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Volume 6 Research & Reviews: Journal of Material Sciences Advanced Materials 2018
September 19-21, 2018
September 19-21, 2018 Tokyo, Japan
22nd International Conference on
Advanced Materials and Nanotechnology
Katharina Dabow, Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C4-024
Measuring nanoscale dynamics of grafted RAFT polymer using metal-induced energy transfer
Katharina Dabow
Georg-August-Universität Göttingen, Germany
Tethered polymer chains on a flat surface dramatically change the hydrodynamics of a fluid flow close to the surface.
Simulations even predict a cyclic motion of the grafted chains that results in a backflow due to an applied shear flow. To get
an insight into the molecular dynamics of a polymer chain on a surface being exposed to an external stimulus, Fluorescence
Lifetime Correlation Spectroscopy (FLCS) has proven to be an excellent means. A detailed study in an experimental aspect
requires an efficient and flexible synthesis route to produce a homogeneous polymer layer with an adjustable grafting density
from the mushroom regime up to a high density brush. Surface-Initiated Reversible Addition-Fragmentation chain Transfer
(SI-RAFT) offers the requisite set of properties. We have first conducted Metal-Induced Energy Transfer (MIET) FLCS
measurements of a labeled poly (DMAEMA) high density brush. Via MIET experiments the brush height could be determined
for the samples in a dry state and a swollen state in water. Additional dynamic MIET experiments yielded a correlation lifetime
of t=600 ns for the swollen poly (DMAEMA) brush in water.
Biography
Katharina Dabow is pursuing her PhD in Macromolecular Chemistry from the Georg-August-Universität Göttingen, Germany. Her research focuses on the molecular
dynamics of grafted polymer chains on flat surfaces measured by fluorescence lifetime correlation spectroscopy.