Multiple electron diffraction and two-dimensional crystalline order in liquid-crystal thin films.
Electron diffraction in freestanding thin films in the crystal-B phase reveals extensive multiple diffraction in films of 14S5 but not of 4O.8, suggesting an important difference in the structural order in these films despite the similarities in their positional correlations found in earlier experiments. The result in a two-layer 14S5 film indicates surprisingly that secondary diffraction can occur in a crystal with only pseudo-long-range positional order.
Chao
Chih-Yu
CY
Department of Physics, National Taiwan University, Taipei 10617, Taiwan, Republic of China. cychao@phys.ntu.edu.tw
Pan
Tung-Cheng
TC
Chou
Chia-Fu
CF
Ho
John T
JT