized polymers (e.g., thiol terminated PEO). To determine the (average) number and conformation of chains grafted to each AuNP, their volume and shape are characterized by AFM.

Category Other

Primary author

Mrs. Alaa Hassan (Universität Leipzig)


Dr. Martin Tress (Universität Leipzig)

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