Synthesis and Structure-Property Relations of a Series of Photochromic Molecular Glasses for Controlled and Efficient Formation of Surface Relief Nanostructures

Title data

Walker, Roland ; Audorff, Hubert ; Kador, Lothar ; Schmidt, Hans-Werner:
Synthesis and Structure-Property Relations of a Series of Photochromic Molecular Glasses for Controlled and Efficient Formation of Surface Relief Nanostructures.
In: Advanced Functional Materials. Vol. 19 (2009) Issue 16 . - pp. 2630-2638.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.200900140

Official URL:

Abstract in another language

This paper reports on the synthesis and properties of a new series of photochromic molecular glasses and their structure-property relations with respect to a controlled and efficient formation of surface relief nanostructures. The aim of the paper is to establish a correlation between molecular structure, optical susceptibility, and the achievable surface relief heights. The molecular
glasses consist of a triphenylamine core and three azobenzene side groups attached via an ester linkage. Structural variations are performed with respect
to the substitution at the azobenzene moiety in order to promote a formation of a stable amorphous phase and to tune absorption properties and molecular dynamics. Surface relief gratings (SRGs) and complex surface patterns can easily be inscribed via holographic techniques. The modulation heights are
determined with an equation adapted from the theory for thin gratings, and the values are confirmed with AFM measurements. Temperature-dependent
holographic measurements allow for monitoring of SRG build-up and decay and the stability at elevated temperatures, as well as determination of the
glass transition temperature. SRG modulation heights of above 600 nm are achieved. These are the highest values reported for molecular glasses to date.
The surface patterns of the molecular glasses are stable enough to be copied in a replica molding process. It is demonstrated that the replica can be used to transfer the surface pattern onto a common thermoplastic polymer.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I Research Institutions Research Institutions > Research Centres Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Result of work at the UBT:	Yes
DDC Subjects:	500 Science 500 Science > 500 Natural sciences 500 Science > 530 Physics 500 Science > 540 Chemistry
Date Deposited:	27 Mar 2015 10:02
Last Modified:	25 Jun 2015 10:31
URI:	https://eref.uni-bayreuth.de/id/eprint/8656