TY - JOUR
T1 - Conformational Changes of a Surface-Tethered Polymer during Radical Growth Probed with Second-Harmonic Generation
AU - Deckers, Steven
AU - Bloemen, Maarten
AU - Koeckelberghs, Guy
AU - Glorieux, Christ
AU - Verbiest, Thierry
AU - Van der Veen, Monique A.
PY - 2017/5/2
Y1 - 2017/5/2
N2 - The surface-induced polymerization of a chromophore-functionalized monomer was probed in situ for the first time using a nonlinear optical technique, second-harmonic generation. During the first hours of the polymerization reaction, dramatic changes in the tilt angle of the chromophore-functionalized side groups were observed. Following evaluation of the nonlinear optical data with those obtained from atomic force microscopy and ultraviolet-visible, we conclude that second-harmonic generation efficiently probes the polymerization reaction and the conformational changes of the surface-grafted polymer. With polymerization time, the conformation of the surface-tethered polymer changes from a conformation with the polymer backbone and its side groups flat on the surface, i.e., a “pancake” conformation, to a conformation where the polymer backbone is stretched away combined with tilted side groups or an enlarged tilt angle distribution, i.e., a “brush-type” conformation.
AB - The surface-induced polymerization of a chromophore-functionalized monomer was probed in situ for the first time using a nonlinear optical technique, second-harmonic generation. During the first hours of the polymerization reaction, dramatic changes in the tilt angle of the chromophore-functionalized side groups were observed. Following evaluation of the nonlinear optical data with those obtained from atomic force microscopy and ultraviolet-visible, we conclude that second-harmonic generation efficiently probes the polymerization reaction and the conformational changes of the surface-grafted polymer. With polymerization time, the conformation of the surface-tethered polymer changes from a conformation with the polymer backbone and its side groups flat on the surface, i.e., a “pancake” conformation, to a conformation where the polymer backbone is stretched away combined with tilted side groups or an enlarged tilt angle distribution, i.e., a “brush-type” conformation.
UR - http://www.scopus.com/inward/record.url?scp=85018274529&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.7b00172
DO - 10.1021/acs.langmuir.7b00172
M3 - Article
AN - SCOPUS:85018274529
SN - 0743-7463
VL - 33
SP - 4157
EP - 4163
JO - Langmuir: the ACS journal of surfaces and colloids
JF - Langmuir: the ACS journal of surfaces and colloids
IS - 17
ER -