TY - JOUR A1 - Schönhals, Andreas A1 - Frunza, Ligia A1 - Frunza, Stefan A1 - Bentrup, U. A1 - Fricke, R. A1 - Pitsch, I. A1 - Kosslick, H. T1 - Confinement of nematic liquid crystals in SBA mesoporous materials T2 - Studies in surface science and catalysis N2 - This work presents some results obtained by confining octylcyanobiphenyl (8CB) to the pores of two SBA-15 type host materials: a silica SBA-15 (pores of 10.2 nm) and an aluminum containing AlSBA-15 (pores of 7.5 nm). The LC molecules were loaded inside the pores from a solution in acetone, in a percentage higher than 70% from the maximum possible loading. It was observed that the 8CB molecules confined to molecular sieves may preserve the phase transitions characteristic for the bulk LC provided that the confining pores are sufficiently large, as offered by SBA materials. However, present guest-host interactions play an important role in these phase transitions. Such a behavior is at variance with the 8CB confined to Controlled Porous Glass with the same pore dimensions, for which the bulk-like phase transitions can be always observed. PB - Elsevier CY - Amsterdam T2 - 2nd International FEZA conference CY - Taormina, Italy DA - 2002-09-01 PY - 2002 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/2263 AN - OPUS4-2263 SN - 0167-2991 VL - 142 IS - 2 SP - 1323 EP - 1329 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany