Berlin 2012 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 5: Soft Matter I

DY 5.6: Talk

Monday, March 26, 2012, 16:15–16:30, MA 004

Molecular dynamics and morphology in confined 4-heptan-4-isothiocyanatobiphenyl liquid crystals — •Malgorzata Jasiurkowska¹, Wilhelm Kossack¹, Roxana Enea¹, Ciprian Iacob¹, Wycliffe Kipnusu¹, Periklis Papadopoulos², Joshua Sangoro¹, Maria Massalska-Arodz³, and Friedrich Kremer¹ — ¹Institute of Experimental Physics I, University of Leipzig, Linnestr. 5, 04103 Leipzig, Germany — ²Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany — ³The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland

Molecular dynamics and orientational order of 4-heptan-4-isothiocyanatobiphenyl (7BT) confined in non-intersecting pores of mean diameters from 4 nm to 10.5 nm are studied by a combination of Broadband Dielectric and Fourier-Transform Infrared Spectroscopy. In contrast to well-known bulk dielectric properties of nBTs, confinement leads to modification of the molecular dynamics. Infrared Transition Moment Orientational Analysis reveals different molecular arrangement in pores of diameters 10.5 nm compared to the molecules enclosed in 4 nm and 6 nm diameter pores