TY - JOUR A1 - Knochenhauer, Gerald A1 - Reiche, Jürgen A1 - Barberka, Thomas Andreas A1 - Woolley, Martin A1 - Tredgold, Richard H. A1 - Hodge, P. A1 - Brehmer, Ludwig T1 - Do perfluorianted chains always have to be twisted? N2 - Short perfluorinated cabon chains do not take on helical structure when they are closely packed Y1 - 1995 ER -